P0977

DTC P0977: Open in Shift Solenoid Valve B Circuit

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. Select SHIFT SOL TEST in MISC. TEST MENU, then carry out A/T SHIFT SOL B test in SHIFT SOL TEST MENU with the HDS.
5. Test-drive the vehicle for several minutes in 1st, 2nd and 3rd gears in the [D3] position.
6. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0977.
Did the result indicate a fail?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the shift solenoid valve B and PCM. If the tester indicates NOT COMPLETE, 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 A8 or 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. Check the OBD STATUS in DTCs MENU for a pass/fail test of code P0977.
Did the result indicate a pass?
YES - The problem has been corrected.
NO - Return to step 1 and recheck.