DTC Troubleshooting: P0977 (8-4)

DTC P0977:  Open in Shift Solenoid Valve B Circuit

NOTE:

1.Clear the DTC with the HDS.

2.Test-drive the vehicle for several minutes in 1st, 2nd and 3rd gears in the D position D3 driving mode.

3.Check that DTC P0977 recurs.

Is DTC P0977 indicated?


YES - Go to 7.


NO - Go to 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 D position D3 driving mode.

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 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 4 and recheck.n


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 W?


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.n


NO - Go to 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 W?


YES - Repair open in the wire between PCM connector terminal C4 and the shift solenoid harness connector, then go to 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 13.


13.Clear the DTC with the HDS.

14.Test-drive the vehicle for several minutes in 1st, 2nd and 3rd gears in the D position D3 driving mode.

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.n


NO - Return to 1 and recheck.n