A/T Gear Position Indicator Circuit Troubleshooting

A/T Gear Position Indicator Circuit Troubleshooting

Symptom: A/T gear position indicator does not indicate the shift lever position, the D indicator does not blink, and no transmission range switch, CAN line DTCs are indicated.

1. Check the indicator drive circuit and communication line in the gauge control module with the gauge control module self-diagnostic function.
Is the system OK ?
YES-Go to step 2.
NO-Record the ODO data in the old gauge control module using the HDS, and replace the gauge control module. Input the old ODO data in the new gauge control module with the HDS.
2. Remove the gauge control module.
3. Turn the ignition switch ON.





4. Measure the voltage between gauge control module connector terminal A1 and body ground. The shift lever can be in any position.
Is there battery voltage?
YES-Faulty A/T gear position indicator in the gauge control module, replace the gauge control module.
NO-Go to step 5.





5. Measure the voltage between PCM connector terminal A31 and body ground.
Is there battery voltage?
YES-Repair open or short in the wire between PCM connector terminal A31 and the gauge control module connector terminal A1.
NO-Go to step 6.
6. Jump the SCS line with the HDS.
7. Disconnect PCM connectors (31P).





8. Check for continuity between PCM connector terminal A31 and body ground.
Is there continuity?
YES-Repair short to ground in the wire between PCM connector terminal A31 and the gauge control module connector terminal A1.
NO-Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck.