Chrysler Dodge Caravan 2002 Manual page 494

RS
INSTRUMENT CLUSTER (Continued)
CONDITION
ERRATIC POINTER
MOVEMENT.
TACHOMETER
INACCURATE.
CONDITION
NO POINTER
MOVEMENT.
POSSIBLE CAUSES
1. BAD PCI BUS
MESSAGE FROM
PCM.
2. INTERNAL
CLUSTER FAILURE.
TACHOMETER OUT
OF CALIBRATION.
FUEL GAUGE DIAGNOSIS
POSSIBLE CAUSES
1. INTERNAL CLUSTER
FAILURE.
2. NO PCI FUEL
MESSAGE OR EMPTY
PCI BUS MESSAGE
FROM BODY CONTROL
MODULE.
CORRECTION
1. CHECK THE PCM USING A DRB III SCAN TOOL.
REFER TO THE PROPER POWERTRAIN DIAGNOSTIC
PROCEDURES MANUAL TO PROPERLY DIAGNOSE AND
REPAIR.
2. PERFORM CLUSTER SELF-DIAGNOSTIC TEST AND
CHECK FOR FAULT CODES.
• IF THE POINTER MOVES DURING TEST BUT STILL
APPEARS ERRATIC, REPLACE CLUSTER ASSEMBLY.
PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
• IF TACHOMETER IS ACCURATE TO THE CALIBRATION
POINTS, LOOK FOR ANOTHER POSSIBLE CAUSE OF
INACCURACY.
• IF TACHOMETER IS NOT ACCURATE TO THE
CALIBRATION POINTS, REPLACE CLUSTER ASSEMBLY.
1. PERFORM CLUSTER SELF-DIAGNOSTIC TEST.
• IF FUEL GAUGE POINTER MOVES TO
CALIBRATION POINTS, LOOK FOR ANOTHER
POSSIBLE CAUSE OF FAILURE.
• IF 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.A. CHECK THE BCM USING A DRB III SCAN
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.
INSTRUMENT CLUSTER
CORRECTION
8J - 7