Checking the Components And Wiring

HINT: Check that no diagnostic trouble codes (DTCs) have been stored in the accessory electronic module (AEM) or in the MOST network before carrying out this fault-tracing. 

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Disconnect the connectors for the handsfree box and accessory electronic module (AEM).

  Check that the telephone connections on the phone and in the holder are clean. Check that the connector guards are in not place.

  Check the connectors. Check for loose connections. Check for contact resistance and oxidation. Check the female and male sections of the connectors. The terminals must not be damaged or pressed in.

  Check the cable between the phone and handsfree box. Check for an open-circuit.

  Check the cable between the handsfree box and the accessory electronic module (AEM). Check for an open-circuit.

  Other information 

  • See Signal Specification
  • See Checking Wiring And Terminals
  Fig 2: Accessory Electronic Module Ground Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Handsfree Box Connector

  Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification