95 1/2 Model

This Diagnostic Trouble Code (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 low (approx. 9.0 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:
a. Ignition voltage measured between TCM Terminal A7 or A8 and ground C1 is higher than 15.5 volts.
b. The condition needs to be present for at least 1 second.

- Action After The Detection Time:
- Backup Mode.

- Recovery Conditions:
- To recover, Ignition voltage is less than 16 volts.





DTC 26 / Flow Chart