Checking The Components And Wiring

Check the communication cable (LIN) with regard to short circuit to ground or supply voltage.

Take readings between:

• Transmission control module (TCM) terminal #A7 and gear selector module (GSM) terminal #2.

If no fault can be found in the cable and the fault remains try replacing the printed circuit board (gear selector module (GSM)).

HINT: The gear selector module (GSM) connector can be accessed by removing the cigarette lighter/electrical outlet. 

Other information 

• see POWER SOCKET 12V (2007) or POWER SOCKET 12V (2008-2012)
• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see PRINTED CIRCUIT BOARD GEAR SELECTOR ASSEMBLY
• see CHECKING WIRING AND TERMINALS

Fig 1: Transmission Control Module Connector Terminal Identification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohms Display

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Top Panel Assembly

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION