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 the 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 6.

10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect PCM connectors B (44P) and C (44P).
13. Measure resistance between PCM connector terminals B44 and C40.





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

14. Disconnect the solenoid harness connector.
15. Check for continuity between PCM connector terminal B44 and solenoid harness connector terminal No. 3.





Is there continuity?
YES - Go to step 13.
NO - Repair open in the wire between PCM connector terminal B44 and the solenoid harness connector, then go to step 15.

16. Remove the solenoid harness connector.
17. Check for continuity between solenoid harness connector terminal No. 3 and the torque converter clutch solenoid valve connector terminal.





Is there continuity?
YES - Replace the torque converter clutch solenoid valve, then go to step 18.
NO - Replace the solenoid harness, then go to step 18.

18. Reconnect all connectors.
19. Turn the ignition switch ON (II).
20. Clear the DTC with the HDS.
21. Start the engine, and warm it to normal operating temperature (the radiator fan comes on).
22. Test-drive the vehicle for several minutes in the D position through all five gears.
23. Check for DTCs 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, then go to step 1.
NO - Go to step 24.

24. Monitor the OBD STATUS for P2770 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES - Troubleshooting is complete. If any other DTCs were indicated in step 25, 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.

25. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
26. Start the engine, and warm it to normal operating temperature (the radiator fan comes on).
27. Test-drive the vehicle for several minutes in the D position through all five gears.
28. Check for DTCs 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 26. If the PCM was substituted, go to step 1.
NO - Go to step 29.

29. 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 28, 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 26. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 26.