DTC Troubleshooting
DTC P0973: Short in Shift Solenoid Valve A CircuitNOTE:
- Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
1. Clear the DTC with the HDS.
2. Test-drive the vehicle for several minutes in the D position through all five gears.
3. Check that DTC P0973 recurs.
Is DTC P0973 indicated?
YES - Go to step 7.
NO - Go to step 4.
4. Choose SHIFT SOLENOID A in MISCELLANEOUS TEST MENU, and test SHIFT SOLENOID VALVE A with the HDS.
Is the system normal?
YES - Go to step 5.
NO - Go to step 7.
5. Test-drive the vehicle for several minutes in the D position through all five gears.
6. Monitor the OBD STATUS for P0973 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES - Go to step 7.
NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check the SH A (BLU/YEL) wire for an intermittent short to body ground between shift solenoid valve A and the PCM. If the screen indicates NOT COMPLETED, return to step 4 and recheck.
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connectors A (31P), B (24P), and C (22P).
10. Measure resistance between PCM connector terminals C1 and A3 or B15.
Is there less than 12 Ohms?
YES - Go to step 11.
NO - Go to step 23.
11. Disconnect the solenoid harness connector at the transmission housing.
12. Check for continuity between PCM connector terminals C1 and A3 or B15.
Is there continuity?
YES - Repair a short to body ground in the wire between PCM connector terminal C1 and the solenoid harness connector, then go to step 17.
NO - Go to step 13.
13. Inspect shift solenoid valve A.
Is shift solenoid valve A OK?
YES - Go to step 14.
NO - Replace shift solenoid valve A, then go to step 17.
14. Disconnect PCM connector D (17P).
15. Turn the ignition switch ON (II).
16. Measure voltage between PCM connector terminals D12 and A3 or B15.
Is there battery voltage?
YES - Go to step 23.
NO - Check for a blown No. 29 fuse in the driver's under-dash fuse/relay box. If the fuse is OK, repair an open in the wire between PCM connector terminal D12 and the driver's under-dash fuse/relay box, then go to step 17.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Clear the DTC with the HDS.
20. Test-drive the vehicle for several minutes in the D position through all five gears.
21. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0973 indicated?
YES - Check for poor connections or loose terminals at shift solenoid valve A and the PCM, then go to step 1.
NO - Go to step 22.
22. Monitor the OBD STATUS for P0973 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - Return to step 7 and recheck.
23. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
24. Test-drive the vehicle for several minutes in the D position through all five gears.
25. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0973 indicated?
YES - Check for poor connections or loose terminals at shift solenoid valve A and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 24. If the PCM was substituted, go to step 1.
NO - Go to step 26.
26. Monitor the OBD STATUS for P0973 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete.
NO - Return to step 7 and recheck.