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sage to the Front Control Module, which is mated to the power distribution center to become the Inte- grated Control Module, to illuminate the appropriate bulbs. When the multifunction switch is activated to the optical horn or high beam position the Instru- ment Cluster illuminates the high beam indicator and sends a J1850 message to the Front Control Module to illuminate the appropriate bulbs.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISO- LATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYS- TEM CAPACITOR TO DISCHARGE BEFORE PER- FORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE- CAUTIONS COULD RESULT IN ACCIDENTAL AIR- BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the left instrument panel bezel. (Refer to 23 - BODY/INSTRUMENT PANEL/CLUSTER BEZEL - REMOVAL).
(3) Disconnect the harness connector.
Fig.9HeadlampSwitchRemoval
1 - DASH BOARD 2 - HEADLAMP SWITCH 3 - INSTRUMENT PANEL BEZAL
(5) Remove the headlamp switch from the instru-
ment panel bezel.
INSTALLATION
WARNING: ON VEHICLES EQUIPPED WITH AIR- BAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISO- LATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYS- TEM CAPACITOR TO DISCHARGE BEFORE PER- FORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRE- CAUTIONS COULD RESULT IN ACCIDENTAL AIR- BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Position the headlamp switch to the left instru- ment panel bezal and secure with screws.Tighten the screws to 2.2 N·m (20 in. lbs.).
(2) Reconnect the instrument panel wire harness
connector for the headlamp switch.
(3) Position the left instrument panel bezal on to
the instrument panel.
DR HEADLAMP SWITCH (Continued)
(4) Install the cluster bezel onto the instrument
panel (Fig. 9).
(5) Connect the battery negative cable.
HEADLAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
(2) Remove the push pins attaching the seal to the
(3) Remove the bolts attaching the headlamp unit
to the fender (Fig. 10).
(4) Remove the bulb sockets from the headlamp
cable.
fender.
unit
(5) Separate headlamp unit from vehicle.
Fig.10HEADLAMP—TYPICAL
1 - SEAL 2 - PUSH PIN 3 - SCREW 4 - HEADLAMP UNIT
INSTALLATION
CAUTION: Do not touch the bulb glass with fingers or other oily surfaces. Reduced bulb life will result.
(1) Install the bulb sockets for the front park/turn
signal and headlamp.
(2) Position headlamp unit in inner fender panel. (3) Install the bolts attaching headlamp unit to the
fender (Fig. 10).
(4) Align the seal and install the push pins. (5) Connect the battery negative cable.
LAMPS/LIGHTING - EXTERIOR
8L - 15
ADJUSTMENTS
Headlamps can be aligned using the screen method provided in this section. Alignment Tool C-4466-A or equivalent can also be used. Refer to instructions provided with the tool for proper procedures.
LAMP ALIGNMENT SCREEN PREPARATION
(1) Position vehicle on a level surface perpendicu- lar to a flat wall 7.62 meters (25 ft) away from front of headlamp lens (Fig. 11).
(2) If necessary, tape a line on the floor 7.62
meters (25 ft) away from and parallel to the wall.
(3) Up 1.27 meters (5 feet) from the floor, tape a line on the wall at the centerline of the vehicle. Sight along the centerline of the vehicle (from rear of vehi- cle forward) to verify accuracy of the line placement. (4) Rock vehicle side-to-side three times to allow
suspension to stabilize.
(5) Jounce front suspension three times by pushing
downward on front bumper and releasing.
(6) Measure the distance from the center of head- lamp lens to the floor. Transfer measurement to the alignment screen (with tape). Use this line for up/down adjustment reference.
(7) Measure distance from the centerline of the vehicle to the center of each headlamp being aligned. Transfer measurements to screen (with tape) to each side of vehicle centerline. Use these lines for left/ right adjustment reference.
VEHICLE PREPARATION FOR HEADLAMP ALIGNMENT
(1) Verify headlamp dimmer switch and high beam
indicator operation.
(2) Correct defective components that could hinder
proper headlamp alignment.
(3) Verify proper tire inflation. (4) Clean headlamp lenses. (5) Verify that luggage area is not heavily loaded. (6) Fuel tank should be FULL. Add 2.94 kg (6.5
lbs.) of weight over the fuel tank for each estimated gallon of missing fuel.HEADLAMP ALIGNMENT
A properly aimed low beam headlamp will project top edge of high intensity pattern on screen from 50
mm (2 in.) above to 50 mm (2 in.) below headlamp centerline. The side-to-side outboard edge of high intensity pattern should be from 50 mm (2 in.) left to 50 mm (2 in.) right of headlamp centerline (Fig. 11). The preferred headlamp alignment is 1( down for the up/down adjustment and 0 for the left/ right adjustment. The high beam pattern should be correct when the low beams are aligned properly.To adjust low beam headlamp, rotate alignment
screws to achieve the specified aim.
LAMPS/LIGHTING - EXTERIOR
8L - 16
HEADLAMP UNIT (Continued)DR
1 - CENTER OF VEHICLE 2 - CENTER OF HEADLAMP
Fig.11HeadlampAlignmentScreen—Typical 3 - 7.62 METERS (25 FT.) 4 - FRONT OF HEADLAMP
LICENSE PLATE LAMP REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Grasp license plate bulb socket and 1/4 turn
left to release from the license plate lamp unit. (3) Pull bulb from license plate lamp socket.
INSTALLATION
(1) Install the bulb in the socket. (2) Install the socket in to the license plate lamp
unit and 1/4 turn to lock.
(3) Connect the battery negative cable.
LICENSE PLATE LAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Disconnect the harness connector. (3) Remove the retaining clip. (Fig. 12). (4) Separate license plate lamp from vehicle.
INSTALLATION
(1) Position license plate lamp on the bumper. (2) Install the clip. (3) Reconnect the harness connector. (4) Connect the battery negative cable.
MARKER LAMP UNIT
REMOVAL
REMOVAL
(1) Grasp the lens assembly firmly and pushing rearward, remove the lens assembly from the fender. (2) Quarter turn the bulb socket counterclockwise
and remove it from lens assembly.
REMOVAL
(1) Remove the lens mounting screws. (2) Quarter twist counterclockwise the tailgate marker lamp bulb sockets and remove lamp housing.
DR MARKER LAMP UNIT (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 17
Fig.12LicensePlateLampPanel
Fig.14TailgateMarkerLampHousing
1 - REAR BUMPER 2 - WIRING CONNECTOR 3 - CLIP 4 - LICENSE PLATE LAMP UNIT
1 - Nut 2 - Tailgate 3 - Bulb Harness 4 - Screw 5 - Lens
INSTALLATION
INSTALLATION
(1) Quarter twist the bulb socket into the lamp
assembly
(2) Position the lamp assembly against the fender, using firm pressure insert the lens into the fender. (Fig. 13)
INSTALLATION
(1) Position the tailgate marker bulb harness to the lens and quarter twist each bulb assembly clock- wise to seat bulb sockets.
(2) Position the tailgate marker lens to the tailgate
and install the retaining screws. (Fig. 14)
Fig.13FENDEREXTENSIONANDMARKERLAMP
ASSEMBLY
1 - WIRING HARNESS 2 - MARKER LAMP
MULTI-FUNCTION SWITCH DESCRIPTION - TURN SIGNAL SYSTEM
The multi-function switch is a resistive MUX switch that is monitored by the Instrument Cluster. The turn signals are actuated with the lever on Multi-Function Switch. The signals are automatically turned off by a canceling cam (two lobes molded to the back of the clock spring mechanism). The cam comes in contact with the cancel actuator on the turn signal (multi-function) switch assembly. Either cam
LAMPS/LIGHTING - EXTERIOR
8L - 18
MULTI-FUNCTION SWITCH (Continued)lobe, pushing on the cancel actuator, returns the switch to the OFF position.
OPERATION - TURN SIGNAL SYSTEM
The Instrument Cluster monitors the multiplexed multifunction switch. In a turning event the Instru- ment Cluster senses a change in the turn signal lever and illuminates the appropriate turn signal indicator. At the same time, the Instrument Cluster will send a J1850 message on the PCI bus to the Front Control Module (FCM). The FCM will respond by activating the appropriate relay in the Power Dis- tribution Center.
A chime will sound after the turn is completed if vehicle has traveled a distance of approximately 1.0
mile and a speed of 15 mph, with the turn signal ON.DR
DIAGNOSIS AND TESTING - MULTI-FUNCTION SWITCH
To test the turn signal, headlamp beam select and
optical horn portion of the multi-function switch:
(1) Remove the multi-function switch, refer to Electrical, Lamps/Lighting - Exterior, Multi-Function Switch, Removal, and Installation.
(2) Using an ohmmeter check the resistance read- ings between multi-function switch pins. Refer to Wiring Diagrams for proper pin numbers and the MULTI-FUNCTION SWITCH TESTS table.
MULTI-FUNCTION SWITCH TESTS
EXTERIOR LIGHTING FUNCTIONS
SWITCH POSITION
CONNECTOR PINS
RESISTANCE (OHMS)
Off Headlamp High Beams On Hazard Optical Horn (Flash-to-Pass) On Off Turn Signal Left Turn Signal Right
1 - 2
1 - 2
3 - 2
1 - 2
3 - 2
3 - 2
3 - 2Open
518 - 575
115 - 1281257 - 1397
2643 - 2937
345 - 384
786 - 873SWITCH POSITION
CONNECTOR PINS
RESISTANCE (OHMS) ±10%
FRONT WIPER FUNCTIONS
Front Wiper Off Delay 1
Delay 2
Delay 3
Delay 4
Delay 5
Front Wiper Low Front Wiper High WashREMOVAL
WARNING: BEFORE SERVICING THE STEERING COLUMN THE AIRBAG SYSTEM MUST BE DIS- ARMED. REFER TO THE ELECTRICAL RESTRAINT SYSTEM FOR SERVICE PROCEDURES. FAILURE TO DO SO MAY RESULT IN ACCIDENTAL DEPLOY- MENT OF THE AIRBAG AND POSSIBLE PERSONAL INJURY
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
2 - 4
1 - 26910 - 7678
2128 - 2365
1089 - 1210
627 - 697
388 - 431
234 - 261
125 - 140
50 - 562584 - 2871
(1) Disconnect and isolate battery negative cable. (2) Remove the steering wheel and the upper and lower steering column shrouds. Refer to Steering, Column, Shroud, Removal.
(3) Disconnect the wire connector from the back of
the multi-function switch.
(4) Remove the screws retaining the multi-function switch to the steering column adapter collar (Fig. 15).
(5) Remove the multi-function switch.
DR MULTI-FUNCTION SWITCH (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 19
Fig.16ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
Fig.15MULTIFUNCTIONSWITCH
1 - SCREW 2 - COLUMN 3 - CLOCK SPRING 4 - MULTI - FUNCTION SWITCH
(6) Remove the screws retaining the clock spring
to the multifunction switch.
INSTALLATION
WARNING: BEFORE SERVICING THE STEERING COLUMN THE AIRBAG SYSTEM MUST BE DIS- ARMED. REFER TO THE ELECTRICAL RESTRAINT SYSTEM FOR SERVICE PROCEDURES. FAILURE TO DO SO MAY RESULT IN ACCIDENTAL DEPLOY- MENT OF THE AIRBAG AND POSSIBLE PERSONAL INJURY.
(1) Install the clock spring on the multifunction
switch.
(2) Position the switch on to the steering column. (3) Install the retaining screws (Fig. 15). (4) Connect the wire harness connector. (5) Install
steering column shrouds and the steering wheel. Refer to Steering, Column, Shroud, Installation.
the upper,
lower
(6) Connect the battery negative cable.
PARK LAMP RELAY DESCRIPTION
The park lamp relay is located in the Power Dis- tribution Center (PDC) of the vehicle. The park lamp
relay is a conventional International Standards Organization (ISO) micro relay (Fig. 16). Relays con- forming to the ISO specifications have common phys- ical terminal patterns, and terminal functions.
dimensions,
capacities,
current
The park lamp relay cannot be adjusted or repaired and, if faulty or damaged, the unit must be replaced.
OPERATION
The park lamp relay is an electromechanical switch that uses a low current input from the Front Control Module (FCM) to control a high current out- put to the park lamps. The movable common feed contact point is held against the fixed normally closed contact point by spring pressure. When the relay coil is energized, an electromagnetic field is produced by the coil windings. This electromagnetic field draws the movable relay contact point away from the fixed normally closed contact point, and holds it against the fixed normally open contact point. When the relay coil is de-energized, spring pressure returns the movable contact point back against the fixed normally closed contact point. A resistor is connected in parallel with the relay coil in the relay, and helps to dissipate voltage spikes and electromagnetic interference that can be generated as the electromagnetic field of the relay coil collapses.
The park lamp relay terminals are connected to the vehicle electrical system through a connector in the Junction Block (JB). The inputs and outputs of the headlamp low beam relay include: † Common Feed Terminal - The common feed terminal (30) is connected to the park lamps through
LAMPS/LIGHTING - EXTERIOR
8L - 20
PARK LAMP RELAY (Continued)DR
the park lamp relay output circuit and provides ground to the park lamps when the relay is de-ener- gized, and battery current to the park lamps when- ever the relay is energized. † Coil Ground Terminal - The coil ground termi- nal (85) is connected to a control output of the Front Control Module (FCM) through a park lamp relay control circuit. The FCM controls park lamp opera- tion by controlling a ground path through this cir- cuit.† Coil Battery Terminal - The coil battery ter- minal (86) receives battery current at all times from a fuse in the PDC through a fused B(+) circuit. † Normally Open Terminal - The normally open terminal (87) receives battery current at all times from a fuse in the Power Distribution Center (PDC) through a fused B(+) circuit.
† Normally Closed Terminal
- The normally closed terminal (87A) is connected to ground at all times.
The park lamp relay can be diagnosed using con-
ventional diagnostic tools and methods.
DIAGNOSIS AND TESTING - PARK LAMP RELAY
The park lamp relay (Fig. 17) is located in the Power Distribution Center (PDC). Refer to the appro- priate wiring 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, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Remove the park lamp relay from the PDC. (2) A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 3. If not OK, replace the faulty relay.
(3) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 ± 8 ohms. If OK, go to Step 4. If not OK, replace the faulty relay.
Fig.17ISOMicroRelay
30 - COMMON FEED 85 - COIL GROUND 86 - COIL BATTERY 87 - NORMALLY OPEN 87A - NORMALLY CLOSED
(4) Connect a battery to terminals 85 and 86. There should now be continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, reinstall the relay and use a DRBIIIt scan tool to perform further testing. Refer to the appropriate diagnostic information.
REMOVAL
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, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable.
cover.
(2) Remove the Power Distribution Center (PDC)
(3) Remove the park lamp relay by grasping it firmly and pulling it straight out from the receptacle in the PDC.
DR PARK LAMP RELAY (Continued) INSTALLATION
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, FRONT IMPACT SENSORS, SIDE CURTAIN AIRBAG, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACI- TOR TO DISCHARGE BEFORE PERFORMING FUR- THER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCI- DENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
(1) Position the park lamp relay to the proper
receptacle in the Power Distribution Center (PDC).
(2) Align the park lamp relay terminals with the
terminal cavities in the PDC.
(3) Press firmly and evenly on the top of the park lamp relay until the terminals are fully seated in the PDC.
unit.
cable.
(4) Install the PDC cover. (5) Reconnect the battery negative cable.
PARK/TURN SIGNAL LAMP REMOVAL
(1) Disconnect and isolate the negative battery
unit.
cable.
(2) Remove the headlamp unit.(Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - REMOVAL).
(3) Seperate the socket from the headlamp unit. (4) Release the bulb socket locking tabs and seper-
ate the bulb from the socket (Fig. 18).
INSTALLATION
(1) Install the bulb into the socket. (2) Install the socket into the headlamp unit. (3) Install the headlamp unit (Refer to 8 - ELEC- TRICAL/LAMPS/LIGHTING - EXTERIOR/HEAD- LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
LAMPS/LIGHTING - EXTERIOR
8L - 21
Fig.18PullBulbFromSocket
1 - SOCKET 2 - BULB
TAIL LAMP REMOVAL
(1) Disconnect and isolate the negative battery
(2) Remove the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
(4) Release the bulb locking tabs and remove the
bulb from the back plate (Fig. 18).
INSTALLATION
(1) Install the bulb into the back plate. (2) Install the bulb back plate to the tail
lamp
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
TAIL LAMP UNIT REMOVAL
(1) Lower the tail gate. (2) Remove the screws (3) Disengage the taillamp unit from the body
panel.
(4) Disconnect the electrical connector (Fig. 19).
INSTALLATION
(1) Connect the wiring harness connector. (2) Position the taillamp unit into the body panel. (3) Install the screws (Fig. 19).
LAMPS/LIGHTING - EXTERIOR
8L - 22
TAIL LAMP UNIT (Continued)DR
20). This harness includes an adapter harness that adapts the 7-pin trailer tow connector to a standard, light-duty, 4-pin trailer tow connector. Refer to the appropriate wiring information.
TURN LAMP REMOVAL
(1) Disconnect and isolate the negative battery
cable.
unit.
unit.
(2) Remove the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - REMOVAL).
(3) Remove the bulb back plate from the tail lamp
(4) Separate the bulb from the lamp bar.
INSTALLATION
(1) Install the bulb into the back plate. (2) Install the bulb back plate to the tail
lamp
(3) Install the tail lamp unit (Refer to 8 - ELEC- EXTERIOR/TAIL
TRICAL/LAMPS/LIGHTING LAMP UNIT - INSTALLATION).
(4) Connect the negative battery cable.
UNDERHOOD LAMP REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Insert a small
flat blade in the access slot
between the lamp base and lamp lens.
(3) Pry the lamp lens upward and remove the
(4) Depress the bulb terminal inward (Fig. 22) to
lamp lens (Fig. 21).
release the bulb.
INSTALLATION
(1) Engage the replacement bulb wire loop to the terminal closest to the lamp base wire connector (Fig. 22).
(2) Depress the opposite terminal engage the remaining bulb wire loop.
inward and
(3) Position the lamp lens on the lamp base and
press into place (Fig. 21).
(4) Connect the battery negative cable.
UNDERHOOD LAMP UNIT REMOVAL
(1) Disconnect and isolate the battery negative
cable.
Fig.19TAILLAMPUNIT
1 - SCREW 2 - ELECTRICAL CONNECTOR 3 - TAILLAMP UNIT
TRAILER TOW WIRING DESCRIPTION
Fig.20TrailerTowWiring
1 - RETAINER CLIP (4) 2 - REAR BODY HARNESS (TRAILER TOW TAKE OUT) 3 - RETAINER CLIP (2) 4 - WIRE HARNESS CONNECTOR
Vehicles equipped with an optional
factory-in- stalled trailer towing package have a rear body wire harness that includes an integral trailer tow wiring take out that connects to a heavy duty, sealed, 7-pin trailer tow connector located in the rear bumper (Fig.
DR UNDERHOOD LAMP UNIT (Continued)
LAMPS/LIGHTING - EXTERIOR
8L - 23
Fig.21UnderhoodLampLens
1 - LAMP 2 - LAMP LENS
Fig.23UnderhoodLamp
1 - UNDER HOOD LAMP 2 - HOOD 3 - CONNECTOR
INSTALLATION
(1) Install bulb. (2) Install lamp lens. (3) Position the underhood lamp on the hood inner
panel.
lamp.
(4) Install the attaching screw through the lamp and into the hood panel (Fig. 23). Tighten the screw securely.
(5) Fold lamp housing over and firmly press onto
base to snap into place.
(6) Connect the wire harness connector to the
(7) Connect the battery negative cable.
Fig.22UnderhoodLampBulb
1 - BULB 2 - DEPRESS TERMINAL INWARD 3 - BULB WIRE LOOP 4 - LAMP BASE
(2) Disconnect the wire harness connector from the
lamp.
(3) Remove lamp lens. (4) Remove bulb. (5) Remove screw attaching underhood lamp to the
inner hood panel (Fig. 23).
(6) Separate underhood lamp from vehicle.
8L - 24
LAMPS/LIGHTING - INTERIOR
LAMPS/LIGHTING - INTERIOR
TABLE OF CONTENTS
page
DR
page
DOME LAMP
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 24
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 24DOOR AJAR SWITCH
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 25
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 25GLOVE BOX LAMP/SWITCH
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 25READING LAMP
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 26
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 26DOME LAMP DESCRIPTION
The dome lamp is controlled by the instrument cluster which provides power at all times, regardless of the ignition switch position. The ground circuit for the lamp is switched through the integral dome lamp switch or through the door ajar switches via the instrument cluster.
The dome lamp lens and bulb are available for ser- vice replacement. If either of the lamp switch or bulb holders is faulty or damaged, the dome lamp assem- bly must be replaced.
For service of the dome lamp bulb, refer to the
appropriate wiring information.
OPERATION
The dome lamp is activated by the door ajar switches via the instrument cluster. When all of the doors are closed, the lamp can be activated by depressing the lens. When any door is open, depress- ing the lamp lense to activate the lamp switch will not turn the lamps off.
The instrument cluster monitors the door ajar switches. When a door is open the instrument cluster grounds the low side drivers to turn on the lamp. Upon closing all doors, the instrument cluster ini- tiates a 30 second timer. If any of the doors are opened during the “time out” cycle, the instrument cluster will reset the timer until all doors are closed. The instrument cluster will faid to off when the doors are closed and the ignition is turned ON, the time out expires or the power locks are activated.
REMOVAL
(1) Using a small flat blade, pry the left side (driv- er’s side) of the dome lamp lens downward from dome lamp.
(2) Allow the lens to hang down (Fig. 1), this will disengage the right side of the lamp (passenger’s side) from the headliner.
(3) Pull the right side of the lamp down and slide
the lamp to the right (Fig. 2).
(4) Separate the lamp from the headliner. (5) Disengage dome lamp wire connector from body
wire harness.
(6) Separate dome lamp from vehicle.
Fig.1DomeLampLens
1 - HEADLINER 2 - CONNECTOR 3 - DOME LAMP 4 - LENS 5 - BULB
INSTALLATION
(1) Position dome lamp at headliner. (2) Connect dome lamp wire connector to body
wire harness.
(3) Position the left side of the lamp in the head-
liner opening and slide lamp to the left (Fig. 1).
(4) Push the right side of the lamp in the head- liner opening and push the lamp lens up into the lamp to secure (Fig. 1).
DR DOME LAMP (Continued)
LAMPS/LIGHTING - INTERIOR
8L - 25
(3) Reach through the glove box opening and behind the glove box lamp and switch mounting bracket to access the instrument panel wire harness connector on the glove box lamp and switch (Fig. 3).
Fig.2DomeLamp
1 - SLIDE LAMP
DOOR AJAR SWITCH DESCRIPTION
The door ajar switches are integral to the door latches on each door. The switches close a path to ground for the Instrument Cluster when a door is opened.
The door ajar switches cannot be repaired and, if faulty or damaged, the door latch unit must be replaced. Refer to the Body section under Doors for the removal and installation procedure.
OPERATION
The door ajar switches close a path to ground for the Instrument Cluster when a door is opened. The passenger front door is connected in a parallel-series circuit between ground and the Instrument Cluster, while the driver side front door ajar switch is con- nected in series between ground and the Instrument Cluster to provide a unique input. The Instrument Cluster reads the switch status, then sends the proper switch status messages to other electronic modules over the Programmable Communications Interface (PCI) data bus network. The door ajar switches can be diagnosed using conventional diag- nostic tools and methods. Refer to the Body section under Doors for the Removal and Installation proce- dures.
GLOVE BOX LAMP/SWITCH REMOVAL
(1) Disconnect and isolate the battery negative
cable.
Fig.3GloveBoxLampandSwitchRemove/Install 1 - WIRE HARNESS CONNECTOR 2 - DASH BOARD 3 - GLOVE BOX SWITCH/LIGHT
(4) Disconnect the instrument panel wire harness connector from the connector receptacle on the back of the glove box lamp and switch unit.
(5) Reach through the glove box opening and behind the glove box lamp and switch mounting bracket to depress the retaining tabs on the top and bottom of the glove box lamp and switch housing.
(6) While holding the retaining tabs depressed, push the glove box lamp and switch unit out through the hole in the mounting bracket on the instrument panel glove box opening upper reinforcement.
(7) Remove the glove box lamp and switch unit
from the instrument panel.
INSTALLATION
(1) Reach through the glove box opening and behind the glove box lamp and switch mounting bracket to feed the instrument panel wire harness connectors out through the hole in the glove box lamp and switch housing mounting bracket.
(2) Position the glove box lamp and switch unit to
the instrument panel.
(2) Remove the glove box from the instrument panel. (Refer to 23 - BODY/INSTRUMENT PANEL/ GLOVE BOX - REMOVAL) for the procedures.
(3) Reconnect the instrument panel wire harness connector to the connector receptacle on the back of the glove box lamp and switch unit.
LAMPS/LIGHTING - INTERIOR
8L - 26
GLOVE BOX LAMP/SWITCH (Continued)DR
(4) Push the glove box lamp and switch unit into the hole in the mounting bracket on the instrument panel glove box opening upper reinforcement.
(5) Install the glove box onto the instrument panel. (Refer to 23 - BODY/INSTRUMENT PANEL/GLOVE BOX - INSTALLATION) for the procedures.
(6) Close the glove box. (7) Reconnect the battery negative cable.
READING LAMP DESCRIPTION
The overhead console in this vehicle is equipped with two individual reading and courtesy lamps. The lamp lenses are the only visible components of these lamps. Each lamp has its own switch, bulb, reflector and lens within the overhead console.
The overhead console reading and courtesy lamps are controlled by the instrument cluster which pro- vides power at all times, regardless of the ignition switch position. The ground circuit for the lamps is switched through the integral reading and courtesy lamp switches or through the door ajar switches. Each lamp is designed and aimed to provide illumi- nation that will be directed only to that side of the vehicle on which the lamp is located.
The reading and courtesy lamp lenses and bulbs are available for service replacement. The reading and courtesy lamp switches, bulb holders and wiring are only available as part of the overhead console wire harness. If either of the lamp switches or bulb holders is faulty or damaged, the entire overhead console wire harness assembly must be replaced.
For service of the reading and courtesy lamp bulbs,
refer to the appropriate wiring information.
OPERATION
All reading and courtesy lamps located in the over- head console are activated by the door ajar switches via the instrument cluster. When all of the doors are closed, these lamps can be individually activated by depressing the corresponding lens. When any door is open, depressing the lamp lenses to activate the lamp switches will not turn the lamps off.
The instrument cluster monitors the door ajar switches. When a door is open the instrument cluster grounds the low side drivers to turn on the lamps. Upon closing all doors, the instrument cluster ini- tiates a 30 second timer. If any of the doors are opened during the “time out” cycle, the instrument cluster will reset the timer until all doors are closed. The instrument cluster will faid to off when the doors are closed and the ignition is turned ON, the time out expires or the power locks are activated.
REMOVAL
cable.
(1) Disconnect and isolate the battery negative
(2) Insert a long, narrow, flat-bladed tool between the curved (outboard) edge of the reading and cour- tesy lamp lens and the overhead console housing (Fig. 4).
(3) Gently pry inward and downward against the lens until the latch tab in the center of the outboard edge of the reading and courtesy lamp lens is disen- gaged from the overhead console housing.
(4) Pull firmly on the lens toward the outboard side of the vehicle to disengage the two pivot tabs on the inboard edge of the reading and courtesy lamp lens are disengaged from the overhead console housing.
(5) Remove the reading and courtesy lamp lens
from the overhead console housing.
Fig.4OverheadConsoleReadingLampBulb
Removal
1 - LENS 2 - FLAT BLADE 3 - CONSOLE
INSTALLATION
(1) Position the reading and courtesy lamp lens
onto the overhead console housing.
(2) Align the two pivot tabs on the inboard edge of the reading and courtesy lamp lens with the two pivot holes in the overhead console housing.
(3) Push firmly on the lens toward the inboard side of the vehicle to insert the two pivot tabs on the inboard edge of the reading and courtesy lamp lens into the two pivot holes in the overhead console hous- ing.
(4) Pivot the lens back up into position and press upward firmly until the latch tab in the center of the outboard edge of the reading and courtesy lamp lens snaps back into the overhead console housing.
(5) Reconnect the battery negative cable.
DR
MESSAGE SYSTEMS
8M - 1
MESSAGE SYSTEMS
TABLE OF CONTENTS
page
page
OVERHEAD CONSOLE
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING - OVERHEADCONSOLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
STANDARD PROCEDURE
STANDARD PROCEDURE - READING/
COURTESY LAMP REPLACEMENT . . . . . . . . . 3
STANDARD PROCEDURE - MODULE LENS
REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 3
STANDARD PROCEDURE - MODULE LAMP
REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . 3
STANDARD PROCEDURE - COMPASS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DIAGNOSIS AND TESTING - ELECTRONICVEHICLE INFORMATION CENTER
. . . . . . . . . 8
STANDARD PROCEDURE - ELECTRONIC
VEHICLE INFORMATION CENTER PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . 8
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 10AMBIENT TEMP SENSOR
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 10
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DIAGNOSIS AND TESTINGDIAGNOSIS AND TESTING - AMBIENT
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . 3
TEMPERATURE SENSOR . . . . . . . . . . . . . . . 11
STANDARD PROCEDURE - COMPASS
DEMAGNETIZING . . . . . . . . . . . . . . . . . . . . . . 4
STANDARD PROCEDURE - COMPASS
VARIATION ADJUSTMENT . . . . . . . . . . . . . . . . 4
DIAGNOSIS AND TESTING - AMBIENT
TEMPERATURE SENSOR CIRCUIT . . . . . . . . 11
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 11REMOVAL
OVERHEAD CONSOLE REMOVAL
. . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SPECIAL TOOLSOVERHEAD CONSOLE . . . . . . . . . . . . . . . . . . 6
COMPASS/MINI-TRIP COMPUTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DIAGNOSIS AND TESTING - COMPASSMINI-TRIP COMPUTER . . . . . . . . . . . . . . . . . . 7
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 7ELECTRONIC VEHICLE INFO CENTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 7
OVERHEAD CONSOLE DESCRIPTION
Two different overhead consoles are available on DR models. The Electronic Vehicle Information Cen- ter (EVIC) (Fig. 1) or Compass Mini-Trip Computer (CMTC). All consoles are equipped with two reading/ courtesy lamps. The overhead console is mounted with screws and two snap clips to a molded plastic retainer bracket located above the headliner.
COMPASS DISPLAY
All the available overhead consoles on this model include Compass information. While in the compass/ the compass will display the temperature mode,
UNIVERSAL TRANSMITTER
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DIAGNOSIS AND TESTING - UNIVERSALTRANSMITTER . . . . . . . . . . . . . . . . . . . . . . . 12
STANDARD PROCEDURE
STANDARD PROCEDURE - ERASING
TRANSMITTER CODES . . . . . . . . . . . . . . . . . 12
STANDARD PROCEDURE - SETTING
TRANSMITTER CODES . . . . . . . . . . . . . . . . . 12
REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13direction in which the vehicle is pointed using the eight major compass headings (Examples: north is N, northeast is NE). The self-calibrating compass unit requires no adjusting in normal use. The only cali- bration that may prove necessary is to drive the vehi- cle at 5 to 8 kilometers-per-hour (3 to 5 miles-per- hour), on level ground in a square shaped pattern. This will reorient the compass unit to its vehicle.
The compass unit also will compensate for magne- tism the body of the vehicle may acquire during nor- mal use. However, avoid placing anything magnetic directly on the roof of the vehicle. Magnetic mounts for an antenna, a repair order hat, or a funeral pro- cession flag can exceed the compensating ability of the compass unit if placed on the roof panel. Mag- netic bit drivers used on the fasteners that hold the
8M - 2 MESSAGE SYSTEMS OVERHEAD CONSOLE (Continued)
DR
ent temperature sensor, refer to Ambient Tempera- ture Sensor later in this section.
Following are general descriptions of the major components used in the overhead console. Refer to Wiring Diagrams for complete circuit schematics.
OPERATION
Refer to the vehicle Owner’s Manual for specific operation of each overhead console and its systems.
DIAGNOSIS AND TESTING - OVERHEAD CONSOLE
If the problem with the overhead console is an inaccurate or scrambled display, refer to SELF-DI- AGNOSTIC TEST later in this text. If the problem with the overhead console is incorrect Vacuum Fluo- rescent Display (VFD) dimming levels, use a DRB IIIt scan tool and the proper Diagnostic Procedures manual to test for the correct dimming message inputs being received from the Body Control Module (BCM) or Front Control Module (FCM) over the J1850 Programmable Communications Interface (PCI) data bus circuit. If the problem is a no-display condition, use the following procedure. For complete circuit diagrams, refer to Overhead Console in the Wiring Diagrams section of the service manual.
(1) Remove the overhead console from the head- liner (Refer to 8 - ELECTRICAL/OVERHEAD CON- SOLE - REMOVAL).
(2) Check for battery voltage at the overhead con- sole electrical connector. Refer to Wiring for connec- tor information. If OK, go to Step 3. If not OK, Check for battery voltage at the appropriate B(+) fuse in the integrated power module, repair the open fused B(+) circuit as required.
(3) Turn the ignition switch to the On position. Check the fused ignition switch output circuit(s) at the overhead console electrical connector. If OK, go to Step 4. If not OK, repair the open or shorted circuit as required.
(4) Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Check for continuity between the ground circuit cav- ity of the overhead console electrical connector and a good ground. There should be continuity. If OK, refer to SELF-DIAGNOSTIC TEST below for further diagnosis of the electronics module and the J1850
PCI data bus circuit. If not OK, repair the open ground circuit as required.SELF-DIAGNOSTIC TEST
A self-diagnostic test is built-in to the module to determine that the electronics module is operating properly, and that all the J1850 PCI data bus mes- sages are being received for proper operation. To per- form the self-diagnostic test proceed as follows:
Fig.1DROVERHEADCONSOLE–EVIC
overhead console assembly to the roof header can also affect compass operation. If the vehicle roof should become magnetized, the demagnetizing and calibration procedures found in this section may be required to restore proper compass operation.
TEMPERATURE DISPLAY
All the available overhead consoles on this model include Temperature information. The temperature displays the outside ambient temperature in whole degrees. The temperature display can be toggled from Fahrenheit to Celsius by selecting the desired U.S./Metric option from the customer programmable features. The displayed temperature is not an instant reading of conditions, but an average temperature. It may take the temperature display several minutes to respond to a major temperature change, such as driv- ing out of a heated garage into winter temperatures. When the ignition switch is turned to the Off posi- tion, the last displayed temperature reading stays in the electronic control modules, (CMTC, EVIC) mem- ory. When the ignition switch is turned to the On position again, the electronic module will display the memory temperature for one minute; then update the display to the current average temperature reading within five minutes.
The temperature function is supported by an ambi- ent temperature sensor. This sensor is mounted out- side the passenger compartment near the front and center of the vehicle, and is hard wired to the Front Control Module (FCM). The FCM sends temperature status messages to the module over the J1850 PCI data bus circuit. For more information on the ambi-
DR OVERHEAD CONSOLE (Continued)
MESSAGE SYSTEMS
8M - 3
(1) With the ignition switch in the Off position, simultaneously depress and hold the STEP and RESET buttons.
(2) Turn the ignition switch to the On position. (3) Following completion of the test, the electronics
module will display one of the following messages:
a. Pass Self Test (EVIC only), PASS (CMTC) -
The electronics module is working properly.
b. Failed Self Test (EVIC only), FAIL (CMTC) - The electronics module has an internal failure. The electronics module is faulty and must be replaced.
c. Failed J1850 Communication (EVIC only), BUS (CMTC) - The electronics module is not receiv- ing proper message input through the J1850 PCI data bus circuit. This can result from one or more faulty electronic modules in the vehicle, or from a faulty PCI data bus. The use of a DRB IIIt scan tool and the proper Diagnostic Procedures manual are required for further diagnosis.
STANDARD PROCEDURE - MODULE LENS REPLACEMENT
(1) Remove the overhead console (Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE - REMOV- AL).
(2) Remove the electronics module from the over- head console. Refer to the procedure later in this sec- tion.
(3) Unsnap the lens from the module and replace
lens as necessary.
STANDARD PROCEDURE - MODULE LAMP REPLACEMENT
(1) Remove the overhead console (Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE - REMOV- AL).
(2) Using a flat blade screwdriver twist out socket/
lamp (Fig. 2).
(3) Replace lamp(s) as necessary.
NOTE: If the compass functions, but accuracy is suspect, it may be necessary to perform a variation adjustment. This procedure allows the compass unit to accommodate variations in the earth’s mag- netic field strength, based on geographic location. Refer to Compass Variation Adjustment in the Stan- dard Procedures section of this group.
NOTE: If the compass reading displays dashes, and only “CAL” appears in the display, demagnetizing may be necessary to remove excessive residual magnetic fields from the vehicle. Refer to Compass Demagnetizing in the Standard Procedures section of this group.
STANDARD PROCEDURE
STANDARD PROCEDURE - READING/ COURTESY LAMP REPLACEMENT
(1) Open hood, disconnect and isolate the negative
battery cable.
(2) Remove the reading/courtesy lamp lens. Using a trim stick, gently pry the forward edge of the read- ing/courtesy lamp lens outward.
(3) Remove the reading/courtesy lamp socket from the overhead console. Rotate the reading/courtesy lamp socket one quarter turn counter clockwise.
(4) Remove the lamp and socket assembly. (5) Reverse the above procedure to install.
Fig.2TopofOverheadConsole
1 - OVERHEAD CONSOLE HOUSING 2 - EVIC/CMTC MODULE 3 - ILLUMINATION LAMPS 4 - MODULE RETAINING SCREWS
STANDARD PROCEDURE - COMPASS CALIBRATION
CAUTION: Do not place any external magnets, such as magnetic roof mount antennas, in the vicinity of the compass. Do not use magnetic tools when ser- vicing the overhead console.
8M - 4 MESSAGE SYSTEMS OVERHEAD CONSOLE (Continued)
DR
feature automatically updates
The electronic compass unit features a self-cali- brating design, which simplifies the calibration pro- cedure. This the compass calibration while the vehicle is being driven. This allows the compass unit to compensate for small changes in the residual magnetism that the vehicle may acquire during normal use. If the compass read- ings appear to be erratic or out of calibration, per- form the following calibration procedure. Also, new service (EVIC, CMTC) must have their compass calibrated using this procedure. Do not attempt to calibrate the com- pass near large metal objects such as other vehicles, large buildings, or bridges; or, near overhead or underground power lines.
replacement Electronic Modules
NOTE: Whenever the compass is calibrated manu- ally, the variance number must also be reset. Refer to Compass Variation Adjustment in this group.
To calibrate the compass manually proceed as fol-
lows:
(1) Turn the ignition switch to the On position. If the compass/temperature data is not currently being displayed, momentarily depress and release the C/T push button to reach the compass/temperature dis- play.
(2) Depress the RESET push button and hold the button down until “CAL” appears in the display. This takes about ten seconds, and appears about five sec- onds after “VAR = XX” is displayed.
(3) Release the RESET push button. (4) Drive the vehicle on a level surface, away from large metal objects and power lines, through three or more complete turns at between five and eight kilo- meters-per-hour (three and five miles-per-hour) in not less than 48 seconds. The “CAL” message will disappear from the display to indicate that the com- pass is now calibrated.
NOTE: If the “CAL” message remains in the display, either there is excessive magnetism near the com- pass, or the unit is faulty. Repeat the calibration procedure one more time.
NOTE: If the wrong direction is still indicated in the compass display, the area selected for calibration may be too close to a strong magnetic field. Repeat the calibration procedure in another location.
overhead console. Equivalent units must be rated as continuous duty for 110/115 volts and 60 Hz. They must also have a field strength of over 350 gauss at 7
millimeters (0.25 inch) beyond the tip of the probe.To demagnetize the roof panel and the overhead console forward mounting screw, proceed as follows: (1) Be certain that the ignition switch is in the Off position, before you begin the demagnetizing proce- dure.
(2) Connect the degaussing tool to an electrical outlet, while keeping the tool at least 61 centimeters (2 feet) away from the compass unit.
(3) Slowly approach the head of the overhead con- sole mounting screw with the degaussing tool con- nected.
(4) Contact the head of the screw with the plastic coated tip of the degaussing tool for about two sec- onds.
(5) With the degaussing tool still energized, slowly back it away from the screw. When the tip of the tool is at least 61 centimeters (2 feet) from the screw head, disconnect the tool.
(6) Place a piece of paper approximately 22 by 28
centimeters (8.5 by 11 inches), oriented on the vehicle lengthwise from front to rear, on the center line of the roof at the windshield header (Fig. 3). The pur- pose of the paper is to protect the roof panel from scratches, and to define the area to be demagnetized. (7) Connect the degaussing tool to an electrical outlet, while keeping the tool at least 61 centimeters (2 feet) away from the compass unit.(8) Slowly approach the center line of the roof panel at the windshield header, with the degaussing tool connected.
(9) Contact the roof panel with the plastic coated tip of the degaussing tool. Be sure that the template is in place to avoid scratching the roof panel. Using a slow, back-and-forth sweeping motion, and allowing 13 millimeters (0.50 inch) between passes, move the tool at least 11 centimeters (4 inches) to each side of the roof center line, and 28 centimeters (11 inches) back from the windshield header.
(10) With the degaussing tool
still energized, slowly back it away from the roof panel. When the tip of the tool is at least 61 centimeters (2 feet) from the roof panel, disconnect the tool.
(11) Calibrate the compass and adjust the compass variance (Refer to 8 - ELECTRICAL/OVERHEAD CONSOLE - STANDARD PROCEDURE).
STANDARD PROCEDURE - COMPASS DEMAGNETIZING
A degaussing tool (Special Tool 6029) is used to demagnetize, or degauss, the overhead console for- ward mounting screw and the roof panel above the
STANDARD PROCEDURE - COMPASS VARIATION ADJUSTMENT
Compass variance, also known as magnetic decli- nation, is the difference in angle between magnetic north and true geographic north. In some geographic locations, the difference between magnetic and geo-
DR OVERHEAD CONSOLE (Continued)
MESSAGE SYSTEMS
8M - 5
(4) Release the RESET push button. “VAR =XX ” will remain in the display. “XX” equals the current variance zone setting.
(5) Depress and release the STEP push button to step through the zone numbers, until the zone num- ber for your geographic location appears in the dis- play.
(6) Depress and release the RESET push button to enter the displayed zone number into the EVIC/ CMTC module memory.
(7) Confirm that the correct directions are now
indicated by the compass.
REMOVAL
OVERHEAD CONSOLE REMOVAL
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the overhead console retaining screws,
located in the sunglass storage bin.
(3) Using your fingertips, grasp the sides of the overhead console and pull straight down evenly to disengage the two snap clips at the front of the unit. (4) Lower the overhead console far enough to
access the wire harness connectors.
(5) Disconnect the EVIC, CMTC electronic module and the reading/courtesy lamps electrical connectors. (6) Remove the overhead console from the vehicle.
Fig.3RoofDemagnetizingPattern
graphic north is great enough to cause the compass to give false readings. If this problem occurs, the compass variance setting may need to be changed.
To set the compass variance: (1) Using the Variance Settings map,
find your geographic location and note the zone number (Fig. 4).
(2) Turn the ignition switch to the On position. If the compass/temperature data is not currently being displayed, momentarily depress and release the C/T push button to reach the compass/temperature dis- play.
(3) Depress the RESET push button and hold the button down until “VAR = XX” appears in the display. This takes about five seconds.
INSTALLATION
(1) Position the overhead console in the vehicle. (2) Connect the EVIC, CMTC electronic module and the reading/courtesy lamps electrical connectors. (3) Grasp the sides of the overhead console and push straight up evenly to engage the two snap clips at the rear of the unit.
(4) Install the overhead console retaining screw, located in the front of console. Torque the screw to 1.2 N·m (10 in. lbs.).
(5) Connect the negative battery cable.
8M - 6 MESSAGE SYSTEMS OVERHEAD CONSOLE (Continued)
DR
SPECIAL TOOLS
OVERHEAD CONSOLE
Fig.4VarianceSettings
DEGAUSSINGTOOL#6029
COMPASS/MINI-TRIP COMPUTER DESCRIPTION
The Compass Mini-Trip Computer (CMTC)
is a module located in the overhead console. The CMTC is equipped with a mini-trip feature. The CMTC con- sists of a electronic control module with a vacuum fluorescent display (VFD) and function switches. The CMTC consists of a electronic module that displays compass, trip computer, and temperature features. Actuating the STEP push button will cause the CMTC to change mode of operation when the ignition is ON. Example: † Average miles per gallon (ECO) † Distance to empty (DTE) † Trip odometer (ODO)
RADIOFREQUENCYDETECTOR#9001
† Elapsed time (ET) † Off Actuating the C/T push button will cause the
CMTC to change to Compass/Temperature display.
MESSAGE SYSTEMS
8M - 7
DR COMPASS/MINI-TRIP COMPUTER (Continued) OPERATION
The Compass Mini-Trip Computer module in the overhead console has buttons used to select various functions. The CMTC selector buttons will not oper- ate until the ignition is in the RUN position.
When the ignition switch is first turned to the RUN position the CMTC display; † Returns to the last mode setting selected before the ignition was last switched OFF.
DIAGNOSIS AND TESTING - COMPASS MINI-TRIP COMPUTER
Compass Mini-Trip Computer (CMTC) data is obtained from other electronic modules (CCN, FCM and JTEC) on the J1850 Data Bus circuit. The CMTC will display dashes (- -) for any of the screens it did not receive the bus messages. The label corre- sponding to the missing information will be lit. If no compass mini-trip computer data is displayed, check the J1850 Data Bus circuit communications and the other modules.
Refer to Overhead Console Diagnosis and Testing for instructions on performing a CMTC module Self- Diagnostic Test. The DRB IIIt is recommended for checking the J1850 Data Bus circuit and the other modules. Perform the CMTC self diagnosis before replacing the CMTC module.
REMOVAL
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the overhead console from the headlin- er.(Refer to 8 - ELECTRICAL/OVERHEAD CON- SOLE - REMOVAL).
(3) Remove the screws holding Compass Mini-Trip
Computer module in the overhead console (Fig. 5).
(4) Disconnect the CMTC module electrical connec- tor. Depress the retaining tab and pull straight apart.
(5) Remove CMTC module from console assembly.
INSTALLATION
(1) Position the compass mini-trip computer mod-
ule in the overhead console.
(2) Install the screws holding the compass mini-
trip computer module in the overhead console. (3) Connect the module electrical connector. (4) Install the overhead console on the headlin- er(Refer to 8 - ELECTRICAL/OVERHEAD CON- SOLE - INSTALLATION).
(5) Connect the negative battery cable. (6) Check CMTC module function.
NOTE: If a new module has been installed, the com- pass will have to be calibrated and the variance set. Refer to Compass Variation Adjustment and Com-
Fig.5OVERHEADCONSOLEMODULEREMOVAL 1 - COMPASS MINI-TRIP COMPUTER MODULE 2 - OVERHEAD CONSOLE
pass Calibration in the Standard Procedures sec- tion of this group for the procedures.
ELECTRONIC VEHICLE INFO CENTER DESCRIPTION
The Electronic Vehicle Information Center (EVIC) is a module located in the overhead console on some models. The EVIC module features a large Vacuum Fluorescent Display (VFD) screen for displaying information, and back-lit push button switches labeled C/T (compass/temperature), RESET, STEP, and MENU.
The EVIC module contains a central processing unit and interfaces with other electronic modules in the vehicle over the Programmable Communications Interface (PCI) J1850 data bus circuit. The PCI data bus circuit allows the sharing of sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware, and reduce component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabil- ities.
The EVIC “Menu” push button provides the vehicle operator with a user interface, which allows the selection of several optional customer programmable individual preferences. electronic features to suit
8M - 8 MESSAGE SYSTEMS ELECTRONIC VEHICLE INFO CENTER (Continued)
DR
to ELECTRONIC VEHICLE INFORMA- Refer TION CENTER PROGRAMMING in the Standard Procedures section of this group for more information on the customer programmable feature options.
If the vehicle is equipped with the optional univer- sal transmitter transceiver, the EVIC will also dis- play messages and an icon indicating when the universal transmitter transceiver is being trained, which of the three transmitter buttons is transmit- ting, and when the transceiver is cleared.
Data input for all EVIC functions, including VFD dimming level, is received through the J1850 PCI data bus circuit. The EVIC module uses its internal programming and all of its data inputs to calculate and display the requested data. If the data displayed is incorrect, perform the self-diagnostic tests as described in this group. If these tests prove inconclu- sive, the use of a DRB IIIt scan tool and the proper Diagnostic Procedures manual are recommended for further testing of the EVIC module and the J1850
PCI data bus circuit.The EVIC module cannot be repaired, and is avail- able for service only as a unit. If any part is faulty or damaged, the complete EVIC module must be replaced.
OPERATION
The Electronic Vehicle Information Center is wired to both constant 12v and ignition switched sources of battery current so that some of its features remain operational at any time, while others may only oper- ate with the ignition switch in the On position. When the ignition switch is turned to the On position, the EVIC module display will return to the last function being displayed before the ignition was turned to the Off position.
The compass/temperature display is the normal EVIC display. With the ignition switch in the On position, momentarily depressing and releasing the C/T (compass/temperature) push button switch will cause the EVIC to return to the compass/tempera- ture display mode from any other mode. While in the compass/temperature display mode, momentarily depressing and releasing the Step push button will step through the available trip computer display options.
The EVIC trip computer features several functions that can be reset. The functions that can be reset are: average fuel economy, trip odometer and elapsed time. With the ignition switch in the On position and with one of the functions of the trip computer that can be reset currently displayed, depressing the Reset push button twice within three seconds will perform a global reset, and all of the trip computer information that can be reset will be reset to zero. With the ignition switch in the On position and the
is to be reset currently displayed, function that momentarily depressing and releasing the Reset push button once will perform a local reset, and only the value of the displayed function will be reset to zero. A global or local reset will only occur if the function currently displayed is a function that can be reset. The distance to service function can also be reset using the local reset method, but it will reset back to the Service Interval distance that is set in the EVIC programmable features mode. Refer to ELECTRONIC VEHICLE INFORMATION CEN- TER PROGRAMMING in the Standard Procedures section of this group for more information on setting the Service Interval.
For more information on the features, control func- tions and setting procedures for the EVIC module, see the owner’s manual in the vehicle glove box.
DIAGNOSIS AND TESTING - ELECTRONIC VEHICLE INFORMATION CENTER
Electronic Vehicle Information Center (EVIC) data is obtained from other electronic modules (CCN, FCM, JTEC) on the J1850 Data Bus circuit. The EVIC will display dashes (- -) for any of the screens it did not receive the bus messages. The label corre- sponding to the missing information will be lit. If no EVIC data is displayed, check the J1850 Data Bus circuit communications and the other modules. If the brightness level is improper check the J1850 Data Bus circuit.
Refer to Overhead Console Diagnosis and Testing for instructions on performing a EVIC module Self- Diagnostic Test. The DRB IIIt is recommended for checking the J1850 Data Bus circuit and other mod- ules. Perform the EVIC self diagnosis before replac- ing the EVIC module.
STANDARD PROCEDURE - ELECTRONIC VEHICLE INFORMATION CENTER PROGRAMMING
EVIC PROGRAMMING MODE
Some vehicles are equipped with a Electronic Vehi- cle Information Center (EVIC) equipped overhead console. The Electronic Vehicle Information Center (EVIC) provides the vehicle operator with a user interface, which allows the selection of several optional customer programmable electronic features to suit individual preferences. The EVIC must be placed into its programming mode in order to view or change the programmable features. To enter the EVIC programming mode and to view or change the selected programmable features options, proceed as follows:
(1) Turn the ignition switch to the On position.
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8M - 9
(2) Momentarily depress and release the Menu push button to step through the programmable fea- tures list. Each programmable feature and its cur- rently selected option will appear on the EVIC display in the sequence shown in the Programmable Features list that follows.
(3) Momentarily depress and release the Step push button to step through the available options for the programmable feature being displayed.
(4) The option that last appears in the display with a programmable feature before exiting the pro- gramming mode, becomes the newly selected pro- grammable feature option.
(5) The EVIC exits the programming mode and returns to its normal operating mode when the C/T push button is depressed or when the end of the pro- grammable features menu list is reached, whichever occurs first.
PROGRAMMABLE FEATURES
† LANGUAGE? - The options include English, Francaise, Deutsch, Italiana, or Espanol. The default is English. All EVIC display nomenclature, including the trip computer functions, warning messages and the programmable features appear in the selected language. † DISPLAY U.S. OR METRIC? - The options include U.S. and M. The default is U.S. This feature toggles the trip computer temperature, fuel economy and odometer display readings between U.S. and metric units of measure. † SERVICE INTV. = - The options include from 3200 to 12000 kilometers in 800 kilometer incre- ments (2000 to 6000 miles in 500 mile increments). The default is 12000 kilometers (6000 miles). The selected distance becomes the interval at which the Perform Service warning message will be displayed by the EVIC. If a new distance is selected, a second programmable feature appears, RESET SERVICE DISTANCE? - The options include No and Yes. The default is Yes. When Yes is selected, the accumulated distance since the last previous Perform Service warning message will be reset to zero because the service interval has been changed. When No is selected, the distance until the next Perform Service warning message is reduced by the accumulated dis- tance since the last previous message. † AUTO DOOR LOCKS? - The options include Yes and No. The default is Yes. When Yes is selected, all doors lock automatically when vehicle speed reaches 25 kilometers-per-hour (15 miles-per-hour). If YES is selected, a second programmable feature appears, AUTO UNLOCK ON EXIT? - The options again include Yes and No. The default is No. When Yes is selected, following each Auto Door Lock event all doors will automatically unlock when the driver
(RKE)
transmitter
if the vehicle is stopped and the door is opened, transmission gear selector is in Park or Neutral. The Auto Door Unlock event will only occur once follow- ing each Auto Door Lock event. † REMOTE UNLOCK - The options include Driver Door 1st and All Doors. The default is Driver Door 1st. When Diver Door 1st is selected, only the driver door unlocks when the Unlock button of the Remote Keyless Entry is depressed once. The Unlock button of the RKE trans- mitter must be depressed twice to unlock all doors. When All Doors is selected, all doors unlock when the Unlock button of the RKE transmitter is depressed once.† SOUND HORN ON LOCK? - The options include On and Off. The default is No. When Yes is selected, a short horn chirp will provide an audible confirmation when the RKE receiver recognizes a valid Lock signal from an RKE transmitter. When No is selected, no horn chirp will occur with the RKE Lock event. This feature may be selected indepen- dent of the FLASH LIGHTS WITH LOCKS? pro- grammable feature. † FLASH LIGHTS WITH LOCKS? - The options include Yes and No. The default is Yes. When Yes is selected, a single flash of the hazard warning lamps will provide an optical confirmation when the RKE receiver recognizes a valid Lock signal from an RKE transmitter, and two flashes of the same lamps will occur when the RKE receiver recognizes a valid Unlock signal from an RKE transmitter. When No is selected, no lamp flash will occur with the RKE Lock or Unlock event. This feature may be selected inde- pendent of the SOUND HORN ON LOCK? pro- grammable feature. † HEADLAMP DELAY = - The options include Off, 30 Sec, 60 Sec, and 90 Sec. The default is 90 Sec. When a time interval is selected, the headlamps will remain on for that length of time when the head- lamps are turned off after the ignition is turned off, or if the Auto mode is selected on vehicles with the Auto Headlamps option. When Off is selected, the headlamp delay feature is disabled.
† TRAIN REMOTE - When this
feature is selected the driver can choose to train up to four remote keyless entry transmitters. The options include Yes and No. The default is No. When Yes is selected and the MENU button is pressed the EVIC will display “PRESS REMOTE LOCK & UNLOCK THEN PRESS UNLOCK”, followed by a chime to indicate the training sequence can commence. You have approximately 30 seconds to train up to four transmitters, after each transmitter is trained a chime will sound indicating that the training was successful. If remote link to memory is “YES” , the first transmitter trained will be associated with
8M - 10 MESSAGE SYSTEMS ELECTRONIC VEHICLE INFO CENTER (Continued)
DR
memory setting 1 and the second transmitter trained will be associated with memory setting 2. Additional transmitters will not be associated with a memory setting. When you have finished training the trans- mitters, press the menu button again and the EVIC will display “TRAIN DONE “X” TRAINED. If no transmitters are trained within approximately 30
seconds the EVIC will display “TRAIN TIMEOUT”.REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the overhead console from the headlin- er.(Refer to 8 - ELECTRICAL/OVERHEAD CON- SOLE - REMOVAL).
Fig.6OVERHEADCONSOLEMODULEREMOVAL 1 - ELECTRONIC VEHICLE INFORMATION MODULE 2 - OVERHEAD CONSOLE
(3) Disconnect the EVIC module electrical connec- tor. Depress the retaining tab and pull straight apart.
(4) Remove the screws holding the EVIC module in
the overhead console (Fig. 6).
(5) Remove EVIC module from console assembly.
INSTALLATION
(1) Position the EVIC module in the overhead con-
sole.
(2) Install the screws holding the EVIC module in
the overhead console.
(3) Connect the EVIC module electrical connector.
(4) Install the overhead console on the headlin- er(Refer to 8 - ELECTRICAL/OVERHEAD CON- SOLE - INSTALLATION).
(5) Connect the battery negative cable. (6) Check EVIC module function.
NOTE: If a new EVIC module has been installed, the compass will have to be calibrated and the variance set. Refer to Compass Variation Adjustment and Compass Calibration in the Standard Procedures section of this group for the procedures.
AMBIENT TEMP SENSOR DESCRIPTION
Ambient air temperature is monitored by the over- head console. The ambient temperature messages are received from the Front Control Module (FCM) over the Programmable Communications Interface (PCI) J1850 data bus circuit. The FCM receives a hard wired input from the ambient temperature sensor (Fig. 7). The ambient temperature sensor is a vari- able resistor mounted to the underside of the hood, in the engine compartment.
Fig.7AmbientTemperatureSensor-Typical
For more information on the front control module, refer to Front Control Module in the Electronic Control Modules section of this manual. For complete circuit diagrams, refer to Wiring. The ambient tem- perature sensor cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.
OPERATION
The ambient
temperature sensor is a variable resistor that operates on a five-volt reference signal sent to it by the Front Control Module. The resis- tance in the sensor changes as temperature changes, changing the temperature sensor signal circuit volt- age to the Front Control Module. Based upon the resistance in the sensor, the Front Control Module senses a specific voltage on the temperature sensor signal circuit, which it is programmed to correspond to a specific temperature. The Front Control Module
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then sends the proper ambient temperature mes-
