Automatic Transmission

DTC P0780: Shift Control System

NOTE:
^ Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
^ This code is stored whenever DTCs P1730, P1731, P1732, P1733, P1734 are detected.

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.
4. Turn the ignition switch to LOCK (0), and repeat the test-drive in step 3.
5. Check for other DTCs indicated simultaneously with DTC P0780:

NOTE: DTC P0780 means there is one or more A/T DTCs regarding the shift control system.

Are there other DTCs?

YES - Go to the indicated DTC's troubleshooting.
^ P1730
^ P1731
^ P1732
^ P1733
^ P1734

NO - Go to step 6.

6. Update the PCM if it does not have the latest software, or substitute a known-good PCM.
7. Test-drive the vehicle with the shift lever in D, and let the transmission shift through all five gears.
8. Turn the ignition switch to LOCK (0), and repeat the test-drive in step 7.
9. Check for DTCs with the HDS.

Is DTC P0780 indicated?

YES - If the PCM was updated, substitute a known-good PCM, then go to step 7. If the PCM was substituted, go to step 1.

NO - Go to step 10.

10. Monitor the OBD STATUS for P0780 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 9, go to the indicated DTC's troubleshooting.

NO - If the PCM was updated and the screen indicates FAILED, substitute a known-good PCM, then go to step 1. If the PCM was substituted, go to step 1. If the screen indicates NOT COMPLETED, go to step 7.