Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The speed signal comes from a sensor on the transmission. The transmission control module (TCM) uses the signal to select the correct gear. The control module also uses the engine speed sensor (RPM) signal to determine the speed. Diagnostic trouble code (DTC) TCM-0083 is stored if the control module registers that the speed signal is incorrect.

Substitute value
- TBD

Possible source
- Contact resistance in the terminals.
- Signal cable (+) or signal cable (-) short-circuited to ground, to supply voltage or to each other.
- Defective transmission speed sensor.

Fault symptom[s]
- General orange warning lamp lit.
- 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.