CHRYSLER VOYAGER 2001 Service Manual

CONDITION POSSIBLE CAUSES CORRECTION
ERRATIC POINTER
MOVEMENT1. ERRATIC MESSAGE
FROM ANOTHER
MODULE.1.A. CHECK THE BCM USING A DRB IIITSCAN
TOOL IF OK, GO TO STEP 1.B. IF NOT OK, REFER
TO THE PROPER BODY DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE BCM.
1.B. CHECK THE PCM USING A DRB IIITSCAN
TOOL. IF OK, GO TO STEP 1.C. IF NOT OK, REFER
TO THE ENGINE DIAGNOSTIC PROCEDURES
MANUAL TO REPAIR THE PCM.
1.C. CHECK THE SPEED SIGNAL INPUT INTO THE
PCM. THE SPEED SIGNAL ORIGINATES FROM ONE
OF THE FOLLOWING SOURCES:
²A DISTANCE SENSOR FOR VEHICLES WITH 3
SPEED AUTOMATIC TRANSMISSION. CHECK
CONTINUITY FROM DISTANCE SENSOR TO PCM.
IF OK, REPLACE DISTANCE SENSOR. IF NOT OK,
REPAIR WIRING.
²THE TCM FOR VEHICLES WITH THE 4 SPEED
ELECTRONIC TRANSMISSIONS. CHECK
CONTINUITY FROM TCM TO ENGINE
CONTROLLER. IF OK, USE A DRB IIITSCAN TOOL
TO CHECK TCM. REFER TO THE PROPER
TRANSMISSION DIAGNOSTIC PROCEDURES
MANUAL TO REPAIR THE TCM. IF NOT OK, REPAIR
WIRING.
2. INTERNAL CLUSTER
FAILURE.2.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, THEN GO TO STEP 2.B.
2.B. REPLACE CLUSTER ASSEMBLY.
RSINSTRUMENT CLUSTER8J-5
INSTRUMENT CLUSTER (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
SPEEDOMETER
INACCURATE.1. SPEEDOMETER OUT
OF CALIBRATION.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
²IF SPEEDOMETER IS ACCURATE TO THE
CALIBRATION POINTS THEN LOOK FOR ANOTHER
POSSIBLE CAUSE OF INACCURACY.
²IF SPEEDOMETER IS NOT ACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER
ASSEMBLY.
2. WRONG
SPEEDOMETER PINION
SIZE FOR TIRE SIZE.2.A. IF VEHICLE HAS A 4 SPEED ELECTRONIC
TRANSMISSION GO TO STEP 2.C. OTHERWISE GO
TO STEP 2.B.
2.B. CHECK IF CORRECT SPEEDOMETER PINION
IS BEING USED WITH TIRES ON VEHICLE. REFER
TO TRANSMISSION FOR DIAGNOSIS AND
TESTING.
²IF THE INCORRECT PINION IS IN TRANSMISSION
THEN REPLACE WITH CORRECT PINION.
²IF THE CORRECT PINION IS IN THE
TRANSMISSION, CHECK TIRE SIZE.
2.C. USE A DRB IIITSCAN TOOL TO CHECK THE
TCM TO SEE IF THE CORRECT TIRE SIZE HAS
BEEN PROGRAMMED INTO THE TCM.
²IF THE INCORRECT TIRE SIZE WAS SELECTED,
SELECT THE PROPER TIRE SIZE.
²IF THE CORRECT TIRE SIZE WAS SELECTED,
CHECK SPEED SENSOR.
3. BAD SPEED SENSOR. 3. REFER TO TRANSMISSION, SPEED SENSOR,
DIAGNOSIS AND TESTING.
TACHOMETER DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO POINTER
MOVEMENT1. INTERNAL
CLUSTER FAILURE.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST AND
CHECK FOR FAULT CODES.
²IF TACHOMETER POINTER MOVES TO CALIBRATION
POINTS DURING TEST, LOOK FOR ANOTHER
POSSIBLE CAUSE OF FAILURE.
²
IF THE POINTER DOESN'T MOVE DURING TEST,
CHECK FOR POWER AND GROUND TO THE MIC.
IF POWER AND GROUND ARE PRESENT GO TO
STEP 1.B.
1.B. REPLACE CLUSTER. GO TO STEP 1.C.
2.9NO RPM9PCI BUS
MESSAGE OR9ZERO
RPM9PCI BUS
MESSAGE FROM
PCM.2. CHECK THE PCM USING A DRB IIITSCAN TOOL.
REFER TO THE PROPER ENGINE DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE AND
REPAIR.
8J - 6 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
ERRATIC POINTER
MOVEMENT.1. BAD PCI BUS
MESSAGE FROM
PCM.1. CHECK THE PCM USING A DRB IIITSCAN TOOL.
REFER TO THE PROPER ENGINE DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE AND
REPAIR.
2. INTERNAL
CLUSTER FAILURE.2.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST AND
CHECK FOR FAULT CODES.
²IF THE POINTER MOVES DURING TEST BUT STILL
APPEARS ERRATIC, REPLACE CLUSTER ASSEMBLY.
TACHOMETER
INACCURATE.1. TACHOMETER OUT
OF CALIBRATION.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
²IF TACHOMETER IS ACCURATE TO THE CALIBRATION
POINTS, LOOK FOR ANOTHER POSSIBLE CAUSE OF
INACCURACY.
²IF TACHOMETER IS NOT ACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER ASSEMBLY.
FUEL GAUGE DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO POINTER
MOVEMENT.1. INTERNAL CLUSTER
FAILURE.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
²IF FUEL GAUGE POINTER MOVES TO
CALIBRATION POINTS, LOOK FOR ANOTHER
POSSIBLE CAUSE OF FAILURE.
²IF THE POINTER DOESN'T MOVE DURING TEST,
VERIFY POWER AND GROUND ARE BEING
PROVIDED TO THE CLUSTER. IF YES, REPLACE
CLUSTER ASSEMBLY. IF NO, DETERMINE CAUSE
OF NO POWER OR GROUND.
2. NO PCI FUEL
MESSAGE OR EMPTY
PCI BUS MESSAGE
FROM BODY
CONTROLLER.2.A. CHECK THE BCM USING A DRB IIITSCAN
TOOL. IF OK, GO TO STEP 2.B. IF NOT OK, REFER
TO THE PROPER BODY DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE
AND REPAIR.
2.B. REFER TO THE FUEL SECTION OF THE
SERVICE MANUAL FOR THE FUEL LEVEL SENDING
UNIT TEST PROCEDURE. TEST UNIT AND REPAIR
AS INSTRUCTED.
ERRATIC POINTER
MOVEMENT.1. BAD PCI FUEL
MESSAGE FROM THE
BODY CONTROLLER.1.A. USE A DRB IIITSCAN TOOL TO CHECK THE
BCM. IF OK, GO TO STEP 2.B. IF NOT OK, REFER
TO THE PROPER BODY DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE
AND REPAIR.
2.B. REFER TO THE FUEL SECTION OF THE
SERVICE MANUAL FOR THE FUEL LEVEL SENDING
UNIT TEST PROCEDURE. TEST UNIT. IF OK, LOOK
FOR ANOTHER POSSIBLE CAUSE FOR FUEL
GAUGE FAILURE. IF NOT OK, REPAIR SENDING
UNIT.
RSINSTRUMENT CLUSTER8J-7
INSTRUMENT CLUSTER (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
2. INTERNAL CLUSTER
FAILURE.2. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, REPLACE CLUSTER
ASSEMBLY.
FUEL GAUGE
INACCURATE.1. FUEL GAUGE OUT OF
CALIBRATION.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST. IF
POINTER IS ACCURATE TO THE CALIBRATION
POINTS LOOK FOR ANOTHER POSSIBLE CAUSE
OF FAILURE. IF POINTER IS INACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER
ASSEMBLY.
2. FUEL LEVEL SENDING
UNIT IS OUT OF
CALIBRATION.2. REFER TO THE FUEL SECTION OF THE SERVICE
MANUAL FOR TESTING AND REPAIR PROCEDURE.
TEMPERATURE GAUGE DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO POINTER
MOVEMENT1. INTERNAL CLUSTER
FAILURE.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK.
²IF TEMPERATURE GAUGE POINTER MOVES TO
CALIBRATION POINTS, LOOK FOR ANOTHER
POSSIBLE CAUSE OF FAILURE.
²IF THE POINTER DOESN'T MOVE DURING TEST,
VERIFY POWER AND GROUND ARE BEING
PROVIDED TO THE CLUSTER. IF YES, REPLACE
CLUSTER. IF NO, DETERMINE CAUSE OF NO
POWER OR NO GROUND.
2. NO PCI
TEMPERATURE
MESSAGE OR COLD PCI
BUS MESSAGE FROM
THE POWERTRAIN
CONTROL MODULE.2.A. CHECK PCM FAULT CODES USING A DRB IIIT
SCAN TOOL. IF THERE ARE NO FAULTS, GO TO
STEP 2.B. IF THERE ARE FAULTS, REFER TO THE
PROPER ENGINE DIAGNOSTIC PROCEDURES
MANUAL TO PROPERLY DIAGNOSE AND REPAIR.
2.B. REFER TO FUEL, COOLANT TEMPERATURE
SENSOR, DIAGNOSIS AND TESTING. REPAIR
SENSOR AS NEEDED.
ERRATIC POINTER
MOVEMENT.1. BAD PCI BUS
MESSAGE FROM THE
POWERTRAIN CONTROL
MODULE.1.A. CHECK PCM FAULT CODES USING A DRB IIIT
SCAN TOOL. IF THERE ARE NO FAULTS, GO TO
STEP 1.B. IF THERE ARE FAULTS, REFER TO THE
ENGINE DIAGNOSTIC PROCEDURES MANUAL TO
PROPERLY DIAGNOSE AND REPAIR.
1.B. REFER TO FUEL, COOLANT TEMPERATURE
SENSOR, DIAGNOSIS AND TESTING. REPAIR
SENSOR AS NEEDED.
2. INTERNAL CLUSTER
FAILURE.2. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, REPLACE CLUSTER
ASSEMBLY.
8J - 8 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
TEMPERATURE GAUGE
INACCURATE.1. TEMPERATURE
GAUGE OUT OF
CALIBRATION.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
²IF POINTER IS ACCURATE TO THE CALIBRATION
POINTS LOOK FOR ANOTHER POSSIBLE CAUSE
OF FAILURE.
²IF POINTER IS INACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER
ASSEMBLY.
2. COOLANT SENSOR
OUT OF CALIBRATION.2. REFER TO FUEL, COOLANT TEMPERATURE
SENSOR FOR TEST AND REPAIR PROCEDURE.
ODOMETER DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO DISPLAY 1. NO PCI BUS
ODOMETER MESSAGE
FROM BCM.1. USE A DRB IIITSCAN TOOL TO CHECK THE
BCM. REFER TO THE PROPER BODY DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE
AND REPAIR.
2. INTERNAL CLUSTER
FAILURE.2. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF ODOMETER PASSES THE SEGMENT CHECK,
LOOK FOR ANOTHER POSSIBLE CAUSE OF
FAILURE. IF IT FAILS VERIFY POWER AND
GROUND ARE BEING PROVIDED TO THE
CLUSTER. IF YES, REPLACE CLUSTER. IF NO,
DETERMINE CAUSE OF NO POWER OR GROUND.
ERRATIC DISPLAY 1. INTERNAL CLUSTER
FAILURE.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF ODOMETER PASSES THE SEGMENT TEST,
FAILURE MAY NOT BE IN THE CLUSTER. LOOK
FOR ANOTHER POSSIBLE CAUSE OF FAILURE.
VERIFY GOOD POWER AND GROUND
CONNECTIONS. IF CONNECTIONS ARE GOOD AND
NO OTHER PROBLEMS ARE FOUND, REPLACE
CLUSTER ASSEMBLY.
2. BAD PCI BUS
MESSAGE FROM THE
BCM.2. USE A DRB IIITSCAN TOOL TO CHECK THE
BCM. REFER TO THE PROPER BODY DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE
AND REPAIR.
ODOMETER WON'T GO
INTO TRIP MODE.1. TRIP SWITCH
DOESN'T WORK.1. IF CLUSTER WILL NOT GO INTO SELF
DIAGNOSTIC MODE AND CANNOT TOGGLE
BETWEEN ODOMETER AND TRIP ODOMETER,
REPLACE CLUSTER.
TRIP ODOMETER WON'T
RESET.1. RESET SWITCH
DOESN'T WORK.1. IF CLUSTER WILL NOT GO INTO SELF
DIAGNOSTIC MODE AND TRIP ODOMETER WILL
NOT RESET, REPLACE CLUSTER.
RSINSTRUMENT CLUSTER8J-9
INSTRUMENT CLUSTER (Continued)

ELECTRONIC GEAR INDICATOR DISPLAY DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
NO DISPLAY 1. INTERNAL CLUSTER
FAILURE.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF PRND3L (PRND1234 IF AUTOSTICK
EQUIPPED) PASSES THE SEGMENT CHECK, THEN
FAILURE MAY NOT BE IN THE CLUSTER. LOOK
FOR ANOTHER POSSIBLE CAUSE OF FAILURE. IF
IT FAILS, REPLACE CLUSTER ASSEMBLY.
ERRATIC DISPLAY 1. INTERNAL CLUSTER
FAILURE.1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
²IF PRND3L (PRND1234 IF AUTOSTICK
EQUIPPED) PASSES THE SEGMENT CHECK, THEN
FAILURE MAY NOT BE IN THE CLUSTER. LOOK
FOR ANOTHER POSSIBLE CAUSE OF FAILURE.
2. BAD PCI BUS
MESSAGE FROM THE
TCM.2. USE A DRB IIITSCAN TOOL TO CHECK THE
TCM. REFER TO THE PROPER TRANSMISSION
DIAGNOSTIC PROCEDURES MANUAL TO
PROPERLY DIAGNOSE AND REPAIR.
ALL SEGMENTS ARE ON 1. NO PCI BUS
MESSAGE FROM THE
TCM.1.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
IF PRND3L (PRND1234 IF AUTOSTICK EQUIPPED)
PASSES TEST GO TO STEP 1.B. IF PRND3L
(PRND1234 IF AUTOSTICK EQUIPPED) FAILS TEST,
REFER TO THE PROPER TRANSMISSION
DIAGNOSTIC PROCEDURES MANUAL.
1.B. CHECK THE TCM USING A DRB IIITSCAN
TOOL. REFER TO THE PROPER TRANSMISSION
DIAGNOSTIC PROCEDURES MANUAL TO
PROPERLY DIAGNOSE AND REPAIR.
MECHANICAL TRANSMISSION RANGE INDICATOR (PRND21) DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
INDICATOR DOES NOT
SHOW PROPER GEAR
OR NO INDICATION.MIS-ADJUSTED 1.A. VERIFY TRANSMISSION SHIFT SYSTEM IS
CORRECTLY ADJUSTED.
1.B. VERIFY CORRECT ROUTING AND
ATTACHMENT OF PRNDL CABLE AND GUIDE TUBE.
1.C. RE-ADJUST PRNDL INDICATOR IN NEUTRAL
USING ADJUSTER WHEEL BELOW STEERING
COLUMN.
INDICATOR DOES NOT
FOLLOW GEAR SHIFT
LEVER.NOT ATTACHED 1.A. VERIFY INDICATOR CABLE CONNECTED TO
SHIFT LEVER PIN IN THE GROOVE.
1.B. VERIFY THAT THE INDICATOR CLIP IS SECURE,
AND ATTACHED TO THE MOUNTING BRACKET.
MAKE SURE THAT THE CLIP IS NOT BROKEN. IF
THE CLIP IS BROKEN, REPLACE CLIP ON
INDICATOR.
8J - 10 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)

CONDITION POSSIBLE CAUSES CORRECTION
INDICATOR DOES NOT
MAKE FULL TRAVEL (ªPº
< > ª1º).1. CABLE DISLODGED
FROM ITS PATH ON THE
INDICATOR BASE.1. VERIFY CORRECT ATTACHMENT OF INDICATOR
CABLE TO SHIFT LEVER PIN (UNDER HOOP OF
TRANS. SHIFT CABLE) AND CLIP ONTO THE
MOUNTING BRACKET.
2. INCORRECT
ATTACHMENT OF CABLE
TO SHIFT LEVER PIN.2. VERIFY INDICATOR TRAVEL BY PULLING ON
CABLE GENTLY OVER FULL TRAVEL RANGE. IF
THERE IS STILL A PROBLEM, REMOVE CLUSTER
TO ACCESS INDICATOR BASE AND CONFIRM
CABLE PATH.
REMOVAL
WITH ELECTRONIC TRANSMISSION RANGE
INDICATOR
(1) Disconnect and isolate the battery negative
cable.
(2) Remove Over Steering Column Bezel by lifting
it straight up with a firm pull.
(3) Remove the four cluster bezel attaching screws.
(4) Tilt the steering column in the full down posi-
tion.
(5) Pull rearward on the cluster bezel and remove.
(6) Remove the four screws holding instrument
cluster to instrument panel.
(7) Rotate top of cluster outward.
(8) Disconnect the cluster harness connector.
(9) Remove instrument cluster from instrument
panel.
WITH MECHANICAL TRANSMISSION RANGE
INDICATOR
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the lower steering column cover. Refer
to Body, Instrument Panel, Lower Steering Column
Cover, Removal.
(3) Remove the plastic knee blocker reinforcement.
Refer to Body, Instrument Panel, Knee Blocker Rein-
forcement, Removal.
(4) Disconnect the transmission range indicator
cable end from shift lever by flexing the HOOP on
the transmission shift cable rearward and slip the
indicator cable loop off the lever pin.
(5) Disconnect the clip holding the indicator cable
to the mounting bracket.
(6) Remove Over Steering Column Bezel by lifting
it straight up with a firm pull.
(7) Remove the four bezel attaching screws.
(8) Tilt the steering column in the full down posi-
tion.
(9) Pull rearward on the cluster bezel and remove.
(10) Remove the four cluster attaching screws.
(11) Rotate top of the cluster rearward.(12) Disconnect the cluster harness connector.
(13) Remove the instrument cluster carefully while
guiding the range indicator cable and guide tube
through the opening to avoid any damage.
INSTALLATION
WITH ELECTRONIC TRANSMISSION RANGE
INDICATOR
(1) Connect the instrument cluster wire connector.
(2) Rotate top of cluster inward as placing into
instrument panel opening.
(3) Install the four screws holding instrument clus-
ter to instrument panel.
(4) Position cluster bezel into place.
(5) Install the four bezel attaching screws.
(6) Install the Over Steering Column Bezel by
firmly snapping into place.
(7) Connect the battery negative cable.
WITH MECHANICAL TRANSMISSION RANGE
INDICATOR
(1) Guide the range indicator cable and guide tube
through the opening of instrument panel.
(2) Connect the instrument cluster wire connector.
(3) Rotate top of cluster inward as placing into
instrument panel opening.
(4) Install the four screws holding instrument clus-
ter to instrument panel.
(5) Position cluster bezel into place.
(6) Install the four bezel attaching screws.
(7) Install the Over Steering Column Bezel by
firmly snapping into place.
(8) Connect the clip holding the indicator cable to
the mounting bracket.
(9) Connect the transmission range indicator cable
end to the shift lever by flexing the HOOP on the
transmission shift cable forward and slip the indica-
tor cable loop on the lever pin.
(10) Install the plastic knee blocker reinforcement.
Refer to Body, Instrument Panel, Knee Blocker Rein-
forcement, Installation.
RSINSTRUMENT CLUSTER8J-11
INSTRUMENT CLUSTER (Continued)

(11) Install the lower steering column cover. Refer
to Body, Instrument Panel, Lower Steering Column
Cover, Installation.
(12) Connect the battery negative cable.
CLUSTER LENS
REMOVAL
(1) Remove the instrument cluster. Refer to Elec-
trical, Instrument Cluster, Removal.
(2) Remove the screws holding the lens to the
instrument cluster.
(3) Press down on the snap features of the lens
and remove the lens from the cluster.
INSTALLATION
(1) Insert the lens snap features into the cluster.
(2) Install the screws holding the lens to the
instrument cluster.
(3) Install the instrument cluster. Refer to Electri-
cal, Instrument Cluster, Installation.
MECHANICAL TRANSMISSION
RANGE INDICATOR
REMOVAL
(1) Remove the instrument cluster and disconnect
the range indicator cable at both attaching points.
Refer to Electrical, Instrument Cluster, Removal.
(2) From the backside of the cluster, remove two
screws holding the mechanical transmission rangeindicator and then remove it fromt instrument clus-
ter.
INSTALLATION
(1) Insert the mechanical transmission range indi-
cator into the backside of the instrument cluster and
install the two screws.
(2) Install the instrument cluster. Refer to Electri-
cal, Instrument Cluster, Installation.
RED BRAKE WARNING
INDICATOR
DESCRIPTION
The red BRAKE warning indicator (lamp) is
located in the instrument panel cluster and is used to
indicate a low brake fluid condition or that the park-
ing brake is applied. In addition, the brake warning
indicator is turned on as a bulb check by the ignition
switch every time the ignition switch is placed in the
crank position.
OPERATION
The red BRAKE warning indicator (lamp) is sup-
plied a 12-volt ignition feed anytime the ignition
switch is on. The bulb is then illuminated by com-
pleting the ground circuit either through the switch
on the parking brake lever, the brake fluid level
switch in the master cylinder reservoir, or the igni-
tion switch when it is placed in the crank position.
8J - 12 INSTRUMENT CLUSTERRS
INSTRUMENT CLUSTER (Continued)

INSTRUMENT CLUSTER
TABLE OF CONTENTS
page page
INSTRUMENT CLUSTER
DESCRIPTION............................1OPERATION.............................1
INSTRUMENT CLUSTER
DESCRIPTION
WATER IN FUEL LAMP
The Water In Fuel Lamp is located in the instru-
ment cluster. When moisture is found within the fuel
system, the sensor sends a message via the PCI data
bus to the instrument cluster. The sensor is located
underneath the vehicle, directly above the rear axle.
The sensor is housed within the fuel filter/water sep-
arator assembly cover. The sensor is not serviced sep-
arately. If found defective, the entire assembly cover
must be replaced.
OPERATION
WATER IN FUEL LAMP
The Water In Fuel Sensor is a resistive type
switch. It is calibrated to sense the different resis-
tance between diesel fuel and water. When water
enters the fuel system, it is caught in the bottom of
the fuel filter/water separator assembly, where the
sensor is located. Water has less resistance than die-
sel fuel. The sensor then sends a PCI data bus mes-
sage to the instrument cluster to illuminate the
lamp.
If the lamp is inoperative, perform the self diag-
nostic test on the instrument cluster to check the
lamp operation before continuing diagnosis.
RGINSTRUMENT CLUSTER8Ja-1