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PERSONAL INJURY.
NOTE: The most reliable, efficient, and accurate means to diagnose the Vehicle Theft Security Sys- tem (VTSS) and Sentry Key Immobilizer System (SKIS) involves the use of a DRBlllT scan tool and the proper Powertrain Diagnostic Procedures man- ual.
The Vehicle Theft Security System (VTSS), Sentry Key Immobilizer System (SKIS) and the Programma- ble Communication Interface (PCI) bus network should be diagnosed using a DRBIIIt scan tool. The DRBIIIt will allow confirmation that the PCI bus is functional, that the Sentry Key Immobilizer Module (SKIM) is placing the proper messages on the PCI bus, and that the Powertrain Control Module (PCM) and the Instrument Cluster are receiving the PCI bus messages. Refer to the proper Powertrain or Body Diagnostic Procedures manual.
Visually inspect the related wiring harness connec- tors. Look for broken, bent, pushed out or corroded terminals. If any of the conditions are present, repair as necessary. Refer to Wiring Diagrams for complete circuit descriptions and diagrams. Refer to (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MOD- ULES/SENTRY KEY IMMOBILIZER MODULE - REMOVAL) for SKIM replacement.
VEHICLE THEFT SECURITY
8Q - 3
STANDARD PROCEDURE
CONFIGURING A NEW MODULE / SWITCH OPERATING MODES
To configure a new module or to switch operating
modes, a DRBIIIt scan tool must be used.
(1) Hook up the DRBIIIt scan tool to the Data
Link Connector (DLC).
(2) With the key in the ignition, turn the key to
(3) After the DRBIIIt scan tool initialization, per-
the RUN position.
form the following:
(a) Select “Theft Alarm.” (b) Select “VTSS.” (c) Select “Miscellaneous.”
(4) Once in the “Miscellaneous” screen:
(a) If you wish to configure a new module, select
“Configure Module.”
(b) If you wish to put the module into customer
usage mode, select “Enable VTSS.”
(c) If you wish to put the module into dealer lot
mode, select “Dealer Lot.”
SENTRY KEY IMMOBILIZER SYSTEM INITIALIZATION
The Sentry Key Immobilizer System (SKIS) initial- ization should be performed following a Sentry Key Immobilizer Module (SKIM) replacement. It can be summarized by the following: (1) Obtain the vehicles unique PIN number assigned to it’s original SKIM from the vehicle owner, the vehicle’s invoice or from Chrysler’s Cus- tomer Center.
(2) With the DRBIIIt scan tool, select
“Theft Alarm,” “SKIM,” Miscellaneous.” Select “SKIM Mod- ule Replaced” function and the DRBIIIt will prompt you through the following steps.
(3) Enter secured access mode using the unique
four digit PIN number.
(4) Program the vehicle’s VIN number into the
(5) Program the country code into the SKIM’s
SKIM’s memory.
memory (U.S.).
(6) Transfer the vehicle’s unique Secret Key data from the PCM. This process will require the SKIM to be in secured access mode. The PIN number must be entered into the DRBIIIt before the SKIM will enter secured access mode. Once secured access mode is active, the SKIM will remain in that mode for 60 seconds.
(7) Program all customer keys into the SKIM’s memory. This required that the SKIM be in secured access mode The SKIM will immediately exit secured access mode after each key is pro- grammed.
VEHICLE THEFT SECURITY
8Q - 4
VEHICLE THEFT SECURITY (Continued)NOTE: If a PCM is replaced, the unique “Secret Key” data must be transferred from the SKIM to the PCM. This procedure requires the SKIM to be placed in SECURED ACCESS MODE using the four digit PIN code.
SENTRY KEY IMMOBILIZER SYSTEM TRANSPONDER PROGRAMMING
to
recognize
Two programmed Sentry Key transponders are included with the Sentry Key Immobilizer System (SKIS) when it is shipped from the factory. The Sen- try Key Immobilizer Module (SKIM) can be pro- grammed additional transponders, for a total of eight Sentry Keys. The following “Customer Learn” programming procedure for transponders requires access to at least two of the valid Sentry Keys. If two valid Sentry Keys are not available, Sen- try Key programming will require the use of a DRBIIIt scan tool.
the programming of additional
six
up
to
CUSTOMER LEARN PROGRAMMING
(1) Obtain the additional Sentry Key transponder blank(s) that are to be programmed for the vehicle. Cut the additional Sentry Key transponder blanks to match the ignition lock cylinder mechanical key codes.
(2) Insert one of the two valid Sentry Key tran- sponders into the ignition switch and turn the igni- tion switch to the ON position.
(3) After the ignition switch has been in the ON position for about three seconds, but no more than fifteen seconds, cycle the ignition switch back to the OFF position. Replace the first valid Sentry Key in the ignition lock cylinder with the second valid Sen- try Key and turn the ignition switch back to the ON position. Both operations must be performed within 15 seconds.
(4) In approximately ten seconds the VTSS indica- tor LED will start to flash to indicate that the sys- tem has entered the “Customer Learn” programming mode.
(5) Within approximately sixty seconds of entering the “Customer Learn” programming mode, turn the ignition switch to the OFF position, replace the valid Sentry Key with a blank Sentry Key transponder, and turn the ignition switch back to the ON position. (6) In approximately ten seconds, the VTSS indica- tor LED will stop flashing and stay on solid for approximately three seconds and then turn OFF to indicate that the blank Sentry Key transponder has been successfully programmed. The SKIS will imme- diately return to normal system operation following exit from the “Customer Learn” programming mode.
DR
(7) Repeat this process for each additional Sentry
Key transponder blank to be programmed.
If any of the above steps is not completed in the proper sequence, or within the allotted time, the SKIS will automatically exit the “Customer Learn” programming mode. The SKIS will also automatically exit the “Customer Learn” programming mode if it sees a non-blank Sentry Key transponder when it should see a blank, if it has already programmed eight valid Sentry Keys, or if the ignition switch is turned to the OFF position for more than about fifty seconds.
NOTE: While in Customer Learn mode (LED flash- ing), the engine will not START and RUN.
PROGRAMMING BLANK SENTRY KEY TRANSPONDERS WITH A DRBIIIT SCAN TOOL
When programming a blank Sentry Key transpon- der, the key blank must first be cut to match the ignition lock cylinder. It will also be necessary to enter the vehicle’s four digit PIN code into the DRBIIIt scan tool to enter the Sentry Key Immobi- lizer Module’s (SKIM’s) secured access mode.
NOTE: Once a Sentry Key is programmed to a par- ticular vehicle, it cannot be transferred to another vehicle.
Sentry Key programming succeeds.
Insert the blank key into the ignition and turn it to the RUN position. Using the DRBIIIt scan tool, select “Theft Alarm,” then “SKIM,” then “Miscella- neous.” Select “Program New Key.” Enter the four digit PIN code using the DRBIIIt. When program- ming is completed, the SKIM will exit secured access mode and the DRBIIIt will display the status of the key. One of five different status messages may be dis- played as follows: † “Programming Successful” is displayed if SKIM † “Learned Key in Ignition” is displayed if the key in the ignition has already been programmed into that vehicle’s SKIM. † “8 Keys Already Learned (At The Maximum) Programming Not Done” is displayed if eight keys have already been programmed into the SKIM. In this case, if a new key needs to be added due to a lost or defective key, the “Erase All Keys” function (requires entering secured access mode) has to be performed. Then the customer’s seven keys plus the new key MUST be reprogrammed into the SKIM. † “Programming Not Attempted” is displayed after † “Programming Key Failed” is displayed if fur-
an “Erase All Keys” function is executed.
ther diagnosis is required.
DR VEHICLE THEFT SECURITY (Continued) † To learn additional keys, turn the ignition OFF, remove the learned key, and insert the next new blank key. Turn ignition to the RUN position and re- enter the secured access mode function and repeat the “Program New Key” procedure outlined above.
SENTRY KEY IMMOBILIZER SYSTEM INDICATOR LAMP DESCRIPTION
The Sentry Key Immobilizer System (SKIS) uses the Vehicle Theft Security System (VTSS) indicator in the instrument cluster to give an indication when the SKIS is faulty or when the vehicle has been immobilized due to the use of an invalid key. The indicator is controlled by the instrument cluster based upon messages received from the Sentry Key Immobilizer Module (SKIM).
OPERATION
The SKIM sends PCI Bus messages to the instru- ment cluster, to turn on the ’Security” indicator for about 3 seconds when the ignition is turned to the
VEHICLE THEFT SECURITY
8Q - 5
ON position, as a “Bulb” test. After completion of the “Bulb” test, the SKIM sends a PCI bus messages to keep the LED off for 1 second. Then the SKIM sends messages to the instrument cluster to turn the LED off based upon the results if the SKIS self - test. If the indicator illuminates and remains illuminated after the “bulb test”, it indicates that the SKIM has detected a system malfunction and/or the system has become inoperative. If the SKIM detects a invalid key when the ignition switch is turned on, it sends a message to the instrument cluster to flash the “Secu- rity” indicator.
The SKIM can also send messages to the cluster to flash the LED and generate a chime. These functions serve as an indication to the customer that the SKIM is in the Customer Learn programming mode. See Sentry Key Immobilizer System Transponder Pro- gramming in this group for more information on the “Customer Learn” programming Mode.
If the VTSS indicator remains on after the “Bulb” test, the system should be diagnosed using the DRBIIIt scan tool and the proper Powertrain Diag- nostic Procedures manual.
DR
WIPERS/WASHERS
8R - 1
WIPERS/WASHERS
TABLE OF CONTENTS
page
page
WIPERS/WASHERS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
DIAGNOSIS AND TESTING - WIPER &WASHER SYSTEM . . . . . . . . . . . . . . . . . . . . . 6
CLEANING - WIPER & WASHER SYSTEM . . . . . 6
INSPECTION - WIPER & WASHER SYSTEM . . . 7CHECK VALVE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 9WASHER FLUID LEVEL SWITCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 11WASHER HOSES/TUBES
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 11WASHER NOZZLE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 12WASHER PUMP/MOTOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 13
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 14WASHER RESERVOIR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 15
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
REMOVALREMOVAL - EXCEPT V-10 OR DIESEL
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
WIPERS/WASHERS DESCRIPTION
An electrically operated intermittent wiper and washer system is standard factory-installed safety equipment on this model (Fig. 1). The wiper and washer system includes the following major compo- nents, which are described in further detail else- where in this service information: † Check Valve - The washer system check valve is integral to the wye fitting located in the washer
REMOVAL - V-10 OR DIESEL ENGINE
. . . . . 16
INSTALLATION
INSTALLATION - EXCEPT V-10 OR DIESEL
ENGINE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
INSTALLATION - V-10 OR DIESEL ENGINE . . 17WIPER ARM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 18
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 19WIPER BLADE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 19
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 20WIPER HIGH/LOW RELAY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 20
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DIAGNOSIS AND TESTING - WIPER HIGH/LOW RELAY
. . . . . . . . . . . . . . . . . . . . . . . . . 21
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 21WIPER MODULE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 22
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 23WIPER ON/OFF RELAY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 25
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DIAGNOSIS AND TESTING - WIPER ON/OFFRELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 26plumbing between the cowl plenum washer hose and the washer nozzles, and is concealed beneath the cowl plenum cover/grille panel at the base of the windshield. † Front Control Module - The Front Control Module (FCM) is integral to the Integrated Power Module (IPM). The IPM is located in the engine com- partment, near the battery. (Refer to 8 - ELECTRI- CAL/POWER DISTRIBUTION/INTEGRATED POWER MODULE - DESCRIPTION).
8R - 2 WIPERS/WASHERS WIPERS/WASHERS (Continued)
DR
Fig.1Wiper&WasherSystem
1 - WASHER RESERVOIR, PUMP/MOTOR, FLUID LEVEL SWITCH (EXCEPT V-10 & DIESEL ENGINE) 2 - WASHER RESERVOIR, PUMP/MOTOR, FLUID LEVEL SWITCH (V-10 & DIESEL ENGINE ONLY) 3 - WIPER MODULE
† Instrument Cluster - In this model, the instru- ment cluster is also sometimes referred to as the Cab Control Node (CCN). The instrument cluster is located in the instrument panel above the steering column opening, directly in front of the driver. (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DESCRIPTION). † Multi-Function Switch - The multi-function switch is located on the top of the steering column, just below the steering wheel. The multi-function switch includes a control stalk that extends through an opening on the left side of the steering column shrouds and a control knob on the end of the stalk is dedicated to providing all of the driver controls for the wiper and washer systems. (Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/MULTI- FUNCTION SWITCH - DESCRIPTION).
4 - WASHER NOZZLE (2) 5 - WIPER ARM & BLADE (2) 6 - MULTI-FUNCTION (WIPER, WASHER, & LIGHTING) SWITCH
† Washer Fluid Level Switch - The washer fluid level switch is located in a dedicated hole on the out- board side of the washer reservoir in the engine com- partment. † Washer Nozzle - Two fluidic washer nozzles are secured with integral snap features to dedicated openings in the cowl plenum cover/grille panel located near the base of the windshield. † Washer Plumbing - The plumbing for the washer system consists of rubber hoses and molded plastic fittings. The plumbing is routed along the right side of from the washer reservoir, and through a trough near the right end of the cowl plenum cover/grille panel into the cowl plenum to the washer nozzle fittings.
the engine compartment
DR WIPERS/WASHERS (Continued) † Washer Pump/Motor - The electric washer pump/motor unit is located in a dedicated hole on the rearward facing surface of the washer reservoir in the engine compartment. † Washer Reservoir - On all models except those with an optional V-10 or diesel engine, the washer reservoir is secured by integral mounting tabs and a snap feature to slots in the right side of the cooling module shroud in the engine compartment. On mod- els with an optional V-10 or diesel engine, the washer reservoir is secured by screws to the back of the upright left vertical member of the radiator support in the engine compartment. The washer reservoir filler neck is accessed from the engine compartment. † Wiper Arm - The two wiper arms are secured with integral latches to the serrated ends of the two wiper pivot shafts, which extend through the cowl plenum cover/grille panel located near the base of the windshield. † Wiper Blade - The two wiper blades are secured to the two wiper arms with an integral latch, and are parked on the glass near the bottom of the windshield when the wiper system is not in opera- tion.† Wiper High/Low Relay - The wiper high/low relay is an International Standards Organization (ISO) micro relay located in the Integrated Power Module (IPM) in the engine compartment near the battery. † Wiper Module - The wiper pivot shafts are the only visible components of the wiper module. The remainder of the module is concealed within the cowl plenum area beneath the cowl plenum cover/grille panel. The wiper module includes the wiper module bracket, four rubber-isolated wiper module mounts, the wiper motor, the wiper motor crank arm, the two wiper drive links, and the two wiper pivots. † Wiper On/Off Relay - The wiper on/off relay is an International Standards Organization (ISO) micro relay located in the Integrated Power Module (IPM) in the engine compartment near the battery.
Hard wired circuitry connects the wiper and washer system components to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the wiper and washer system components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring infor- mation. The wiring information includes wiring dia- grams, proper wire and connector repair procedures, further details on wire harness routing and reten-
WIPERS/WASHERS
8R - 3
tion, as well as pin-out and location views for the various wire harness connectors, splices and grounds.
OPERATING MODES
The components of the wiper and washer system are designed to work in concert to provide the follow- ing operating modes: † Continuous Wipe Mode - The control knob on the control stalk of the multi-function switch has two continuous wipe positions, Low and High. When selected, these switch positions will cause the two- speed wiper motor to operate in a continuous low or high speed cycle. † Intermittent Wipe Mode - The control knob on the control stalk of the multi-function switch has five minor detent intermittent wipe positions. When selected, these switch positions will cause the wiper system to operate with one of five delay intervals between complete wipe cycles. The intermittent wipe delay intervals are speed sensitive and will be dou- bled when the vehicle speed is about sixteen kilome- ters-per-hour (ten miles-per-hour) or less. † Pulse Wipe Mode - When the control knob on the control stalk of the multi-function switch is depressed to the momentary Wash position for less than about one-half second, the wiper system will operate the wipers for one complete low speed cycle, then will park the wiper blades near the base of the windshield. † Washer Mode - When the control knob on the control the multi-function switch is depressed to the momentary Wash position for more than about one-half second with the wiper system turned Off, the washer pump/motor and the wipers will operate for as long as the washer switch is held closed up to about thirty seconds, then the wipe-af- ter-wash mode is invoked when the control knob is released. When the Wash position is selected with the wiper system operating in a continuous wipe mode, washer fluid will be dispensed onto the wind- shield glass through the washer nozzles for as long as the washer switch is held closed up to about thirty seconds. When the Wash position is selected with the wiper system operating in an intermittent wipe mode, washer fluid is still dispensed until the control knob is released; however, the wipers will operate in a low speed continuous cycle from the time the washer switch is closed until several wipe cycles after the switch is released, before returning to the selected intermittent wipe interval. If the control knob is held in the depressed Wash position for more than about thirty seconds, washer system operation will be suspended until the control knob is released for about two seconds then cycled back to the Wash position.
stalk of
8R - 4 WIPERS/WASHERS WIPERS/WASHERS (Continued) † Wipe-After-Wash Mode - When the control knob on the control stalk of the multi-function switch is depressed to the momentary Wash position for more than about one-half second with the wiper sys- tem turned Off, the washer pump/motor and the wip- ers will operate for as long as the washer switch is held closed up to about thirty seconds, then provide several additional wipe cycles after the control knob is released before parking the wiper blades near the base of the windshield. If the control knob is held in the depressed Wash position for more than about thirty seconds, washer system operation will be sus- pended until the control knob is released for about two seconds then cycled back to the Wash position.
OPERATION
The wiper and washer system is designed to pro- vide the vehicle operator with a convenient, safe, and reliable means of maintaining visibility through the windshield glass. The various components of this sys- tem are designed to convert electrical energy pro- duced by the vehicle electrical system into the mechanical action of the wiper blades to wipe the outside surface of the glass, as well as into the hydraulic action of the washer system to apply washer fluid stored in an on-board reservoir to the area of the glass to be wiped. When combined, these components provide the means to effectively main- tain clear visibility for the vehicle operator by remov- ing excess accumulations of rain, snow, bugs, mud, or other minor debris from the outside windshield glass surface that might be encountered while driving the vehicle under numerous types of inclement operating conditions.
The vehicle operator initiates all wiper and washer system functions with the control knob on the end of the control stalk of the multi-function switch that extends from the left side of the steering column, just below the steering wheel. Rotating the control knob on the end of the control stalk, selects the Off, Delay, Low, or High wiper system operating modes. In the Delay mode, the control knob also allows the vehicle operator to select from one of five intermittent wipe Delay intervals. Depressing the control knob towards the steering column actuates the momentary washer system switch, which selects the Wash, Wipe-After- Wash, and Pulse Wipe Modes depending upon when and how long the switch is held closed. The multi- function switch provides hard wired resistor multi- plexed inputs to the instrument cluster for all of the wiper and washer system functions. The instrument cluster then sends electronic messages to the Front Control Module (FCM) over the Programmable Com- munications Interface (PCI) data bus requesting the appropriate wiper and washer system operating modes.
DR
Wiper and washer system operation are completely controlled by the instrument cluster and FCM logic circuits, and that logic will only allow these systems to operate when the ignition switch is in the Acces- sory or On positions. Battery current is directed from a B(+) fuse in the Integrated Power Module (IPM) to the wiper on/off relay and the wiper high/low relay in the IPM through a fused B(+) circuit. The FCM uses low side drivers to control wiper system operation by energizing or de-energizing the wiper high/low and wiper on/off relays. The FCM uses a high side driver to control the operation of the washer pump motor unit. The multi-function switch circuitry receives a clean ground output from the instrument cluster on a multi-function switch return circuit, then provides resistor multiplexed inputs to the instrument cluster on an intermittent wipe mux circuit to indicate the selected wiper system mode and on a wash/beam select mux circuit to indicate the selected washer sys- tem mode.
The hard wired circuits and components of the wiper and washer system may be diagnosed and tested using conventional diagnostic tools and proce- dures. However, conventional diagnostic methods may not prove conclusive in the diagnosis of the instrument cluster, the FCM, or the electronic mes- sage inputs to or outputs from the instrument cluster or FCM that control the wiper and washer system operating modes. The most reliable, efficient, and accurate means to diagnose the instrument cluster or the FCM inputs and outputs related to the various wiper and washer system operating modes requires the use of a DRBIIIt scan tool. Refer to the appro- priate diagnostic information.
OPERATING MODES
Following are paragraphs that briefly describe the operation of each of the wiper and washer system operating modes.
CONTINUOUS WIPE MODE
When the Low position of the control knob on the control stalk of the multi-function switch is selected the instrument cluster sends an electronic wiper switch low message to the FCM, then the FCM ener- gizes the wiper on/off relay. This directs battery cur- rent the energized wiper on/off relay and the normally closed contacts of the de-energized wiper high/low relay to the low speed brush of the wiper motor, causing the wipers to cycle at low speed.
through the normally open contacts of
When the High position of the control knob is selected the instrument cluster sends an electronic wiper switch high message to the FCM, then the FCM energizes both the wiper on/off relay and the wiper high/low relay. This directs battery current
DR WIPERS/WASHERS (Continued)
through the normally open contacts of the energized wiper on/off relay and the normally open contacts of the energized wiper high/low relay to the high speed brush of the wiper motor, causing the wipers to cycle at high speed.
When the Off position of the multi-function switch control knob is selected, the instrument cluster sends an electronic wiper switch off message to the FCM. If the wiper motor was operating at high speed, the FCM immediately de-energizes the wiper high/low relay causing the wiper motor to return to low speed operation. Then one of two events will occur. The event that occurs depends upon the position of the wiper blades on the windshield at the moment that the control knob Off position is selected.
If the wiper blades are in the down position on the windshield when the Off position is selected, the park switch that is integral to the wiper motor is closed to ground and provides a hard wired park switch sense input to the FCM. The FCM then de-en- ergizes the wiper on/off relay and the wiper motor ceases to operate. If the wiper blades are not in the down position on the windshield at the moment the Off position is selected, the park switch is an open circuit and the FCM keeps the wiper on/off relay energized, which causes the wiper motor to continue running at low speed until the wiper blades are in the down position on the windshield and the park switch input to the FCM is again closed to ground.
INTERMITTENT WIPE MODE
When the control knob on the control stalk of the multi-function switch is moved to one of the Delay interval positions the instrument cluster sends an electronic wiper switch delay message to the FCM, then the FCM electronic intermittent wipe logic cir- cuit responds by calculating the correct length of time between wiper sweeps based upon the selected delay interval input. The FCM monitors the changing state of the wiper motor park switch through a hard wired park switch sense input. This input allows the FCM to determine the proper intervals at which to energize and de-energize the wiper on/off relay to operate the wiper motor intermittently for one low speed cycle at a time.
The FCM logic is also programmed to provide vehi- cle speed sensitivity to the selected intermittent wipe delay intervals. In order to provide this feature the FCM monitors electronic vehicle speed messages from the Powertrain Control Module (PCM) and dou- bles the selected delay interval whenever the vehicle speed is about sixteen kilometers-per-hour (ten miles- per-hour) or less.
WIPERS/WASHERS
8R - 5
PULSE WIPE MODE
When the control knob on the control stalk of the multi-function switch is depressed to the momentary Wash position for less than about one-half second, the instrument cluster sends an electronic washer switch message to the FCM, then the FCM the ener- gizes the wiper on/off relay for one complete wipe cycle. The FCM de-energizes the relay when the state of the park switch sense changes to ground, parking the wiper blades near the base of the windshield.
WASH MODE
When the control knob on the control stalk of the multi-function switch is depressed to the momentary Wash position for more than about one-half second, the instrument cluster sends an electronic washer switch message to the FCM, then the FCM directs battery current to the washer pump/motor unit. This will cause the washer pump/motor unit to be ener- gized for as long as the Wash switch is held closed up to about thirty seconds, and to de-energize when the front Wash switch is released.
When the control knob is depressed to the momen- tary Wash position while the wiper system is operat- ing in one of the Delay interval positions, the washer pump/motor operation is the same. However, the FCM also energizes the wiper on/off relay to override the selected delay interval and operate the wiper motor in a continuous low speed mode for as long as the control knob is held depressed, then de-energizes the relay and reverts to the selected delay mode interval several wipe cycles after the control knob is released. If the control knob is held depressed for more than about thirty seconds, the FCM will sus- pend washer pump/motor operation until the knob is released for about two seconds, then cycled back to the Wash position.
WIPE-AFTER-WASH MODE
When the control knob on the control stalk of the multi-function switch is depressed to the momentary Wash position for more than about one-half second while the wiper system is not operating, the instru- ment cluster sends an electronic washer switch mes- sage to the FCM, then the FCM the directs battery current to the washer pump/motor unit and energizes the wiper on/off relay. This will cause the washer pump/motor unit to be energized and operate the wiper motor in a continuous low speed mode for as long as the Wash switch is held closed up to about thirty seconds. When the control knob is released, the FCM de-energizes the washer pump/motor unit, but allows the wiper motor to operate for several additional wipe cycles before it de-energizes the wiper on/off relay and parks the wiper blades near the base of the windshield.
8R - 6 WIPERS/WASHERS WIPERS/WASHERS (Continued)
If the control knob is held depressed for more than about thirty seconds, the FCM will suspend washer pump/motor operation until the knob is released for about two seconds, then cycled back to the Wash position; however, the wipers will continue to operate for as long as the Wash switch is held closed. The FCM monitors the changing state of the wiper motor park switch through a hard wired wiper park switch sense circuit input. This input allows the FCM to count the number of wipe cycles that occur after the Wash switch is released, and to determine the proper interval at which to de-energize the wiper on/off relay to complete the wipe-after-wash mode cycle.
DIAGNOSIS AND TESTING - WIPER & WASHER SYSTEM
If the wiper motor operates, but the wipers do not move on the windshield, replace the faulty wiper module. If the washer pump/motor operates, but no washer fluid is dispensed on the glass; or, if the wip- ers operate, but chatter, lift, or do not clear the glass, clean and inspect the wiper and washer system com- ponents as required. (Refer to 8 - ELECTRICAL/ WIPERS/WASHERS - CLEANING) and (Refer to 8 - ELECTRICAL/WIPERS/WASHERS - INSPECTION). For diagnosis and testing of the multi-function switch (Refer to 8 - ELECTRICAL/LAMPS/LIGHT- ING - EXTERIOR/MULTI-FUNCTION SWITCH - DIAGNOSIS AND TESTING). Refer to the appropri- ate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connec- tors, splices and grounds.
The hard wired circuits and components of the wiper and washer system may be diagnosed and tested using conventional diagnostic tools and proce- dures. However, conventional diagnostic methods may not prove conclusive in the diagnosis of the instrument cluster, the Front Control Module (FCM), or the electronic message inputs to or outputs from the instrument cluster and the FCM that control the various wiper and washer system operating modes. The most reliable, efficient, and accurate means to diagnose the instrument cluster, the FCM, or the electronic message inputs and outputs related to the various wiper and washer system operating modes requires the use of a DRBIIIt scan tool. Refer to the appropriate diagnostic information.
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIRBAG, SEAT BELT TENSIONER,
DR
SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCON- NECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
THE
CLEANING - WIPER & WASHER SYSTEM
WIPER SYSTEM
cleaning of
the squeegees
The squeegees of wiper blades exposed to the ele- ments for a long time tend to lose their wiping effec- tiveness. Periodic is suggested to remove any deposits of salt or road film. The wiper blades, arms, and windshield glass should only be cleaned using a sponge or soft cloth and windshield washer fluid, a mild detergent, or a non- abrasive cleaner. If the wiper blades continue to leave streaks, smears, hazing, or beading on the glass after thorough cleaning of the squeegees and the glass, the entire wiper blade assembly must be replaced.
the rubber squeegees of
CAUTION: Protect the wiper blades from any petroleum-based cleaners, solvents, or contaminants. These products can rap- idly deteriorate the rubber squeegees.
WASHER SYSTEM
If the washer system is contaminated with foreign material, drain the washer reservoir by removing the washer pump/motor from the reservoir. Clean foreign material from the inside of the washer pump/motor inlet filter screen and the washer reservoir using clean washer fluid, a mild detergent, or a non-abra- sive cleaner. Flush foreign material from the washer system plumbing by first disconnecting the washer hoses from the washer nozzles, then running the washer pump/motor to run clean washer fluid or water through the system. Plugged or restricted washer nozzles should be carefully back-flushed using compressed air. If the washer nozzle obstruc- tion cannot be cleared, replace the washer nozzle.
CAUTION: Never introduce petroleum-based clean- ers, solvents, or contaminants into the washer sys- tem. These products can rapidly deteriorate the rubber seals and hoses of the washer system, as well as the rubber squeegees of the wiper blades.
WIPERS/WASHERS
8R - 7
the wiper blade with a new unit. Do not attempt to repair a wiper blade that is damaged.
DR WIPERS/WASHERS (Continued)
CAUTION: Never use compressed air to flush the washer system plumbing. Compressed air pres- sures are too great for the washer system plumbing components and will result in further system dam- age. Never use sharp instruments to clear a plugged washer nozzle or damage to the nozzle ori- fice and improper nozzle spray patterns will result.
INSPECTION - WIPER & WASHER SYSTEM
WIPER SYSTEM
The wiper blades and wiper arms should be inspected periodically, not just when wiper perfor- mance problems are experienced. This inspection should include the following points:
(1) Inspect the wiper arms for any indications of damage, or contamination. If the wiper arms are con- taminated with any foreign material, clean them as required. to 8 - ELECTRICAL/WIPERS/ WASHERS - CLEANING). If a wiper arm is damaged or corrosion is evident, replace the wiper arm with a new unit. Do not attempt to repair a wiper arm that is damaged or corroded.
(Refer
(2) Carefully lift the wiper blade off of the glass. Note the action of the wiper arm hinge. The wiper arm should pivot freely at the hinge, but with no lat- eral looseness evident. If there is any binding evident in the wiper arm hinge, or there is evident lateral play in the wiper arm hinge, replace the wiper arm.
CAUTION: Do not allow the wiper arm to spring back against the glass without the wiper blade in place or the glass may be damaged.
(3) Once proper hinge action of the wiper arm is confirmed, check the hinge for proper spring tension. Remove the wiper blade from the wiper arm. Either place a small postal scale between the blade end of the wiper arm and the glass, or carefully lift the blade end of the arm away from the glass using a small fish scale. Compare the scale readings between the right and left wiper arms. Replace a wiper arm if it has comparatively lower spring tension, as evi- denced by a lower scale reading.
(4) Inspect the wiper blades and squeegees for any indications of damage, contamination, or rubber dete- rioration (Fig. 2). If the wiper blades or squeegees are contaminated with any foreign material, clean them and the glass as required. (Refer to 8 - ELEC- TRICAL/WIPERS/WASHERS - CLEANING). After cleaning the wiper blade and the glass, if the wiper blade still fails to clear the glass without smearing, streaking, chattering, hazing, or beading, replace the wiper blade. Also, if a wiper blade is damaged or the squeegee rubber is damaged or deteriorated, replace
Fig.2WiperBladeInspection
1 - WORN OR UNEVEN EDGES 2 - ROAD FILM OR FOREIGN MATERIAL DEPOSITS 3 - HARD, BRITTLE, OR CRACKED 4 - DEFORMED OR FATIGUED 5 - SPLIT 6 - DAMAGED SUPPORT COMPONENTS
WASHER SYSTEM
The washer
system components
be inspected periodically, not just when washer perfor- mance problems are experienced. This inspection should include the following points:
should
(1) Check for ice or other foreign material in the washer reservoir. If contaminated, clean and flush the washer system. (Refer to 8 - ELECTRICAL/WIP- ERS/WASHERS - CLEANING).
(2) Inspect the washer plumbing for pinched, leak- ing, deteriorated, or incorrectly routed hoses and damaged or disconnected hose fittings. Replace dam- aged or deteriorated hoses and hose fittings. Leaking washer hoses can sometimes be repaired by cutting the hose at the leak and splicing it back together using an in-line connector fitting. Similarly, sections of deteriorated hose can be cut out and replaced by splicing in new sections of hose using in-line connec- tor fittings. Whenever routing a washer hose or a wire harness containing a washer hose, it must be routed away from hot, sharp, or moving parts. Also, sharp bends that might pinch the washer hose must be avoided.
8R - 8 WIPERS/WASHERS
CHECK VALVE DESCRIPTION
Fig.3CheckValve
1 - INLET NIPPLE 2 - CHECK VALVE 3 - OUTLET NIPPLE (2) 4 - FLOW DIRECTION ARROW
A single washer system check valve is standard equipment on this model, and is installed in the washer system plumbing (Fig. 3). The check valve is integral to the washer nozzle plumbing wye fitting located in the cowl plenum area beneath the cowl plenum cover/grille panel near the base of the wind- shield. The check valve consists of a molded plastic body with a raised arrowhead molded into its center section that the flow through the valve, and three barbed hose nipples formed in a wye configuration on the outside circum- ference of the center section of the valve body. The check valve cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
indicates the direction of
OPERATION
The check valve provides more than one function in this application. It serves as a wye connector fit- ting between the engine compartment and washer nozzle sections of the washer supply hose. It prevents washer fluid from draining out of the washer supply hoses back to the washer reservoir. This drain-back would result in a lengthy delay from when the washer switch is actuated until washer fluid was dis- pensed through the washer nozzles, because the washer pump would have to refill the washer plumb- ing from the reservoir to the nozzles. Such a drain- back condition could also result in water, dirt, or other outside contaminants being siphoned into the washer system through the washer nozzle orifice. This water could subsequently freeze and plug the
DR
nozzle, while other contaminants could interfere with proper nozzle operation and cause improper nozzle spray patterns. In addition, the check valve prevents washer fluid from siphoning through the washer noz- zles after the washer system is turned Off.
When the washer pump pressurizes and pumps washer fluid from the reservoir through the washer plumbing, the fluid pressure unseats a diaphragm from over a sump well within the valve by overriding the spring pressure applied to it by a piston (Fig. 4). With the diaphragm unseated, washer fluid is allowed to flow toward the two washer nozzles. When the washer pump stops operating, the spring pres- sure on the piston seats the diaphragm over the sump well in the valve and fluid flow in either direc- tion within the washer plumbing is prevented. The check valve cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
Fig.4CheckValve
1 - SPRING 2 - PISTON 3 - DIAPHRAGM 4 - TO WASHER NOZZLE 5 - FROM WASHER PUMP
REMOVAL
(1) Remove both wiper arms from the wiper pivots. to 8 - ELECTRICAL/WIPERS/WASHERS/
(Refer WIPER ARM - REMOVAL).
(2) Unlatch and open the hood. (3) Remove the cowl plenum cover/grille panel from over the cowl plenum. (Refer to 23 - BODY/EX- TERIOR/COWL GRILLE - REMOVAL).
(4) From the underside of the cowl plenum cover/ grille panel, disconnect the cowl plenum and washer nozzle hoses from the three barbed nipples of the check valve (Fig. 5).
(5) Remove the check valve from the underside of
the cowl plenum cover/grille panel.
DR CHECK VALVE (Continued)
WIPERS/WASHERS
8R - 9
Fig.5CheckValveRemove/Install
1 - WASHER NOZZLE HOSE (RIGHT) 2 - CHECK VALVE 3 - ROUTING CLIP 4 - COWL PLENUM WASHER HOSE 5 - COWL PLENUM COVER/GRILLE PANEL (UNDERSIDE) 6 - WASHER NOZZLE HOSE (LEFT)
INSTALLATION
(1) Position the check valve to the underside of the cowl plenum cover/grille panel (Fig. 5). Be certain that the flow direction arrow molded into the check valve body is oriented towards the washer nozzles.
(2) From the underside of the cowl plenum cover/ grille panel, reconnect the cowl plenum and washer nozzle hoses to the three barbed nipples of the check valve.
(3) Reinstall the cowl plenum cover/grille panel over the cowl plenum. (Refer to 23 - BODY/EXTERI- OR/COWL GRILLE - INSTALLATION).
(4) Close and latch the hood. (5) Reinstall both wiper arms onto the wiper piv- ots. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS/ WIPER ARM - INSTALLATION).
WASHER FLUID LEVEL SWITCH DESCRIPTION
The washer fluid level switch is a single pole, sin- gle throw reed-type switch mounted on the outboard side of the of the washer reservoir in the engine com- partment (Fig. 6). Only the molded plastic switch mounting flange and the integral connector recepta- cle are visible when the switch is installed in the res- ervoir. A short nipple formation extends from the inner surface of the switch mounting flange, and a barb on the nipple near the switch mounting flange is pressed through a rubber grommet seal installed in the mounting hole of the reservoir.
Fig.6WasherFluidLevelSwitch
1 - MOUNTING FLANGE 2 - BARBED NIPPLE 3 - FLOAT 4 - RESERVOIR 5 - GROMMET SEAL 6 - PIVOT 7 - MAGNET 8 - CONNECTOR RECEPTACLE
A small, molded plastic float has two pivot pins near its center that are snapped into two receptacles near the ends of two stanchions that extend toward the float from the switch nipple formation. A small magnet is secured within the end of the float nearest the switch nipple formation, and a reed switch is con- cealed within the nipple. A diagnostic resistor is con- nected between the two switch terminals within the switch mounting flange. The washer fluid level switch cannot be adjusted or repaired. If faulty or damaged, the switch must be replaced.
OPERATION
The washer fluid level switch uses a pivoting, oblong float to monitor the level of the washer fluid in the washer reservoir. The float contains a small magnet. When the float pivots, the proximity of this magnet to a stationary reed switch within the nipple formation of the switch changes. When the fluid level in the washer reservoir is at or above the float level, the float moves to a vertical position, the influence of the float magnetic field is removed from the reed switch, and the normally open reed switch contacts open. When the fluid level in the washer reservoir falls below the level of the pivoting float, the float moves to a horizontal position, the influence of the float magnetic field is applied to the reed switch, and the contacts of the normally open reed switch close.
8R - 10 WIPERS/WASHERS WASHER FLUID LEVEL SWITCH (Continued)
DR
The washer fluid level switch is connected to the vehicle electrical system through a dedicated take out and connector of the right (except V-10 and diesel engines) or left (V-10 and diesel engines only) head- lamp and dash wire harness. The switch is connected in series between a clean ground output of the Front Control Module (FCM) on a sensor return circuit and the washer fluid switch sense input to the FCM. When the switch closes, the FMC senses the ground on the washer fluid switch sense circuit. The FMC is programmed to respond to this input by sending an electronic washer fluid indicator lamp-on message to the instrument cluster over the Programmable Com- munications Interface (PCI) data bus. The instru- ment by illuminating the washer fluid indicator and by sound- ing an audible chime tone warning.
this message
responds
cluster
to
The washer fluid level switch may be diagnosed and tested using conventional diagnostic tools and procedures. However, conventional diagnostic meth- ods may not prove conclusive in the diagnosis of the instrument cluster, the Front Control Module (FCM), or the electronic message inputs to or outputs from the instrument cluster and the FCM that control the operation of the washer fluid visual and/or audible indicators. The most reliable, efficient, and accurate means to diagnose the washer fluid level indicator, the instrument cluster, the FCM, or the electronic message inputs and outputs related to the washer fluid indicator requires the use of a DRBIIIt scan tool. Refer to the appropriate diagnostic information.
REMOVAL
The washer fluid level switch can be removed from the washer reservoir without removing the reservoir from the vehicle.
(1) Unlatch and open the hood. (2) Disconnect and isolate the battery negative
cable.
(3) Disconnect the washer hose from the barbed outlet nipple of the washer pump/motor unit and allow the washer fluid to drain into a clean container for reuse.
(4) Disconnect the right (except V-10 and diesel engine) or left (V-10 and diesel engine only) head- lamp and dash wire harness connector for the washer fluid level switch from the switch connector recepta- cle (Fig. 7) or (Fig. 8).
NOTE: The pivoting float of the washer fluid level switch must be in a horizontal position within the reservoir in order to be removed. With the reservoir empty and in an upright position, the pivoting float will orient itself to the horizontal position when the switch connector receptacle is pointed straight upwards.
Fig.7WasherFluidLevelSwitchRemove/Install-
ExceptV-10&DieselEngine
1 - WASHER HOSE 2 - WASHER RESERVOIR 3 - WASHER FLUID LEVEL SWITCH 4 - WIRE HARNESS 5 - WASHER PUMP/MOTOR
Fig.8WasherFluidLevelSwitchRemove/Install-
V-10&DieselEngine
1 - WIRE HARNESS 2 - WASHER RESERVOIR 3 - WASHER PUMP/MOTOR 4 - WASHER HOSE 5 - WASHER FLUID LEVEL SWITCH
(5) Using a trim stick or another suitable wide flat-bladed tool, gently pry the barbed nipple of the washer fluid level switch out of the rubber grommet seal on the reservoir sump. Care must be taken not to damage the reservoir.
DR WASHER FLUID LEVEL SWITCH (Continued)
WIPERS/WASHERS
8R - 11
(6) Remove the washer fluid level switch from the
washer reservoir.
(7) Remove the rubber grommet seal
from the washer fluid level switch mounting hole in the washer reservoir and discard.
INSTALLATION
(1) Install a new rubber grommet seal
into the washer fluid level switch mounting hole in the washer reservoir. Always use a new rubber grommet seal on the reservoir.
(2) Insert the float of the washer fluid level switch through the rubber grommet seal and into the washer reservoir. The connector receptacle of the washer fluid level switch should be pointed upward. (3) Using hand pressure, press firmly and evenly on the washer fluid level switch mounting flange until the barbed nipple is fully seated in the rubber grommet seal in the washer reservoir mounting hole. (4) Reconnect the right (except V-10 and diesel engine) or left (V-10 and diesel engine only) head- lamp and dash wire harness connector for the washer fluid level switch to the switch connector receptacle (Fig. 7) or (Fig. 8).
(5) Reconnect the removed washer hose to the barbed outlet nipple of the washer pump/motor unit. (6) Refill the washer reservoir with the washer fluid drained from the reservoir during the removal procedure.
(7) Reconnect the battery negative cable. (8) Close and latch the hood.
WASHER HOSES/TUBES DESCRIPTION
The washer plumbing consists of a small diameter rubber reservoir washer hose that is routed from the barbed outlet nipple of the electric washer pump/mo- tor unit on the washer reservoir through a trough molded into the back of the reservoir above the washer pump and to the engine compartment washer hose (Fig. 9). On models equipped with an optional V-10 or diesel engine, the reservoir washer hose is routed through routing clips on the top of the radia- tor fan shroud from the washer reservoir on the left side of the radiator to the engine compartment washer hose on the right side of the radiator. The engine compartment washer hose is contained within the right headlamp and dash wire harness, which is routed through the engine compartment along the top of the right front fender wheel house to the dash panel.
The engine compartment washer hose is connected to the washer reservoir washer hose and to the cowl plenum washer hose with molded plastic in-line fit-
Fig.9EngineCompartmentWasherHose
1 - RIGHT FENDER 2 - RIGHT HEADLAMP & DASH WIRE HARNESS 3 - ENGINE COMPARTMENT WASHER HOSE (TO COWL PLENUM) 4 - COWL PLENUM WASHER HOSE 5 - ENGINE COMPARTMENT WASHER HOSE (TO WASHER RESERVOIR)
tings that have a barbed nipple on each end. The cowl plenum washer hose is routed from the engine compartment into the cowl plenum area through a trough formation located near the right end of the cowl plenum cover/grille panel. The cowl plenum washer hose is connected to the washer system check valve/wye fitting on the underside of the cowl plenum cover/grille panel. The cowl plenum washer hose and the two washer nozzle hoses are routed through inte- gral routing clips on the underside of the cowl ple- num cover/grille panel. The cowl plenum washer hose is connected to one nipple on the wye fitting and the two washer nozzle hoses are connected to the other two wye fitting nipples. The washer nozzle hoses are then routed along the underside of the cowl plenum cover/grille panel to the two washer nozzles.
Washer hose is available for service only as roll stock, which must then be cut to length. The molded plastic washer hose fittings cannot be repaired. If these fittings are faulty or damaged, they must be replaced.
OPERATION
Washer fluid in the washer reservoir is pressurized and fed by the washer pump/motor through the washer system plumbing and fittings to the two washer nozzles. Whenever routing the washer hose or a wire harness containing a washer hose, it must be routed away from hot, sharp, or moving parts; and, sharp bends that might pinch the hose must be avoided.
8R - 12 WIPERS/WASHERS
WASHER NOZZLE DESCRIPTION
Fig.10WasherNozzle
1 - HOOD 2 - LATCH (2) 3 - NIPPLE 4 - ANTI-ROTATION TAB 5 - ORIFICE
The two washer nozzles have integral snap fea- tures and an anti-rotation tab that secure them in dedicated holes in the cowl plenum cover/grille panel located near the base of the windshield (Fig. 10). The domed upper surface of the washer nozzle is visible on the top of the plenum cover/grille panel, and the nozzle orifice is oriented towards the windshield glass. The washer plumbing fittings for the washer nozzles are concealed beneath the cowl plenum cover/ grille panel. These fluidic washer nozzles are con- structed of molded plastic. The cowl plenum cover/ grille panel must be removed from the vehicle to access the nozzles for service. The washer nozzles cannot be adjusted or repaired. If faulty or damaged, they must be replaced.
OPERATION
The two washer nozzles are designed to dispense washer fluid into the wiper pattern area on the out- side of the windshield glass. Pressurized washer fluid is fed to each nozzle from the washer reservoir by the washer pump/motor unit through a single hose, which is attached to a barbed nipple on each washer nozzle below the cowl plenum cover/grille panel. A fluidic matrix within the washer nozzle causes the pressurized washer fluid to be emitted from the noz- zle orifice as an oscillating stream to more effectively cover a larger area of the glass to be cleaned.
DR
REMOVAL
(1) Remove both wiper arms from the wiper pivots. to 8 - ELECTRICAL/WIPERS/WASHERS/
(Refer WIPER ARM - REMOVAL).
(2) Unlatch and open the hood. (3) Remove the cowl plenum cover/grille panel from over the cowl plenum. (Refer to 23 - BODY/EX- TERIOR/COWL GRILLE - REMOVAL).
(4) From the underside of the cowl plenum cover/ grille panel, disconnect the washer nozzle hose from the barbed nipple of the washer nozzle (Fig. 11).
Fig.11WasherNozzleRemove/Install 1 - COWL PLENUM COVER/GRILLE PANEL (UNDERSIDE) 2 - ANTI-ROTATION TAB (LARGE) 3 - NIPPLE 4 - ANTI-ROTATION TAB (SMALL) 5 - PLIERS 6 - LATCH (2)
(5) From the underside of the cowl plenum cover/ grille panel, release the integral snap features of the washer nozzle and push the nozzle out through the mounting hole toward the top side of the cowl ple- num cover/grille panel.
(6) Remove the washer nozzle from the top of the
cowl plenum cover/grille panel.
INSTALLATION
(1) From the top of the cowl plenum cover/grille panel, position the nipple end of the washer nozzle through the mounting hole and engage the anti-rota- tion tab of the nipple into the anti-rotation notch in the mounting hole.
(2) Using hand pressure, push firmly and evenly on the top of the washer nozzle until the integral snap features lock into place on the underside of the cowl plenum cover/grille panel.
(3) From the underside of the cowl plenum cover/ grille panel, reconnect the washer hose to the barbed nipple of the washer nozzle (Fig. 11).
DR WASHER NOZZLE (Continued)
(4) Reinstall the washer hose for the washer noz- zle into its routing clips on the underside of the cowl plenum cover/grille panel.
(5) Reinstall the cowl plenum cover/grille panel over the cowl plenum. (Refer to 23 - BODY/EXTERI- OR/COWL GRILLE - INSTALLATION).
(6) Close and latch the hood. (7) Reinstall both wiper arms onto the wiper piv- ots. (Refer to 8 - ELECTRICAL/WIPERS/WASHERS/ WIPER ARM - INSTALLATION).
WASHER PUMP/MOTOR DESCRIPTION
Fig.12WasherPump/Motor
1 - MOTOR 2 - SNAP POST 3 - CONNECTOR RECEPTACLE 4 - PUMP 5 - OUTLET NIPPLE 6 - INLET NIPPLE 7 - FILTER SCREEN
The washer pump/motor unit (Fig. 12) is located on the rearward facing surface of the washer reservoir, in the right (except V-10 or diesel engine) or left (V-10 and diesel engine only) front corner of the engine compartment. A small permanently lubricated and sealed electric motor is coupled to the rotor-type washer pump. A seal flange with a barbed inlet nip- ple on the pump housing passes through a rubber grommet seal installed in a dedicated mounting hole of the washer reservoir. When the pump is installed in the reservoir a barbed outlet nipple on the pump
WIPERS/WASHERS
8R - 13
housing connects the unit to the washer system through a short washer reservoir hose.
The washer pump/motor unit is retained on the reservoir by the interference fit between the barbed pump inlet nipple and the grommet seal, which is a light press fit. The top of the washer pump is also secured to the washer reservoir by the use of a snap post on the motor housing and a snap post receptacle molded into the reservoir that allows for mounting of the washer pump without the use of fasteners. An integral connector receptacle on the top of the motor housing connects the unit to the vehicle electrical system. The washer pump/motor unit cannot be repaired. If faulty or damaged, the entire washer pump/motor unit must be replaced.
OPERATION
The washer pump/motor unit features a small Direct Current (DC) electric motor. The motor is con- nected to the vehicle electrical system through a sin- gle take out and two-cavity connector of the right (except V-10 or diesel engine) or left (V-10 or diesel engine only) headlamp and dash wire harness. The motor is grounded at all times through another take out of the right (except V-10 or diesel engine) or left (V-10 or diesel engine only) headlamp and dash wire harness. On models without the V-10 or diesel engine a single eyelet terminal connector is secured by a nut to a ground stud located on the right front fender inner shield in the engine compartment. On models with a V-10 or diesel engine an eyelet terminal con- nector is secured by a ground screw to the left front fender inner shield in the engine compartment. The motor receives battery current on a washer pump/ motor control circuit.
The washer pump/motor control circuit is energized through a high side driver within the Front Control Module (FCM) whenever the FCM receives an elec- tronic message requesting washer system operation from the instrument cluster over the Programmable Communications Interface (PCI) data bus. The instrument cluster monitors a resistor multiplexed hard wired input from the momentary washer switch contacts within the multi-function switch on the steering column to determine when it should issue the electronic message requesting washer system operation.
Washer fluid is gravity-fed from the washer reser- voir to the inlet side of the washer pump. When the pump motor is energized, the motor spins the rotor within the washer pump. The spinning pump rotor pressurizes the washer fluid and forces it through the pump outlet nipple, the washer plumbing, and the washer nozzles onto the windshield glass.
The washer pump/motor unit may be diagnosed using conventional diagnostic tools and methods.
DR
8R - 14 WIPERS/WASHERS WASHER PUMP/MOTOR (Continued)
However, conventional diagnostic methods may not prove conclusive in the diagnosis of the instrument cluster, the Front Control Module (FCM), or the elec- tronic message inputs to or outputs from the instru- ment cluster and the FCM that control the operation of the washer pump/motor unit. The most reliable, efficient, and accurate means to diagnose the washer pump/motor unit, the instrument cluster, the FCM, or the electronic message inputs and outputs related to the washer pump/motor unit operation requires the use of a DRBIIIt scan tool. Refer to the appro- priate diagnostic information.
REMOVAL
The washer pump/motor unit can be removed from the washer reservoir without removing the reservoir from the vehicle.
(1) Unlatch and open the hood. (2) Disconnect and isolate the battery negative
cable.
(3) Disconnect the washer hose from the barbed outlet nipple of the washer pump/motor unit and allow the washer fluid to drain into a clean container for reuse.
(4) Disconnect the right (except V-10 or diesel engine) or left (V-10 or diesel engine only) headlamp and dash wire harness connector for the washer pump/motor unit from the motor connector receptacle (Fig. 13).
(5) Firmly grasp the top of the washer pump/motor
housing.
(6) Pull lightly outward on the top of the washer pump/motor housing away from the washer reservoir far enough to disengage the snap post on the top of the motor from the receptacle in the reservoir.
(7) Pull the washer pump/motor unit straight out from the washer reservoir far enough to disengage the barbed pump inlet nipple from the rubber grom- met seal in the reservoir.
(8) Disconnect the reservoir washer hose from the
washer pump/motor unit outlet nipple.
(9) Remove washer pump/motor unit from the back
of the washer reservoir.
(10) Remove the rubber grommet seal from the
washer reservoir and discard.
INSTALLATION
(1) Install a new rubber grommet seal
into the washer pump mounting hole in the washer reservoir. Always use a new rubber grommet seal on the reser- voir.
(2) Position the barbed inlet nipple of the washer pump to the rubber grommet seal in the washer res- ervoir (Fig. 13).
Fig.13WasherPump/MotorRemove/Install
1 - CONNECTOR RECEPTACLE 2 - SNAP POST 3 - SNAP POST RECEPTACLE 4 - GROMMET SEAL 5 - WASHER FLUID LEVEL SWITCH 6 - WASHER RESERVOIR 7 - INLET NIPPLE 8 - OUTLET NIPPLE
(3) Using hand pressure, press on the washer pump/motor unit firmly and evenly until the barbed inlet nipple is fully seated in the rubber grommet seal in the washer reservoir mounting hole.
(4) Align the washer pump/motor snap post on the top of the motor housing with the snap post recepta- cle in the washer reservoir.
(5) Using hand pressure, press firmly and evenly on the top of washer pump/motor unit until the snap post snaps into the washer reservoir receptacle.
(6) Reconnect the washer reservoir hose to the
barbed outlet nipple of the washer pump.
the right
(7) Reconnect
(except V-10 or diesel engine) or left (V-10 or diesel engine only) headlamp and dash wire harness connector for the washer pump/motor unit to the motor connector receptacle.
(8) Refill the washer reservoir with the washer fluid drained from the reservoir during the removal procedure.
(9) Reconnect the battery negative cable. (10) Close and latch the hood.
DR
WIPERS/WASHERS
8R - 15
WASHER RESERVOIR DESCRIPTION
Fig.14WasherReservoir-exceptV-10&Diesel
Engine
1 - TOP TAB 2 - HOOK FEATURE 3 - CAP 4 - RESERVOIR 5 - TROUGH 6 - HOSE 7 - LOCK FEATURE 8 - WASHER FLUID LEVEL SWITCH 9 - WASHER PUMP/MOTOR 10 - BOTTOM TAB (2)
Except on models equipped with an optional V-10
or diesel engine, the molded plastic washer fluid res- ervoir is mounted on the right rearward facing sur- face of the cooling module radiator shroud in the engine compartment (Fig. 14). On models with the V-10 or diesel engine, the molded plastic washer fluid reservoir is mounted on the rearward facing surface of the left vertical member of the radiator support in the engine compartment. The reservoir is a molded unit constructed of a translucent plastic that allows the washer fluid level to be inspected without remov- ing the washer reservoir cap. The most visible com- ponent of the washer reservoir is the filler cap unit, which is secured to and hinges on a hook feature that is integral to the filler neck near the top of the reservoir. The bright yellow plastic filler cap snaps over the filler neck opening and seals the reservoiropening with an integral rubber gasket. The filler cap is labeled with an International Control and Dis- play Symbol icon for “Windshield Washer” and the text “Washer Fluid Only” that are molded into it and highlighted in black against the yellow plastic cap for visibility.
There are dedicated holes near the bottom of the rearward facing side of the reservoir provided for the mounting of the washer pump/motor unit and the washer fluid level switch. A snap post receptacle molded into the reservoir allows for mounting of the washer pump without the use of fasteners. The res- ervoir also features an integral hose routing trough on its rearward facing side. Except on models with a V-10 or diesel engine, the washer reservoir is secured to the cooling module radiator shroud with three integral tabs, two at the bottom and one at the top. The two bottom tabs are inserted into two slots near the bottom of the shroud, while the upper tab slides into an integral channel-like slot near the top of the shroud. A molded lock feature on the forward facing surface of the reservoir engages a molded depression on the rearward facing surface of the radiator shroud when the reservoir is fully seated on the shroud, locking the unit securely in place. On models with a V-10 or diesel engine, the washer reservoir is secured with two screws through integral mounting tabs to the left vertical member of the radiator support. On many models, a molded plastic coolant recovery con- tainer or a coolant pressure container must be detached from the top of the cooling module and moved aside to access the washer fluid reservoir for service. This may be accomplished without opening or draining the engine cooling system.
OPERATION
reservoir
The washer fluid reservoir provides a secure, on-vehicle storage location for a large reserve of washer fluid for operation of the washer system. The washer filler neck provides a clearly marked and readily accessible point from which to add washer fluid to the reservoir. The washer/pump motor unit is located in a sump area near the bottom of the reservoir to be certain that washer fluid will be available to the pump as the fluid level in the res- ervoir becomes depleted. The washer pump/motor unit is mounted in the lowest position in the sump. The washer fluid level switch is mounted just above the sump area of the reservoir so that there will be adequate warning to the vehicle operator that the washer fluid level is low, well before the washer sys- tem will no longer operate.
8R - 16 WIPERS/WASHERS WASHER RESERVOIR (Continued) REMOVAL
REMOVAL - EXCEPT V-10 OR DIESEL ENGINE
(1) Unlatch and open the hood. (2) Disconnect and isolate the battery negative
cable.
(3) Remove the fasteners securing the coolant recovery container or the coolant pressure container to the top of the cooling module and move the con- tainer aside. It is not necessary to open or drain the engine cooling system. (Refer to 7 - COOLING/EN- GINE/COOLANT REMOVAL) or (Refer to 7 - COOLING/ENGINE/ COOLANT RECOVERY PRESSURE CONTAINER - REMOVAL).
CONTAINER
RECOVERY
(4) Disconnect the reservoir washer hose from the barbed nipple of the inline fitting at the engine com- partment washer hose in the right headlamp and dash wire harness and allow the washer fluid to drain from the reservoir into a clean container for reuse (Fig. 15).
DR
(5) Disconnect the right headlamp and dash wire harness connector for the washer fluid level switch from the switch connector receptacle.
(6) Disconnect the right headlamp and dash wire harness connector for the washer pump/motor unit from the motor connector receptacle.
(7) Grasp the bottom of
the washer reservoir firmly with both hands and pull the unit sharply upward to disengage the locking feature on the washer reservoir from the depression in the radiator shroud.
(8) Continue lifting the washer reservoir upward far enough to disengage the three mounting tabs (one at the top and two at the bottom) from the channel- like slot at the top and the two slots at the bottom of the radiator shroud.
(9) Remove the washer reservoir from the right
side of the engine compartment.
REMOVAL - V-10 OR DIESEL ENGINE
(1) Unlatch and open the hood. (2) Disconnect and isolate the battery negative
cable.
(3) Disengage the reservoir washer hose from the integral routing clips on the top of the radiator fan shroud (Fig. 16).
Fig.15WasherReservoirRemove/Install
1 - TOP TAB 2 - RADIATOR SHROUD 3 - TOP SLOT 4 - RIGHT HEADLAMP & DASH WIRE HARNESS 5 - ENGINE COMPARTMENT WASHER HOSE 6 - BOTTOM SLOT (2) 7 - RESERVOIR WASHER HOSE 8 - BOTTOM TAB (2) 9 - WASHER FLUID LEVEL SWITCH 10 - WASHER PUMP/MOTOR 11 - WASHER RESERVOIR 12 - LOCK FEATURE
Fig.16WasherReservoirConnections-V-10&
DieselEngine
1 - WIRE HARNESS 2 - WASHER RESERVOIR 3 - WASHER PUMP/MOTOR 4 - WASHER HOSE 5 - WASHER FLUID LEVEL SWITCH
DR WASHER RESERVOIR (Continued)
WIPERS/WASHERS
8R - 17
(4) Reconnect the right headlamp and dash wire harness connector for the washer pump/motor unit to the motor connector receptacle.
(5) Reconnect the right headlamp and dash wire harness connector for the washer fluid level switch to the switch connector receptacle.
(6) Reconnect the reservoir washer hose to the barbed nipple of the inline fitting at the engine com- partment washer hose in the right headlamp and dash wire harness.
(7) Reposition the coolant recovery container or the coolant pressure container to the top of the cooling module and reinstall the fasteners that secure it there. (Refer to 7 - COOLING/ENGINE/COOLANT RECOVERY CONTAINER - INSTALLATION) or (Refer to 7 - COOLING/ENGINE/COOLANT RECOV- ERY PRESSURE CONTAINER - INSTALLATION).
(8) Refill the washer reservoir with the washer fluid drained from the reservoir during the removal procedure.
(9) Reconnect the battery negative cable. (10) Close and latch the hood.
INSTALLATION - V-10 OR DIESEL ENGINE
(1) Position the washer reservoir into the left side
of the engine compartment (Fig. 17).
(2) Install and tighten the two screws that secure the washer reservoir to the left vertical member of the radiator support. Tighten the screws to 10 N·m (85 in. lbs.).
(3) Reconnect the left headlamp and dash wire harness connector for the washer pump/motor unit to the motor connector receptacle (Fig. 16).
(4) Reconnect the left headlamp and dash wire harness connector for the washer fluid level switch to the switch connector receptacle.
(5) Reconnect the reservoir washer hose to the barbed nipple of the inline fitting at the engine com- partment washer hose in the right headlamp and dash wire harness.
(6) Engage the reservoir washer hose into the inte- gral routing clips on the top of the radiator fan shroud.
(7) Refill the washer reservoir with the washer fluid drained from the reservoir during the removal procedure.
(8) Reconnect the battery negative cable. (9) Close and latch the hood.
(4) Disconnect the reservoir washer hose from the barbed nipple of the inline fitting at the engine com- partment washer hose in the right headlamp and dash wire harness and allow the washer fluid to drain from the reservoir into a clean container for reuse.
(5) Disconnect the left headlamp and dash wire harness connector for the washer fluid level switch from the switch connector receptacle.
(6) Disconnect the left headlamp and dash wire harness connector for the washer pump/motor unit from the motor connector receptacle.
(7) Remove the two screws that secure the washer reservoir to the left vertical member of the radiator support (Fig. 17).
Fig.17WasherReservoirRemove/Install-V-10&
DieselEngine
1 - RESERVOIR WASHER HOSE 2 - RADIATOR SUPPORT 3 - SCREW (2) 4 - WASHER RESERVOIR
(8) Remove the washer reservoir from the left side
of the engine compartment.
INSTALLATION
INSTALLATION - EXCEPT V-10 OR DIESEL ENGINE
(1) Position the washer reservoir into the right
side of the engine compartment.
(2) Align and insert the three mounting tabs (one at the top and two at the bottom) into the two slots at the bottom and the channel-like slot at the top of the radiator shroud (Fig. 15).
(3) Place both hands on the top of the washer res- ervoir and push the unit downward far enough for the locking feature on the washer reservoir to snap into the depression in the radiator shroud.
8R - 18 WIPERS/WASHERS
DR
WIPER ARM DESCRIPTION
Fig.18WiperArm
1 - HOOK 2 - STRAP 3 - PIVOT END 4 - KEY 5 - LATCH 6 - HINGE PIN 7 - TENSION SPRING 8 - CHANNEL
The wiper arms are the rigid members located between the wiper pivots that protrude from the cowl plenum cover/grille panel near the base of the wind- shield and the wiper blades on the windshield glass (Fig. 18). These wiper arms feature an over-center hinge that allows easy access to the windshield glass for cleaning. The wiper arm has a die cast metal pivot end with a large internally serrated socket for- mation at one end. A key within the socket formation indexes the wiper arm to a keyway in the pivot shaft of the wiper module to provide wiper alignment, and a spring-loaded latch on the underside of the wiper arm pivot end locks the unit to the pivot shaft when it is fully installed. The right and left wiper arms for this model are not interchangeable, as the right wiper arm is slightly longer than the left one.
The wide end of a tapered, stamped steel channel hinges on and is secured with a hinge pin to the blade end of the wiper arm pivot end. One end of a long, rigid, stamped steel strap, with a small hole near its pivot end, is riveted and crimped within the narrow end of the stamped steel channel. The tip of the wiper blade end of this strap is bent back under itself to form a small hook. Concealed within the stamped steel channel, one end of a long spring is engaged with a wire hook on the underside of the die cast pivot end, while the other end of the spring is hooked through the small hole in the steel strap. The
entire wiper arm has a satin black finish applied to all of its visible surfaces.
A wiper arm cannot be adjusted or repaired. If damaged or faulty, the entire wiper arm unit must be replaced.
OPERATION
The wiper arms are designed to mechanically transmit the motion from the wiper pivots to the wiper blades. The wiper arm must be properly indexed to the wiper pivot in order to maintain the proper wiper blade travel on the glass. The serrated and keyed socket formation in the wiper arm pivot end interlocks with the serrations and keyway on the outer circumference of the wiper pivot shaft, provid- ing positive engagement and alignment of this con- nection. The latch positively locks the wiper arm to the wiper pivot shaft when the arm is fully installed. The spring-loaded wiper arm hinge controls the down-force applied through the tip of the wiper arm to the wiper blade on the glass. The hook formation on the tip of the wiper arm provides a cradle for securing and latching the wiper blade pivot block to the wiper arm.
REMOVAL
(1) Lift the wiper arm to its over-center position to hold the wiper blade off of the glass and relieve the spring tension on the wiper arm to wiper pivot shaft connection.
(2) Pull the latch on the pivot end of the wiper
arm outward (Fig. 19).
Fig.19WiperArmRemove/Install
1 - WIPER ARM PIVOT END 2 - LATCH
(3) Remove the wiper arm pivot end from the
wiper pivot shaft.
DR WIPER ARM (Continued) INSTALLATION
The right and left wiper arms are not interchange- able. The right wiper arm is slightly longer than the left. Be certain that each wiper arm is installed on the proper wiper pivot.
(1) Place the wiper arm hinge in its over-center
position prior to attempting installation.
(2) The wiper arms are indexed to the wiper pivot shafts with integral keys in the wiper arm pivot ends and keyways in the wiper pivot shafts. Align the key of the wiper arm to the keyway on the wiper pivot shaft.
(3) Once the wiper blade is aligned, push the pivot of the wiper arm down firmly and evenly over the wiper pivot shaft until it is fully engaged. When the wiper arm is fully engaged on the wiper pivot, the spring-loaded latch (Fig. 19) will snap back into place against the wiper arm pivot end.
(4) Gently lower the wiper arm until the wiper
blade is in position on the windshield glass.
WIPER BLADE DESCRIPTION
WIPERS/WASHERS
8R - 19
† Superstructure - The superstructure includes several stamped steel bridges and links with claw formations that grip the wiper blade element. Also included in this unit is the latching, molded plastic pivot block that secures the superstructure to the wiper arm. All of the metal components of the wiper blade have a satin black finish applied. † Element - The wiper element or squeegee is the resilient rubber member of the wiper blade that con- tacts the glass. † Flexor - The flexor is a rigid metal component running along the length of each side of the wiper element where it is gripped by the claws of the superstructure.
All models have two 60.00 centimeter (23.62 inch) long wiper blades with non-replaceable rubber ele- ments (squeegees). The wiper blades cannot be adjusted or repaired. If faulty, worn, or damaged the entire wiper blade unit must be replaced.
OPERATION
The wiper blades are moved back and forth across the glass by the wiper arms when the wipers are being operated. The wiper blade superstructure is the flexible frame that grips the wiper blade element and evenly distributes the force of the spring-loaded wiper arm along the length of the element. The com- bination of the wiper arm force and the flexibility of the superstructure makes the element conform to and maintain proper contact with the glass, even as the blade is moved over the varied curvature that may be encountered across the glass surface. The wiper element flexor provides the claws of the blade superstructure with a rigid, yet flexible component on the element which can be gripped. The rubber ele- ment is designed to be stiff enough to maintain an even cleaning edge as it is drawn across the glass, yet resilient enough to conform to the glass surface and flip from one cleaning edge to the other each time the wiper blade changes directions.
Fig.20WiperBlade
REMOVAL
1 - SUPERSTRUCTURE 2 - ELEMENT 3 - PIVOT BLOCK 4 - RELEASE TAB 5 - PIVOT PIN 6 - CLAWS 7 - FLEXOR
Each wiper blade is secured by an integral latching pivot block to the hook formation on the tip of each wiper arm, and rests on the glass near the base of the windshield when the wipers are not in operation (Fig. 20). The wiper blade consists of the following components:
NOTE: The notched end of the wiper element flexor should always be oriented towards the end of the wiper blade that is nearest to the wiper pivot.
(1) Lift the wiper arm to raise the wiper blade and element off of the glass, until the wiper arm hinge is in its over-center position.
(2) To remove the wiper blade from the wiper arm, depress the pivot block latch release tab under the tip of the arm and slide the blade away from the tip towards the pivot end of the arm far enough to dis- engage the pivot block from the hook formation on the end of the arm (Fig. 21).
8R - 20 WIPERS/WASHERS WIPER BLADE (Continued)
DR
WIPER HIGH/LOW RELAY DESCRIPTION
Fig.21WiperBladeRemove/Install
1 - SUPERSTRUCTURE 2 - WIPER ARM 3 - PIVOT BLOCK 4 - RELEASE TAB 5 - HOOK 6 - ELEMENT
(3) Extract the hook formation on the tip of the wiper arm through the opening in the wiper blade superstructure just ahead of the wiper blade pivot block/latch unit.
CAUTION: Do not allow the wiper arm to spring back against the glass without the wiper blade in place or the glass may be damaged.
(4) Gently lower the tip of the wiper arm onto the
glass.
INSTALLATION
NOTE: The notched end of the wiper element flexor should always be oriented towards the end of the wiper blade that is nearest to the wiper pivot.
(1) Lift the wiper arm off of the windshield glass, until the wiper arm hinge is in its over-center position. (2) Position the wiper blade near the hook forma- tion on the tip of the arm with the notched end of the wiper element flexor oriented towards the end of the wiper arm that is nearest to the wiper pivot.
(3) Insert the hook formation on the tip of the wiper arm through the opening in the wiper blade superstructure ahead of the wiper blade pivot block/ latch unit far enough to engage the pivot block into the hook (Fig. 21).
(4) Slide the wiper blade pivot block/latch up into the hook formation on the tip of the wiper arm until the latch release tab snaps into its locked position. Latch engagement will be accompanied by an audible click.
(5) Gently lower the wiper blade onto the glass.
Fig.22ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
The wiper high/low relay is located in the Inte- grated Power Module (IPM) in the engine compart- ment near the battery. The wiper high/low relay is a conventional International Standards Organization (ISO) micro relay (Fig. 22). Relays conforming to the ISO specifications have common physical dimensions, current capacities, terminal patterns, and terminal functions. The relay is contained within a small, rect- angular, molded plastic housing and is connected to all of the required inputs and outputs by five integral
