Checking contact resistance, oxidation and wiring

Repair or replace the connectors of the audio module (AUM) and antenna amplifier, checking for contact resistance and oxidation:

See Checking wiring and terminals. Intermittent faults

Check the cables between the sub-antenna and control module connector terminal #C2 for open circuit:

See Checking wiring and terminals. Intermittent faults

Remedy as necessary.

Other information: 

• See Radio/telephone, changing
• To access/replace the sub-antenna:

  See Radio equipment, replacing

• See Connecting the breakout box, Audio control module
• For information on signals and connectors:

  See Signal specification, audio control module

Fig 1: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.