DTC Troubleshooting: P0974 (7-4)

DTC P0974:  Open in Shift Solenoid Valve A Circuit

KE, KG, and KS Models


NOTE:

1.Clear the DTC with the HDS.

2.Start the engine in the P position.

3.Check that DTC P0974 recurs.

Is DTC P0974 indicated?


YES - Go to 7.


NO - Go to 4.


4.Choose Shift Solenoid A in Miscellaneous Test Menu, and test the shift solenoid valve A with the HDS.

5.Start the engine in the P position.

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 P0974.

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 A 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 C6 and A8 or A9.

 

Is there 12-25 W?


YES - Check for loose or poor connections at PCM connector terminal C6. 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. 5 and body ground.

 

Is there 12-25 W?


YES - Repair open in the wire between PCM connector terminal C6 and the shift solenoid harness connector, then go to 13.


NO - Check shift solenoid valve A, and check for an open in the shift solenoid harness in the transmission. Replace shift solenoid valve A and/or shift solenoid harness, then go to 13.


13.Clear the DTC with the HDS.

14.Start the engine in the P position.

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 P0974.

Did the result indicate a pass?


YES - The problem has been corrected.n


NO - Return to 1 and recheck.n