Chrysler Dodge Caravan 2002 Manual page 492

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INSTRUMENT CLUSTER (Continued)
CONDITION
ERRATIC POINTER
MOVEMENT.
POSSIBLE CAUSES
1. ERRATIC MESSAGE
FROM ANOTHER
MODULE.
2. INTERNAL CLUSTER
FAILURE.
INSTRUMENT CLUSTER
CORRECTION
1.A. CHECK THE BCM USING A DRB III SCAN 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 III SCAN
TOOL. IF OK, GO TO STEP 1.C. IF NOT OK, REFER
TO THE PROPER POWERTRAIN 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:
• A 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.
• THE TCM FOR VEHICLES WITH THE 4 SPEED
ELECTRONIC TRANSMISSIONS. CHECK
CONTINUITY FROM TCM TO PCM. IF OK, USE A
DRB III SCAN TOOL TO CHECK TCM. REFER TO
THE PROPER TRANSMISSION DIAGNOSTIC
PROCEDURES MANUAL TO REPAIR THE TCM. IF
NOT OK, REPAIR WIRING.
2.A. PERFORM CLUSTER SELF-DIAGNOSTIC TEST
AND CHECK FOR FAULT CODES.
• IF THE POINTER MOVES DURING TEST BUT
STILL APPEARS ERRATIC, THEN GO TO STEP 2.B.
2.B. REPLACE CLUSTER ASSEMBLY.
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