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Home >> Volvo >> 2004 >> S40 T-5, Automatic >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Central Electronic Module (CEM) Diagnostic Trouble Codes - 6 Of 10 (544 Body) >> CEM-9A02: Interior Lighting. Signal Too Low (2004-2011) >> Signal Too Low (2007) >> Checking >> Checking Component And Wiring

Checking Component And Wiring

Check the voltage on the front courtesy lighting connector terminal #12 to the output on the central electronic module (CEM). The voltage must be approximately 12 V when the courtesy lighting is deactivated.

Check the control signal cable. Check for an open-circuit. Check for a short-circuit to ground.

Take readings between:

Remedy as necessary.

Other information 

Fig 1: Identifying M2D Control Module (FORTV Executive. Rear Seat Entertainment, Generation 3.1/3.2, Premier TV Receiver) Connector
GLL104056Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 2: Identifying Ohmmeter
GLL101042Courtesy of VOLVO CARS OF NORTH AMERICA.