Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The automatic transmission control module (TCM) receives a signal from the pressure switch for lock up PS4 to control the lock-up valve position. Diagnostic trouble code (DTC) TCM-008D is stored if the lock-up solenoid has stuck in the open or closed position, transmitting a faulty signal to the control module.

Substitute value
- TBD

Possible source
- The pressure switch for lock-up is jammed.
- Contact resistance in the terminals.

Fault symptom[s]
- The automatic transmission warning lamp flashes.
- No lock-up function.
- Harsh gear shifting.

Hint: Harsh gear shifting can be caused by:
- No reduction of line pressure when shifting.
- No reduction of line pressure when moving the gear selector between positions P-R, N-R and N-D.
- No torque limiting request to engine control module (ECM) when shifting.