P1781

DTC P1781









Conditions for Setting the DTC
- Transmission control module (TCM) detects that malfunction of engine speed signal for 2 seconds
- No DTC U2105
- Engine Misfire Detected

Action Taken When the DTC Sets
- TCM will request the illumination of the malfunction indicator lamp (MIL) and store the DTC when the TCM detects a failure on the 1st ignition cycle
- No engine torque reduction control
- No lock-up
- No engagement pressure control
- No 4th gear
- No self-learning control
- No timing solenoid control for N-D
- TCM judges the engine revolution is 0 RPM

Conditions for Clearing the DTC
- The TCM turns OFF the MIL when no further failures are detected on the next ignition cycles.
- The scan tool can clear the DTC from the TCM history.
- The TCM clears the DTC from the TCM history memory after 40 consecutive ignition cycles without fault.

Cause of Failure
- Wiring harness or connector between engine control module (ECM) and TCM
- ECM
- TCM