Diagnostic Trouble Code (DTC) Information TCM-Dd00

Condition 

Fig 1: Identifying Shifter

Courtesy of VOLVO CARS CORPORATION

The transmission control module (TCM) and gear selector module (GSM) communicate with each other in a network via standardized serial communication - local interconnect network (LIN). he control modules transmit and receive information.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• The signal from the Gear selector module (GSM) is incorrect.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Ignition on.

Substitute Value 

• Manual gear shift position (MAN) function is blocked.
• Winter program (W) function is blocked.

Possible Source 

• Interference on the communication lead (LIN) between the gear selector module (GSM) and the transmission control module (TCM).
• Extremely fast intermittent short-circuits or open-circuit on the communication cable (LIN) between the Gear selector module (GSM) and the Transmission control module (TCM).

Fault symptom[s] 

• General warning lamp lit