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 the D5 position in all five gears.
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 the D5 position in all five gears.
6. Check the OBD STATUS in DTCs MENU for a pass/fail test for code P0977.
Did the result indicate a fail?
YES - Go to step 7.
NO - Intermittent failure, the system is OK at this time. 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 connector A (73P).





10. Measure the resistance between PCM connector terminals A12 and A39 or A40.
Is there 12 - 25 ohms ?
YES - Check for loose or poor connections at PCM connector terminal A12. If the connections are 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. Inspect shift solenoid valve B.
Is shift solenoid valve B OK?
YES - Go to step 12.
NO - Replace shift solenoid valve B, then go to step 14.
12. Remove the solenoid harness.





13. Check for continuity between solenoid harness connector terminal No.1 and shift solenoid valve B connector.
Is there continuity ?
YES - Repair open in the wire between PCM connector terminal A12 and shift solenoid valve B, then go to step 14.
NO - Replace solenoid harness, then go to step 14.
14. Clear the DTC with the HDS.
15. Test-drive the vehicle for several minutes in the D5 position in all five gears.
16. 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.