| DTC P1780: | Problem in Shift Control System |
| 1. | Clear the DTC with the HDS. |
| 2. | Test-drive the vehicle for several minutes in the D position through all five gears, then slow down to a stop. |
| 3. | Retest-drive the vehicle for several minutes in the D position through all five gears, then slow down to a stop. |
| 4. | Check for other DTCs indicated simultaneous with the code P1780. NOTE: DTC P1780 means there is one or more A/T DTCs about the shift control system. Are there other DTCs? YES - Troubleshoot a problem as indicated by the DTC.n NO - 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.n |