DTC Troubleshooting: P1780 (49-1)
|DTC P1780:||Problem in Shift Control System|
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.
|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