DTC Troubleshooting

DTC P2770: Open in Torque Converter Clutch Solenoid Valve Circuit

NOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
^ This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
4. Test-drive the vehicle for several minutes in the D position through all five gears.
5. Check for DTCs with the HDS.
Is DTC P2770 indicated?
YES - Go to step 10.
NO - Go to step 6.

6. Choose Lockup Solenoid Test in Miscellaneous Test Menu, and test the torque converter clutch solenoid valve with the HDS.
Is a clicking sound heard?
YES - Go to step 7.
NO - Go to step 10.

7. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on).
8. Test-drive the vehicle for several minutes in the D position through all five gears.
9. Monitor the OBD STATUS for P2770 in the DTCs MENU with HDS.
Does the screen indicate FAILED?
YES - Go to step 10.
NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the torque converter clutch solenoid valve and the PCM. If the screen indicates NOT COMPLETED, go to step 8.

10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connectors B (24P), C (22P), and (31 P).
13. Measure resistance between PCM connector terminals C6 and E3.





Is there 12-25 ohms?
YES - Go to step 24.
NO - Go to step 14.

14. Disconnect the torque converter clutch solenoid valve connector.
15. Measure torque converter clutch solenoid valve resistance at the solenoid valve connector.





Is there 12-25 ohms?
YES - Go to step 16.
NO - Replace the torque converter clutch solenoid valve, then go to step 17.

16. Check for continuity between torque converter clutch solenoid valve connector terminal No. 1 and body ground.





Is there continuity?
YES - Repair open in the wire between PCM connector terminal C6 and the torque converter clutch solenoid valve, then go to step 17.
NO - Repair open in the wire between the torque converter clutch solenoid valve and ground (G151), or repair poor ground (G151), then go to step 17.

17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Clear the DTC with the HDS.
20. Start the engine, and warm it to normal operating temperature (the radiator fan comes on).
21. Test-drive the vehicle for several minutes in the D position through all five gears.
22. Check for DTC with the HDS.
Is DTCs P2770 indicated?
YES - Check for poor connections or loose terminals between the torque converter clutch solenoid valve and the PCM, then go to step 1.
NO - Go to step 23.

23. Monitor the OBD STATUS for P2770 in the DTCs MENU with HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated in step 22, go to the indicated DTC's troubleshooting.
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the torque converter clutch solenoid valve and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, go to step 21.

24. Update the PCM if it does not have the latest software, or substitute a known good PCM.
25. Start the engine, and warm it to normal operating temperature (the radiator fan comes on).
26. Test-drive the vehicle for several minutes in the D position through all five gears.
27. Check for DTC with the HDS.
Is DTC P2770 indicated?
YES - Check for poor connections or loose terminals between the torque converter clutch solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 25. If the PCM was substituted, go to step 1.
NO - Go to step 28.

28. Monitor the OBD STATUS for P2770 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other DTCs were indicated in step 27, go to the indicated DTC's troubleshooting,
NO - If the screen indicates FAILED, check for poor connections or loose terminals between the torque converter clutch solenoid valve and the PCM. If the PCM was updated, substitute a known-good PCM, then go to step 25. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 26.