All Gauges Do Not Operate
NOTE:
For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Turn ignition on. Using scan tool, select ELECTRO/MECHANICAL cluster. If scan tool displays NO RESPONSE or CCD BUS FAILURE, go to appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display NO RESPONSE or CCD BUS FAILURE, go to next step.
- Using scan tool, read DTCs. If scan tool displays ROM TEST FAILURE, recalibrate all gauges. If scan tool displays RAM TEST FAILURE, replace instrument cluster printed circuit. If scan tool displays BODY COMPUTER ODOMETER FAILURE, replace BCM. If scan tool displays NO MESSAGE FROM BCM, PCM or TCM, go to appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display any of the listed messages, go to next step.
- Using scan tool, select BODY, then BODY COMPUTER, then INPUT/OUTPUT. Read ignition unlock status. If scan tool displays IGNITION UNLOCK: CLOSED, go to next step. If scan tool does not display IGNITION UNLOCK: CLOSED, go to appropriate VEHICLE COMMUNICATIONS article.
- Using scan tool, select BODY, then ELECTOR/MECH CLUSTER (MIC). Select ACTUATOR TEST, then actuate ALL GAUGES. If gauges move from lower to upper limits, replace Body Control Module (BCM). BCM is located with junction block under driver's side instrument panel. See Figure . If gauges do not operate, replace instrument cluster circuit board. Using scan tool, recalibrate gauges.