Intermittent fault

Check the control module and TMC/FM receiver connectors for contact resistance and oxidation according to Contact resistance and oxidation .

Check signal cable between the control module #B7 and TMC/FM receiver terminal 2 for an intermittent open-circuit according to Open-circuit, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check signal cable between the control module #B16 and TMC/FM receiver terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults and an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults , and an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Remedy as necessary.

Other information:

To access/replace the control module, see Replacing the control module, old system .
To access/replace the TMC receiver, see Replacing TMC receiver .
To access/replace the FM receiver, see Replacing the FM receiver .
To connect the breakout box, see Connecting the breakout box .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.