Checking cable

Check the supply voltage to the keypad unit/carphone module by measuring between #C5 and #C2 on the keypad unit/carphone module connector.

Check the supply voltage from the keypad unit/carphone module to the carphone box by measuring between #B5 and #B2 on the keypad unit/carphone module connector. The fault is in the keypad/carphone module unit if the supply voltage to the carphone box is lower.

Other information: 

• To access/replace the carphone box, see Carphone box .
• To access/replace the keypad/carphone module, see Radio/carphone, replacing .
• To connect the breakout box, see Connecting the breakout box, Carphone module .
• For information about signals and connectors, see Signal specification, Keypad unit / carphone module (PHM) .

Fig 1: Identifying Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue when the fault has been remedied. 

• Continue 

  Refer to Verification