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Home >> Volvo >> 2008 >> S40 T-5, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Central Electronic Module (CEM) Diagnostic Trouble Codes - 7 Of 10 (544 Body) >> CEM-Dd11: Communication With SCU Control Module. Signal Missing (2006-2011) >> Signal Missing (2008-2011) >> Checking The Wiring

Checking The Wiring

Fig 1: Identifying Ignition In Off Position
GLL101046Courtesy of VOLVO CARS OF NORTH AMERICA.

Check the fuse for the ignition switch in the engine compartment fusebox.

If the fuse is blown, check the circuit after the fuse before replacing the fuse. Check for a short-circuit to ground.

Disconnect connector A on the central electronic module (CEM). Connect the breakout box.

Insert the key in the ignition switch.

Measure the voltage between #A15 (#15) and ground.

The voltage must be 12 V.

Check the cable between terminals #3 and #6 on the start control module (SCU). Check for an open-circuit.

Check the signal cable between central electronic module (CEM) terminal #B17 (#17) and start control module (SCU) terminal #2. Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

Check the cable between start control module (SCU) terminal #A1 and ground. Check for an open-circuit. Also check the ground terminal for oxidation.

Remedy the cables as necessary.

Other information 

Fig 2: Identifying 8-Pin Connector
GLL140621Courtesy of VOLVO CARS OF NORTH AMERICA.
Fig 3: Identifying Damper Motor Module (DMM) Connector Terminals
GLL139872Courtesy of VOLVO CARS OF NORTH AMERICA.

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