Code 26

This DTC flashes the CHECK TRANS indicator and sets the BACKUP MODE.

CIRCUIT DESCRIPTION:
The ignition voltage of Transmission Control Module (TCM) terminals A7 and A8 is monitored by the TCM and when the voltage is too high (approx. 16 volts) the DTC 26 is stored and the BACKUP MODE is set.

DIAGNOSTIC AIDS:
This Diagnostic is an electrical test done by the TCM.
- Detection conditions:
- Ignition voltage measured between TCM terminal A7 or A8 and ground C1 is higher than 16 volts.
- The condition needs to be present for at least 1 second.
- Action after the detection time: BACKUP MODE
- Recovery conditions: To recover, ignition voltage < 16 volts.