Diagnostic Trouble Code (DTC) Information TCM-Dd02

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 is stored if the control module detects:

Faults in the information during communication between the control module and the Gear selector module (GSM).

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
Gear selector indicator does not function