Checking wiring and component

HINT: The hands-free loudspeaker is connected to the carphone module via a connector under the driver's seat. 

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.

  Check the cable between the carphone module connector A4 (terminal #4) and the hands-free loudspeaker connector B10. Check the cable between the carphone module connector A5 (terminal #5) and the hands-free loudspeaker connector B9. Check these cables for a short-circuit to ground according to Short-circuit to ground, intermittent faults .

  Try replacing the hands-free loudspeaker if no fault is found in the wiring.

  Remedy as necessary.

  Other information: 

  • To access or replace the hands-free unit, see Handsfree equipment, replacing
  • To access or replace the carphone module, see Telephone module/-control module (PHM), changing
  • To connect the breakout box, see Connecting the breakout box. Carphone module
  • For information about signals and connectors, see Signal description. Phone module (PHM) .
  Fig 2: Identifying Hands-Free Speaker Connector (B) Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Connector (F) Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Information