Automatic Transmission

DTC P0780: Problem in Shift Control System

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.

1. Warm up the engine to normal operating temperature (the radiator fan comes on).
2. Make sure that the transmission is filled to the proper level, and check for fluid leaks.
3. Drain the ATF through a strainer. Inspect the strainer for metal debris or excessive clutch material.

Does the strainer have metal debris or excessive clutch material?

YES - Replace the transmission, then go to step 13.

NO - Replace the ATF, then go to step 4.

4. Clear the DTC with the HDS.
5. Test-drive the vehicle in D through all five gears.
6. Turn the ignition switch to LOCK (0), and repeat the test-drive in step 5.
7. Monitor the OBD STATUS for P0780 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Intermittent failure, the system is OK at this time.

NO - If the screen indicates FAILED, go to step 8. If the screen indicates NOT COMPLETED, return to step 5 and recheck.

8. Clear the DTC with the HDS.
9. Run the engine until the engine coolant temperature reaches 176 °F (80 °C).
10. Test-drive the vehicle in D through all five gears.
11. Turn the ignition switch to LOCK (0), and repeat the test-drive in step 10.
12. Monitor the OBD STATUS for P0780 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Intermittent failure, the system is OK at this time.

NO - If the screen indicates FAILED, repair shift valve D, or replace the transmission, then go to step 13. If the screen indicates NOT COMPLETED, return to step 1 and recheck.

13. Turn the ignition switch to ON (II).
14. Clear the DTC with the HDS.
15. Test-drive the vehicle in D through all five gears.
16. Turn the ignition switch to LOCK (0), and repeat the test-drive in step 15.
17. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0780 indicated?

YES - Go to step 8.

NO - If Temporary DTC or DTC P0780 is not indicated, or if any other Temporary DTCs are indicated, go to step 15.

18. Monitor the OBD STATUS for P0780 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTC or DTCs were indicated on step 17, go to the indicated DTCs troubleshooting.

NO - If the screen indicates FAILED, then go to step 5. If the screen indicates NOT COMPLETED, go to step 15.