P2770
DTC P2770: Open in Torque Converter Clutch Solenoid Valve CircuitNOTE:
^ 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 through 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 through 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 FAILED?
YES - Go to step 7.
NO - If the tester indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at shift solenoid valve C and the PCM. If the tester indicates NOT COMPLETED, 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, and between terminals B44 and 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 the solenoid harness connector.
12. 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 an open in the wire between PCM connector terminal B44 and the solenoid harness connector, then go to step 15.
13. Remove the solenoid harness connector.
14. Check for continuity between solenoid harness connector terminal No. 3 and torque converter clutch solenoid valve connector terminal.
Is there continuity?
YES - Replace torque converter clutch solenoid valve, then go to step 15.
NO - Replace the solenoid harness, then go to step 15.
15. Clear the DTC with the HDS.
16. 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 through all five gears.
17. Monitor the OBD status for P2770 in the DTCs/Freeze Data in A/T Mode Menu for a pass/fail.
Does the result indicate PASSED?
YES - Troubleshooting is completed.
NO - Return to step 7 and recheck.