Gauge Control Module Input Test
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NOTE:
- Before testing, do the gauge control module self-diagnosis function (see SELF-DIAGNOSTIC FUNCTION ), and make sure the B-CAN communication lines are OK.
- Before testing, troubleshoot the multiplex integrated control system first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Turn the ignition switch to LOCK (0).
- Remove the gauge control module (see GAUGE CONTROL MODULE REPLACEMENT ), and disconnect the gauge control module 32P connector (A) from it.
- 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, do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, go to step 5.GAUGE CONTROL MODULE INPUT TEST RESULT
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 16 BLU Combination light switch ON Connect to ground with a jumper wire: The dashlights should come on full bright. - Faulty bulbs
- An open or high resistance in the wire
15 RED Combination light switch ON Connect to ground with a jumper wire: The dashlights should come on full bright. - Faulty LEDs
- An open or high resistance in the wire
8 GRN Ignition switch ON (II), turn signal switch in RIGHT Measure the voltage to ground: There should be battery voltage when the lights are flashing. - Faulty MICU
- Faulty combination light switch
- An open or high resistance in the wire
7 BLU Ignition switch ON (II), turn signal switch in LEFT Measure the voltage to ground: There should be battery voltage when the lights are flashing. - Faulty MICU
- Faulty combination light switch
- An open or high resistance in the wire
23 WHT Battery sensor 2P connector disconnected Check for continuity between terminal No. 23 and battery sensor 2P connector terminal No. 1: There should be continuity. An open in the UART wire Check for continuity to ground:
There should be no continuity.A short to ground in the UART wire
- Reconnect the 32P connector to the gauge control module, and do the following input tests:
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If the input test proves OK, the gauge control module must be faulty; replace it (see GAUGE CONTROL MODULE REPLACEMENT
).GAUGE CONTROL MODULE INPUT TEST RESULT
Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 1 GRN Under all conditions Measure the voltage to ground: There should be battery voltage. - Blown No. B16 (10 A) fuse in the under-hood fuse/relay box
- An open or high resistance in the wire
17 GRN Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. - Blown No. C11 (7.5 A) fuse in the driver's under-dash fuse/relay box
- An open or high resistance in the wire
4 BLK In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground (G401)
- An open or high resistance in the ground wire
31 BRN In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground (G402)
- An open or high resistance in the ground wire
32 BRN In all ignition switch positions Measure the voltage to ground: There should be less than 0.2 V. - Poor ground (G402)
- An open or high resistance in the ground wire
12 GRY Ignition switch ON (II), washer fluid is full level in the reservoir Measure the voltage to ground: There should be about 5 V. - Faulty brake fluid level switch
- A short to ground in the wire
Ignition switch ON (II), washer fluid is at a lower level in the reservoir Measure the voltage to ground: There should be less than 0.2 V. - Faulty washer fluid level switch
- Poor ground (G204) or an open in the ground wire
- An open or high resistance in the wire
27 ORN Ignition switch ON (II), brake fluid level is full in the reservoir Measure the voltage to ground: There should be battery voltage. - Faulty brake fluid level switch
- A short to ground in the wire
Ignition switch ON (II), brake fluid level is lower in the reservoir Measure the voltage to ground: There should be less than 0.2 V. - Faulty brake fluid level switch
- Poor ground (G302) or an open in the ground wire
- An open or high resistance in the wire
28 YEL Ignition switch ON (II), parking pedal released Measure the voltage to ground: There should be battery voltage. - Faulty brake fluid level switch
- A short to ground in the wire
Ignition switch ON (II), parking pedal pressed Measure the voltage to ground: There should be less than 0.2 V. - Faulty parking brake switch
- Faulty parking brake switch ground
- An open or high resistance in the wire