Checking Signal Cable

Check the signal cable between the central electronic module (CEM) and the immobilizer antenna unit.

Diagnostic trouble code (DTC) CEM-6C42: 

The cable between the central electronic module (CEM) terminal #14D and the immobilizer antenna unit terminal #2.

Diagnostic trouble code (DTC) CEM-6C44: 

The cable between the central electronic module (CEM) terminal #13D and the immobilizer antenna unit terminal #3.

Check the signal cable. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit. Check for contact resistance and oxidation.

Remedy as necessary.

Other information: 

• To access the central electronic module (CEM) connector, see Central electronic module (CEM), replacing
• To access the immobilizer antenna unit/connector, see Antenna unit immobilizer, replacing
• To connect the breakout box, see Connecting the breakout box
• For information about signals, see Signal specification
• See Checking wiring and terminals .

Fig 2: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Ignition Switch Bulb

Courtesy of VOLVO CARS OF NORTH AMERICA.

Refer to Information