Aisin 81-40LE - Automatic Transmission (European Emissions)

DTC P0785 (European Emissions)

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0785 3-2 Shift Solenoid (SS) Control Circuit

Conditions for Setting the DTC

* The transmission control module (TCM) detects that the ON signal of the timing solenoid (ST) monitor during 0.5 seconds when the timing solenoid driver outputs the OFF signal. The timing solenoid circuit is open or short to battery.
* The TCM detects that the OFF signal of the timing solenoid monitor during 0.1 seconds when the timing solenoid driver outputs the ON signal. The timing solenoid circuit is short to battery.
* The above detection 3 times at shifting continuously.

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
* After failure decision: emergency mode

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.
* The TCM detects the ON signal of the timing solenoid monitor during 100 ms when the timing solenoid driver outputs the ON signal and TCM detects the OFF signal of the timing solenoid monitor during 160 ms when the timing solenoid driver outputs the OFF signal.

Cause of Failure

* Wiring harness or connector between timing solenoid and TCM
* Timing solenoid
* TCM