Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The transmission control module (TCM) and the gear selector module (GSM) communicate with each other over a network via a standardised serial communication protocol, Local Interconnect Network (LIN), to exchange information. The control modules both send and receive information.
If the transmission control module (TCM) registers that the signal from the gear selector module (GSM) is missing, the diagnostic trouble code (DTC) is generated.
The diagnostic trouble code can be diagnosed when the ignition is on.

Substitute value
- Manual gearchange "Man" function block.
- The function Sport program S is blocked.

Possible source
- Contact resistance or oxidation on connections
- Open circuit on the communication lead (LIN) between the gear selector module (GSM) and the transmission control module (TCM).
- Open circuit on the lead for the power supply or the ground lead to the gear selector module (GSM).
- Internal fault in gear selector module (GSM).

Fault symptom[s]
- General warning lamp lit
- Gear selector indicator not working.