P0763

DTC P0763: Problem in Shift Solenoid Valve C Circuit

NOTE: Record all freeze data before you troubleshoot.

1. Turn the ignition switch OFF.
2. Disconnect PCM connectors A (31P) and C (22P).
3. Turn the ignition switch ON (II).





4. Measure the voltage between PCM connector terminals C2 and A23 or A24.
Is there voltage?
YES - Repair short to power in the wire between PCM connector terminal C2 and the shift solenoid valve C.
NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the shift solenoid harness connector at the transmission housing.





7. Check for continuity between PCM connector terminals C2 and A23 or A24.
Is there continuity?
YES - Repair short to ground in the wire between PCM connector terminal C2 and the shift solenoid harness connectors
NO - Go to step 8.
8. Connect the shift solenoid harness connector.





9. Measure the resistance between PCM connector terminals C2 and A23 or A24.
Is there 12 - 25 ohms?
YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.
NO - Go to step 10.
10. Disconnect the shift solenoid harness connector.





11. Check for continuity between PCM connector terminal C2 and the No. 1 terminal of the shift solenoid harness connector.
Is there continuity?
YES - Check the shift solenoid valve C, and check for an open in the shift solenoid harness in the transmission.
NO - Repair open in the wire between PCM connector terminal C2 and the shift solenoid harness connector.