Gauge Control Module Input Test
NOTE:
Before testing, do the gauge control module self-diagnosis procedure, and make sure the B-CAN communication line is OK.
- Turn the ignition switch OFF.
- Remove the gauge control module and disconnect the 36P connector from it (see GAUGE CONTROL MODULE REPLACEMENT ).
- inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals are OK, go to step 4.
- With the connector still disconnected, make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, go to step 5.REFERENCE TABLE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 26 RED Combination light switch ON Attach to ground: The illuminations of the steering wheel switches come on full bright. - Faulty LEDs
- An open in the wire
- Reconnect the connector to the gauge control module, and make these input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the gauge control module must be faulty; replace it.REFERENCE TABLE
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 18 BLK Under all conditions Measure voltage to ground: There should be less than 0.5 V. - Poor ground(G502)
- An open in the wire
36 BLK Under all conditions Measure voltage to ground: There should be less than 0.5 V. - Poor ground(G502)
- An open in the wire
2 YEL Ignition switch ON (II) Measure voltage to ground: There should be battery voltage. - Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
- An open in the wire
3 WHT/RED Under all conditions Measure voltage to ground: There should be battery voltage. - Blown No. 9 (10 A) fuse in the under-hood fuse/relay box
- An open in the wire
13 GRN/YEL Ignition switch ON (II), turn signal switch in RIGHT Measure voltage to ground: There should be battery voltage when the lights are flashing. - Faulty under-dash fuse/relay box
- Faulty combination light switch
- Faulty turn signal/hazard relay
- Hazard warning switch
- An open in the wire
14 GRN/RED Ignition switch ON (II), turn signal switch in LEFT Measure voltage to ground: There should be battery voltage when the lights are flashing. - Faulty under-dash fuse/relay box
- Faulty combination light switch
- Faulty turn signal/hazard relay
- Hazard warning switch
- An open in the wire
5 GRN Ignition switch ON (II), brake fluid is full level in the reservoir Measure voltage to ground: There should be 10 V or more. - Faulty brake fluid level switch
- A short to ground in the wire
Ignition switch ON (II), brake fluid is lower level in the reservoir Measure voltage to ground: There should be less than 0.5 V. - Poor ground(G401)
- Faulty brake fluid level switch
- An open in the wire
23 (Canada models) GRN/BLK Ignition switch ON (II), washer fluid is half or more in the washer reservoir Measure voltage to ground: There should be battery voltage - Faulty washer fluid level switch
- A short to ground in the wire
Ignition switch ON (II), washer fluid is empty in the washer reservoir Measure voltage to ground: There should be less than 0.5 V. - Poor ground(G201)
- Faulty washer brake fluid level switch
- An open in the wire