P0977
DTC P0977: Open in Shift Solenoid Valve B Circuit2005-2006 Models
NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot. 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 1st, 2nd and 3rd gears in the D3 position.
3. Check that DTC P0977 recurs.
Is DTC P0977 indicated?
YES - Go to step 7.
NO - Go to step 4.
4. Choose Shift Solenoid B in Miscellaneous Test Menu, and test the shift solenoid valve B with the HDS.
5. Test-drive the vehicle for several minutes in 1st, 2nd and 3rd gears in the D3 position.
6. Monitor the OBD status for P0977 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a failed?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at shift solenoid valve B and PCM. If the tester 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) and C (22P).
10. Measure the resistance between PCM connector terminals C4 and A9.
Is there 12 - 25 ohms?
YES - Check for loose or poor connections at PCM connector terminal C4. If the connection is OK, 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 11.
11. Disconnect the shift solenoid harness connector at the transmission housing.
12. Measure the resistance between shift solenoid harness connector terminal No. 2 and body ground.
Is there 12 - 25 ohms?
YES - Repair open in the wire between PCM connector terminal C4 and the shift solenoid harness connector, then go to step 13.
NO - Check shift solenoid valve B, and check for an open in the shift solenoid harness in the transmission. Replace shift solenoid valve B and/or shift solenoid harness, then go to step 13.
13. Clear the DTC with the HDS.
14. Test-drive the vehicle for several minutes in 1st, 2nd, and 3rd gears in the D3 position.
15. Monitor the OBD status for P0977 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a passed?
YES - Troubleshooting is completed.
NO - Return to step 7 and recheck.