P2770

DTC P2770: Open in Torque Converter Clutch Solenoid Valve Circuit

NOTE:
^ Record all freeze data and review 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. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Test-drive the vehicle for several minutes in the D position in all five gears.
3. Check that DTC P2770 recurs.
Is DTC P2770 indicated?
YES-Go to step 7.
NO-Go to step 4.
4. Choose Lockup Solenoid Test in Miscellaneous Test Menu, and test the torque converter clutch solenoid valve with the HDS.
Is the system normal?
YES-Go to step 5.
NO-Go to step 7.
5. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Test-drive the vehicle for several minutes in the D position in all five gears.
6. Monitor the OBD status for P2770 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a fail?
YES-Go to step 7.
NO-Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at shift solenoid valve C and PCM. 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 B44 and B43 or C40.
Is there 12 - 25 Ohms?
YES-Check for loose or poor connections at PCM connector terminal B44. 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.
NO-Go to step 11.
11. Disconnect torque converter clutch solenoid valve connector.





12. Measure torque converter clutch solenoid valve resistance at the solenoid valve connector.
Is there 12 - 25 Ohms?
YES-Go to step 13.
NO-Replace torque converter clutch solenoid valve, then go to step 14.





13. 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 B44 and torque converter clutch solenoid valve, then go to step 14.
NO-Repair open in the wire between shift solenoid valve B and ground (G151), or repair poor ground (G151), then go to step 14.
14. Clear the DTC with the HDS.
15. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on). Test-drive the vehicle for several minutes in the D position in all five gears.
16. Monitor the OBD status for P2770 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate a pass?
YES-The problem has been corrected.
NO-Return to step 1 and recheck.