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 transmission control module (TCM) also uses the transmission speed sensor signal to determine vehicle speed. Diagnostic trouble code (DTC) TCM-0083 is stored if the transmission control module (TCM) registers that the vehicle speed signal is incorrect.

Substitute value
- The control module (TCM) "Emergency mode II" program is initiated.

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

Fault symptom[s]
- General orange warning lamp lit.
- No lock-up function.
- Harsh gear shifting.

Hint: Harsh gear shifting can be caused by:
- No adaptation of the gear slippage times at high altitude (High Altitude Compensation).
- 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.