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1.7
The speed control servo cable is connected between the speed control vacuum servo diaphragm and the throttle body control linkage. This cable is used with 3.7L/4.7L/5.9L/8.0L gas powered engines only. It is also used if equipped with a 5.9L diesel engine equipped with an automatic transmission.
A speed control servo cable is not used if equipped with either a 5.9L diesel engine equipped with a manual transmission, or any 5.7L engine/transmis- sion combinations.
Ft. Lbs.
In. Lbs.
60
30
15
20
OPERATION
This cable causes the throttle control linkage to open or close the throttle valve in response to move- ment of the vacuum servo diaphragm.
REMOVAL
3.7L / 4.7L GAS
(1) Disconnect negative battery cable at battery. (2) Remove air intake tube at top of throttle body. The accelerator cable must be partially removed to
gain access to speed control cable.
SPEED CONTROL
8P - 4
CABLE (Continued)DR
(3) Hold throttle in wide open position. While held in this position, slide throttle cable pin (Fig. 1) from throttle body bellcrank.
(4) Using a pick or small screwdriver, press release tab (Fig. 2) to release plastic cable mount from bracket. Press on tab only enough to release cable from bracket. If tab is pressed too much, it will be broken. Slide plastic mount (Fig. 2) towards right side of vehicle to remove throttle cable from throttle body bracket.
(5) Using finger pressure only, disconnect servo cable connector (Fig. 3) at throttle body bellcrank pin by pushing connector off bellcrank pin towards front of vehicle. DO NOT try to pull connector off per- pendicular to the bellcrank pin. Connector will be broken.
(6) Slide speed control cable plastic mount towards right of vehicle to remove cable from throttle body bracket (Fig. 4).
(7) Remove servo cable from servo. Refer to Servo
Removal/Installation.
Fig.2THROTTLECABLERELEASETAB-3.7L/
4.7L
1 - THROTTLE CABLE 2 - RELEASE TAB 3 - PICK OR SCREWDRIVER 4 - PLASTIC CABLE MOUNT
Fig.1THROTTLECABLEPIN-3.7L/4.7L
1 - THROTTLE CABLE PIN 2 - THROTTLE BODY BELLCRANK 3 - PUSH UP HERE
5.9L Gas
(1) Disconnect negative battery cable at battery. (2) Remove air intake tube at top of throttle body. (3) Using finger pressure only, remove speed con- trol cable connector at bellcrank by pushing connec- tor rearward off the bellcrank pin (Fig. 5). DO NOT try to pull connector off perpendicular to the bellcrank pin. Connector will be broken.
(4) Squeeze 2 tabs on sides of speed control cable at throttle body mounting bracket (locking plate) and push out of bracket.
Fig.3SPEEDCONTROLCABLEATBELLCRANK-
3.7L/4.7L
1 - THROTTLE BODY BELLCRANK 2 - SPEED CONTROL CABLE CONNECTOR
(5) Remove servo cable from servo. Refer to Speed
Control Servo Removal/Installation in this group.
DR CABLE (Continued)
SPEED CONTROL
8P - 5
Fig.5SERVOCABLEATTHROTTLEBODY-5.9L
1 - VEHICLE SPEED CONTROL CABLE
GAS
8.0L Gas
Fig.4SPEEDCONTROLCABLEATBRACKET-3.7L
/4.7L
1 - THROTTLE CABLE BRACKET 2 - PLASTIC CABLE MOUNT 3 - SPEED CONTROL CABLE
(1) Disconnect negative battery cable at battery. (2) Using finger pressure only, remove speed con- trol cable connector at bellcrank by pushing connec- tor off the bellcrank pin (Fig. 6). DO NOT try to pull to the bellcrank pin. Connector will be broken.
off perpendicular
connector
(3) Squeeze 2 tabs on sides of speed control cable at throttle body mounting bracket (locking plate) and push out of bracket.
Fig.6SERVOCABLEATTHROTTLEBODY—8.0LV-10ENGINE
1 - THROTTLE CABLE 2 - THROTTLE VALVE CABLE 3 - SPEED CONTROL SERVO CABLE
SPEED CONTROL
8P - 6
CABLE (Continued)(4) Remove servo cable from servo. Refer to Speed
Control Servo Removal/Installation in this group.
5.9L Diesel — Auto. Trans.
(1) Disconnect both negative battery cables at both
batteries.
(2) Remove
cable/lever/linkage
cover. Refer
to
Speed Control Servo Removal/Installation.
(3) Remove (disconnect) servo cable from servo.
Refer to Speed Control Servo Removal/Installation.
(4) Using finger pressure only, disconnect end of servo cable from throttle lever pin by pulling forward on connector while holding lever rearward (Fig. 7). DO NOT try to pull connector off perpendicular to lever pin. Connector will be broken.
(5) Squeeze 2 pinch tabs (Fig. 7) on sides of speed control cable at mounting bracket and push cable rearward out of bracket.
(6) Remove cable from vehicle.
Fig.7SERVOCABLEATTHROTTLELEVER—5.9L
DIESEL
1 - PINCH (2) TABS 2 - CABLE MOUNTING BRACKET 3 - PINCH TABS (2) 4 - OFF 5 - THROTTLE CABLE 6 - THROTTLE LEVER 7 - THROTTLE LEVER PIN 8 - OFF 9 - CONNECTOR 10 - SPEED CONTROL CABLE
INSTALLATION
3.7L / 4.7L Gas
(1) Install end of cable to speed control servo.
Refer to Servo Removal/Installation.
(2) Slide speed control cable plastic mount into
throttle body bracket.
DR
(3) Install speed control cable connector onto throt- tle body bellcrank pin (push rearward to snap into location).
(4) Slide throttle (accelerator) cable plastic mount into throttle body bracket. Continue sliding until cable release tab is aligned to hole in throttle body mounting bracket.
(5) While holding throttle to wide open position, place throttle cable pin into throttle body bellcrank. (6) Install air intake tube to top of throttle body. (7) Connect negative battery cable at battery. (8) Before starting engine, operate accelerator
pedal to check for any binding.
5.9L / 8.0L Gas
(1) Install end of cable to speed control servo.
Refer to Speed Control Servo Removal/Installation.
(2) Install
cable
into
throttle body mounting
bracket. Cable snaps into bracket.
(3) Install speed control cable connector at throttle
body bellcrank pin. Connector snaps onto pin.
(4) Install air intake tube to top of throttle body
(except 8.0L).
(5) Connect negative battery cable to battery. (6) Before starting engine, operate accelerator
pedal to check for any binding.
5.9L Diesel — Auto. Trans.
(1) Install
(connect) end of speed control servo cable to speed control servo. Refer to Speed Control Servo Removal/Installation.
(2) Install cable through mounting hole on mount-
ing bracket. Cable snaps into bracket.
(3) Connect servo cable to throttle lever by push- ing cable connector rearward onto lever pin while holding lever forward.
(4) Connect negative battery cables to both batteries. (5) Before starting engine, operate accelerator
pedal to check for any binding.
(6) Install cable/lever cover.
SERVO DESCRIPTION
A speed control servo is not used with any 5.7L V-8 engine, or with the 5.9L diesel engine when equipped with a manual transmission.
The speed control servo is attached to the bottom
of the battery tray.
The servo unit consists of a solenoid valve body, and a vacuum chamber. The solenoid valve body con- tains three solenoids:
† Vacuum † Vent † Dump
DR SERVO (Continued)
The vacuum chamber contains a diaphragm with a
cable attached to control the throttle linkage.
OPERATION
A speed control servo is not used with any 5.7L V-8 engine, or with the 5.9L diesel engine when equipped with a manual transmission.
The Powertrain Control Module (PCM) controls the solenoid valve body. The solenoid valve body controls the application and release of vacuum to the dia- phragm of the vacuum servo. The servo unit cannot be repaired and is serviced only as a complete assem- bly.
Power is supplied to the servo’s by the PCM through the brake switch. The PCM controls the ground path for the vacuum and vent solenoids.
The dump solenoid is energized anytime it receives power. If power to the dump solenoid is interrupted, the solenoid dumps vacuum in the servo. This pro- vides a safety backup to the vent and vacuum sole- noids.
The vacuum and vent solenoids must be grounded at the PCM to operate. When the PCM grounds the vacuum servo solenoid, the solenoid allows vacuum to enter the servo and pull open the throttle plate using the cable. When the PCM breaks the ground, the solenoid closes and no more vacuum is allowed to enter the servo. The PCM also operates the vent sole- noid via ground. The vent solenoid opens and closes a passage to bleed or hold vacuum in the servo as required.
The PCM duty cycles the vacuum and vent sole- noids to maintain the set speed, or to accelerate and decelerate the vehicle. To increase throttle opening, the PCM grounds the vacuum and vent solenoids. To decrease throttle opening, the PCM removes the grounds from the vacuum and vent solenoids. When the brake is released, if vehicle speed exceeds 30
mph to resume, 35 mph to set, and the RES/ACCEL switch has been depressed, ground for the vent and vacuum circuits is restored.REMOVAL
The speed control servo assembly is attached to the
bottom of the battery tray (Fig. 8).
(1) Disconnect negative battery cable at battery
(both cables at both batteries if diesel).
(2) To gain access to servo, remove plastic wheel-
house splash shield over left-front wheel.
(3) Disconnect vacuum line at servo (Fig. 8). (4) Disconnect electrical connector at servo (Fig. 8). (5) Remove 3 servo mounting screws (Fig. 8). Depending on engine application, different sets of mounting lugs (Fig. 8) are used to support servo to battery tray. While removing, note proper lugs.
SPEED CONTROL
8P - 7
(6) Disconnect servo cable at throttle body. Refer to
Servo Cable Removal/Installation.
(7) Remove 2 mounting nuts holding servo cable
sleeve to bracket (Fig. 9).
(8) Pull speed control cable sleeve and servo away from servo mounting bracket to expose cable retain- ing clip (Fig. 9) and remove clip. Note: The servo mounting bracket displayed in (Fig. 9) is a typical bracket and may/may not be applicable to this model vehicle.
(9) Remove servo from mounting bracket. While
removing, note orientation of servo to bracket.
Fig.8SPEEDCONTROLSERVOLOCATION
1 - BATTERY TRAY 2 - MOUNTING LUGS 3 - SERVO 4 - ELEC. CONNEC. 5 - MOUNTING SCREWS (3) 6 - MOUNTING BRACKET 7 - VACUUM LINE
INSTALLATION
(1) Position servo to mounting bracket (Fig. 9). (2) Align hole in cable connector with hole in servo
pin. Install cable-to-servo retaining clip (Fig. 9).
(3) Insert servo mounting studs through holes in
servo mounting bracket.
(4) Install 2 servo-to-mounting bracket nuts and
tighten. Refer to torque specifications.
(5) Position servo assembly to correct mounting lugs on battery tray (Fig. 8) and install 3 screws. Tighten 3 screws. Refer to torque specifications.
(6) Connect vacuum line at servo. (7) Connect electrical connector at servo.
SPEED CONTROL
8P - 8
SERVO (Continued)DR
OPERATION
When speed control is selected by depressing the ON, OFF switch, the PCM (ECM for diesel) allows a set speed to be stored in its RAM for speed control. To store a set speed, depress the SET switch while the vehicle is moving at a speed between approxi- mately 35 and 85 mph. In order for the speed control to engage, the brakes cannot be applied, nor can the gear selector be indicating the transmission is in Park or Neutral.
the following conditions:
The speed control can be disengaged manually by: † Stepping on the brake pedal † Depressing the OFF switch † Depressing the CANCEL switch. The speed control can be disengaged also by any of † An indication of Park or Neutral † The VSS signal increases at a rate of 10 mph per second (indicates that the co-efficient of friction between the road surface and tires is extremely low) † Depressing the clutch pedal. † Excessive engine rpm (indicates that the trans- † The VSS signal decreases at a rate of 10 mph per second (indicates that the vehicle may have decelerated at an extremely high rate) † If the actual speed is not within 20 mph of the
mission may be in a low gear)
set speed
The previous disengagement conditions are pro-
grammed for added safety.
Once the speed control has been disengaged, depressing the ACCEL switch restores the vehicle to the target speed that was stored in the PCM’s RAM (ECM for diesel).
NOTE: Depressing the OFF switch will erase the set speed stored in the PCM’s RAM.
If, while the speed control is engaged, the driver wishes to increase vehicle speed, the PCM (ECM for diesel) is programmed for an acceleration feature. With the ACCEL switch held closed, the vehicle accelerates slowly to the desired speed. The new tar- get speed is stored in the PCM’s RAM when the ACCEL switch is released. The PCM also has a 9tap- up9 feature in which vehicle speed increases at a rate of approximately 2 mph for each momentary switch activation of the ACCEL switch.
The PCM also provides a means to decelerate with- out disengaging speed control. To decelerate from an existing recorded target speed, depress and hold the COAST switch until the desired speed is reached. Then release the switch. The ON, OFF switch oper- ates two components: the PCM’s ON, OFF input, and the battery voltage to the brake switch.
Fig.9SERVOCABLECLIPREMOVE/INSTALL—
TYPICAL
1 - SERVO MOUNTING NUTS (2) 2 - SERVO 3 - CABLE RETAINING CLIP 4 - SERVO CABLE AND SLEEVE
(8) Connect servo cable to throttle body. Refer to
servo Cable Removal/Installation.
(9) Install left-front wheel-well liner. (10) Connect negative battery cable to battery
(connect both cables if diesel).
(11) Before starting engine, operate accelerator
pedal to check for any binding.
SWITCH DESCRIPTION
Two separate switch pods operate the speed control system. The steering-wheel-mounted switches use multiplexed circuits to provide inputs to the PCM (to the ECM for diesel) for ON, OFF, RESUME, ACCEL- ERATE, SET, DECEL and CANCEL modes. Refer to the owner’s manual for more information on speed control switch functions and setting procedures.
The individual switches cannot be repaired. If one the entire switch module must be
switch fails, replaced.
Depending on engine control computer (JTEC having a 3– plug connector or NGC having a 4– plug connector), 2 types of switches are used. Both types of switches are internally and exter- nally different. The switch used with the NGC system has an attached pigtail lead. The switch used with the JTEC system does not have an attached pigtail lead.
DR SWITCH (Continued) REMOVAL
Depending on engine control computer (JTEC having a 3–plug connector or 5.7L V-8 NGC hav- ing a 4–plug connector), 2 types of switches are used. Both types of switches are internally and externally different. The switches used with the NGC system have attached pigtail leads (Fig. 11). The switch used with the JTEC system does not have an attached pigtail lead.
(1) Remove switch mounting screw (Fig. 10). or
(Fig. 11)
(2) Pull switch from steering wheel. (3) Unplug electrical connector from switch (Fig. 10), or, switch pigtail wire harness from steering wheel wire harness (Fig. 11) and remove switch.
Fig.10SPEEDCONTROLSWITCHES(EXCEPT5.7L
V-8ENGINE)
1 - ELECTRICAL CONNECTORS 2 - MOUNTING SCREWS 3 - RIGHT SWITCH 4 - LEFT SWITCH
INSTALLATION
(1) Plug electrical connector into switch (Fig. 10), or connect pigtail wire harness to steering wheel wire harness (Fig. 11). Be sure wires are not pinched.
(2) Position switch to steering wheel. (3) Install switch mounting screw and tighten.
Refer to torque specifications.
SPEED CONTROL
8P - 9
Fig.11SPEEDCONTROLSWITCHES(WITH5.7LV-8
ENGINE)
1 - MOUNTING SCREWS 2 - RIGHT SWITCH 3 - LEFT SWITCH 4 - PIGTAIL LEADS
VACUUM RESERVOIR DESCRIPTION
The vacuum reservoir is a plastic storage tank con- nected to an engine vacuum source by vacuum lines. A vacuum reservoir is not used with diesel engines or the 5.7L gas powered engine.
OPERATION
The vacuum reservoir is used to supply the vac- uum needed to maintain proper speed control opera- tion when engine vacuum drops, such as in climbing a grade while driving. A one-way check valve is used in the vacuum line between the reservoir and the vacuum source. This check valve is used to trap engine vacuum in the reservoir. On certain vehicle applications, this reservoir is shared with the heat- ing/air-conditioning system. The vacuum reservoir cannot be repaired and must be replaced if faulty.
DIAGNOSIS AND TESTING - VACUUM RESERVOIR
(1) Disconnect vacuum hose at speed control servo and install a vacuum gauge into the disconnected hose.
SPEED CONTROL
8P - 10
VACUUM RESERVOIR (Continued)DR
(2) Start engine and observe gauge at idle. Vac- uum gauge should read at least ten inches of mer- cury.
(3) If vacuum is less than ten inches of mercury, leak. Check vacuum line to determine source of engine for leaks. Also check actual engine intake manifold vacuum. If manifold vacuum does not meet this requirement, check for poor engine performance and repair as necessary.
(4) If vacuum line to engine is not leaking, check for leak at vacuum reservoir. To locate and gain access to reservoir, refer to Vacuum Reservoir Remov- al/Installation in this group. Disconnect vacuum line at reservoir and connect a hand-operated vacuum pump to reservoir fitting. Apply vacuum. Reservoir vacuum should not bleed off. If vacuum is being lost, replace reservoir.
(5) Verify operation of one-way check valve and leaks. Certain models may be
check it equipped with 2 check-valves.
for
(a) Locate one-way check valve. The valve is located in vacuum line between vacuum reservoir and engine vacuum source. Disconnect vacuum hoses (lines) at each end of valve.
(b) Connect a hand-operated vacuum pump to reservoir end of check valve. Apply vacuum. Vac- uum should not bleed off. If vacuum is being lost, replace one-way check valve.
(c) Connect a hand-operated vacuum pump to vacuum source end of check valve. Apply vacuum. Vacuum should flow through valve. If vacuum is not flowing, replace one-way check valve. Seal the fitting at opposite end of valve with a finger and apply vacuum. If vacuum will not hold, diaphragm within check valve has ruptured. Replace valve.
REMOVAL
The vacuum reservoir is located in the engine com- partment under the fresh air cowl grill panel (Fig. 12).
(1) Remove wiper blades and arms. Refer to Wiper Arm Removal / Installation in the Wipers / Washers section.
(2) Remove fresh air cowl grill. Refer to Cowl Grill
Removal / Installation.
(3) Disconnect vacuum line at reservoir (Fig. 13). (4) Remove 2 reservoir mounting nuts (Fig. 13). (5) Remove reservoir from cowl.
INSTALLATION
(1) Position reservoir onto 2 weld studs (Fig. 13). (2) Install 2 mounting nuts and tighten. Refer to
torque specifications.
(3) Connect vacuum line to reservoir fitting. (4) Install cowl grill. Refer to Cowl Grill Removal /
Installation.
Fig.12VACUUMRESERVOIRLOCATION
1 - COWL GRILL 2 - WIPER ARMS / BLADES 3 - VACUUM RESERVOIR
Fig.13VACUUMRESERVOIRREMOVAL/
INSTALLATION
1 - COWL (BELOW WIPER ARMS) 2 - VACUUM LINE CONNECTION 3 - MOUNTING NUTS (2) 4 - VACUUM RESERVOIR 5 - WELDED STUDS
(5) Install wiper arms / blades. Refer to Wiper Arm
Removal / Installation.
DR
VEHICLE THEFT SECURITY
8Q - 1
VEHICLE THEFT SECURITY
TABLE OF CONTENTS
page
page
VEHICLE THEFT SECURITY
DESCRIPTION
DESCRIPTION SENTRY KEY IMMOBILIZER SYSTEM (SKIS) DESCRIPTION
. . . . . . . . . . . . . . . . . . . . . . . . 1
. 1
. . . . . . . . . . . . . . . . . . . . . . . . 1OPERATION
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 2DIAGNOSIS AND TESTING
VEHICLE THEFT SECURITY SYSTEM . . . . . . 3
VEHICLE THEFT SECURITY
DESCRIPTION
DESCRIPTION
The Vehicle Theft/Security System (VTSS)
is designed to protect against whole vehicle theft. The system monitors the vehicle doors and ignition for unauthorized operation. The VTSS activates: † Sounding of the horn † Flashing of the park lamps † Flashing of the head lamps The Remote Keyless Entry (RKE) has 1 mode of operation, CUSTOMER USAGE mode. The cus- tomer usage mode provides full functionality of the module and is the mode in which the RKE module should be operating when used by the customer.
SENTRY KEY IMMOBILIZER SYSTEM (SKIS) The Sentry Key Immobilizer System (SKIS)
is designed to provide passive protection against unau- thorized vehicle use by preventing the engine from operating while the system is armed. The primary components of this system are the Sentry Key Immo- bilizer Module (SKIM), the Sentry Key transponder, the Vehicle Theft/Security System (VTSS) indicator LED, and the Powertrain Control Module (PCM).
The SKIM is installed on the steering column near the ignition lock cylinder. The transponder is located under the molded rubber cap on the head of the igni-
STANDARD PROCEDURE
CONFIGURING A NEW MODULE / SWITCH
OPERATING MODES . . . . . . . . . . . . . . . . . . . . 3
SENTRY KEY IMMOBILIZER SYSTEM
INITIALIZATION . . . . . . . . . . . . . . . . . . . . . . . . 3
SENTRY KEY IMMOBILIZER SYSTEM
TRANSPONDER PROGRAMMING . . . . . . . . . . 4
SENTRY KEY IMMOBILIZER SYSTEM
INDICATOR LAMP DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5tion key. The VTSS indicator LED is located in the instrument cluster.
The SKIS includes two valid Sentry Key transpon- ders from the factory. This is so the customer can self program new keys if one is lost. If the customer wishes, additional non-coded blank Sentry Keys are available. These blank keys can be cut to match a valid ignition key, but the engine will not start unless the key transponder is also programmed to the vehicle. The SKIS will recognize no more than eight valid Sentry Key transponders at any one time. The SKIS performs a self-test each time the igni- tion switch is turned to the ON position, and will store Diagnostic Trouble Codes (DTC’s) if a system malfunction is detected. The SKIS can be diagnosed, and any stored DTC can be retrieved using a DRBIIIt scan tool as described in the proper Body Diagnostic Procedures Manual.
DESCRIPTION
The Sentry Key Immobilizer Module (SKIM) con- tains a Radio Frequency (RF) transceiver and a cen- tral processing unit, which includes the Sentry Key Immobilizer System (SKIS) program logic. The SKIS programming enables the SKIM to program and retain in memory the codes of at least two, but no more than eight electronically coded Sentry Key transponders. The SKIS programming also enables the SKIM to communicate over the Programmable Communication Interface (PCI) bus network with the Powertrain Control Module the DRBIIIt scan tool.
(PCM), and/or
VEHICLE THEFT SECURITY
8Q - 2
VEHICLE THEFT SECURITY (Continued) OPERATIONOPERATION
When in the Customer Usage mode of operation, the system is armed when the vehicle is locked using the:† Power Door Lock Switches † Remote Keyless Entry (RKE) Transmitter † Key Cylinder Switches After the vehicle is locked and the last door is closed, the VTSS indicator in the instrument cluster will flash quickly for 16 seconds, indicating that the arming is in process. After 16 seconds, the LED will continue to flash at a slower rate indicating that the system is armed.
VTSS disarming occurs upon normal vehicle entry by unlocking either door via the key cylinder or RKE transmitter, or by starting the vehicle with a valid Sentry Key. This disarming will also halt the alarm once it has been activated.
A tamper alert exists to notify the driver that the system has been activated. This alert consists of 3
horn pulses and the security telltail flashing for 30
seconds when the vehicle is disarmed. The tamper alert will not occur if disarmed while alarming.The VTSS will not arm by mechanically locking the vehicle doors. This will manually override the sys- tem.
OPERATION
The SKIS includes two valid Sentry Key transpon- ders from the factory. These two Sentry Keys can be used to program additional non-coded blank Sentry Keys. These blank keys can be cut to match a valid ignition key, but the engine will not start unless the key transponder is also programmed to the vehicle. The SKIS will recognize no more than eight valid Sentry Key transponders at any one time.
The SKIS performs a self-test each time the igni- tion switch is turned to the ON position, and will store Diagnostic Trouble Codes (DTC’s) if a system malfunction is detected. The SKIS can be diagnosed, and any stored DTC can be retrieved using a DRBIIIt scan tool as described in the proper Power- train Diagnostic Procedures manual.
OPERATION
The SKIM transmits and receives RF signals through a tuned antenna enclosed within a molded plastic ring formation that is integral to the SKIM housing. When the SKIM is properly installed on the steering column, the antenna ring is oriented around the circumference of the ignition lock cylinder hous- ing. This antenna ring must be located within eight millimeters (0.31 inches) of the Sentry Key in order
DR
to ensure proper RF communication between the SKIM and the Sentry Key transponder.
For added system security, each SKIM is pro- grammed with a unique “Secret Key” code and a security code. The SKIM keeps the “Secret Key” code in memory. The SKIM also sends the “Secret Key” code to each of the programmed Sentry Key tran- sponders. The security code is used by the assembly plant to access the SKIS for initialization, or by the dealer technician to access the system for service. The SKIM also stores in its memory the Vehicle Identification Number (VIN), which it learns through a PCI bus message from the PCM during initializa- tion.
The SKIM and the PCM both use software that includes a rolling code algorithm strategy, which helps to reduce the possibility of unauthorized SKIS disarming. The rolling code algorithm ensures secu- rity by preventing an override of the SKIS through the unauthorized substitution of the SKIM or the PCM. However, the use of this strategy also means that replacement of either the SKIM or the PCM units will require a system initialization procedure to restore system operation.
When the ignition switch is turned to the ON or START positions, the SKIM transmits an RF signal to excite the Sentry Key transponder. The SKIM then listens for a return RF signal from the transponder of the Sentry Key that is inserted in the ignition lock cylinder. If the SKIM receives an RF signal with valid “Secret Key” and transponder identification codes, the SKIM sends a “valid key” message to the PCM over the PCI bus. If the SKIM receives an invalid RF signal or no response, it sends “invalid key” messages to the PCM. The PCM will enable or disable engine operation based upon the status of the SKIM messages.
The SKIM also sends messages to the Instrument Cluster which controls the VTSS indicator. The SKIM sends messages to the Instrument Cluster to turn the indicator on for about three seconds when the ignition switch is turned to the ON position as a “bulb” test. After completion of the “bulb” test, the SKIM sends bus messages to keep the indicator off for a duration of about one second. Then the SKIM sends messages to turn the indicator on or off based upon the results of the SKIS self-tests. If the VTSS indicator comes on and stays on after the “bulb test”, it indicates that the SKIM has detected a system malfunction and/or that the SKIS has become inoper- ative.
If the SKIM detects an invalid key when the igni- tion switch is turned to the ON position, it sends messages to flash the VTSS indicator. The SKIM can also send messages to flash the indicator to serve as an indication to the customer that the SKIS has been
DR VEHICLE THEFT SECURITY (Continued)
placed in its “Customer Learn” programming mode. See Sentry Key Immobilizer System Transponder Programming in this section for more information on the “Customer Learn” programming mode.
For diagnosis or initialization of the SKIM and the PCM, a DRBIIIt scan tool and the proper Powertrain Diagnostic Procedures manual are required. The SKIM cannot be repaired and, if faulty or damaged, the unit must be replaced.
DIAGNOSIS AND TESTING
VEHICLE THEFT SECURITY SYSTEM
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, REFER TO RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE 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
