P0977

DTC P0977: Open in Shift Solenoid Valve B Circuit

NOTE:
^ Record all freeze data and review the 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 D 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. 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 the D position in all five gears.
6. Check the OBD status in DTC Monitor Tool from DTCs/Freeze Data in A/T Mode 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. 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 B (44P) and C (44P).





10. Measure the resistance between PCM connector terminals C23 and B43 or C40.
Terminal side of female terminals
Is there 12-25 Ohms?
YES-Check for loose or poor connections at PCM connector terminal C23, 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 13.





12. Check for continuity between shift solenoid valve B connector terminal No. 1 and body ground.
Wire side of female terminals
Is there continuity?
YES-Repair open in the wire between PCM connector terminal C23 and shift solenoid valve B, then go to step 13.
NO-Repair open in the wire between shift solenoid valve B and ground (G151), or repair poor ground (G151), then go to step 13.
13. Clear the DTC with the HDS.
14. Test-drive the vehicle for several minutes in the D position in all five gears.
15. Check the OBD status in DTC Monitor Tool from DTCs/Freeze Data in A/T Mode 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.