Checking Components And Wiring

Check the signal cable for the microphone between phone module (PHM) connector B terminal #14 (#56) and handset connector terminal #2 (#22). Check for a short-circuit to supply voltage.

Check the signal cable for the microphone between phone module (PHM) connector B terminal #14 (#56) and handset connector terminal #2 (#22). Check for an open-circuit.

Check the connectors for loose connections, damaged or bent terminal pins and oxidation.

Try replacing the carphone handset if no fault is found in the wiring.

Remedy as necessary.

Other information: 

• To connect the breakout box, see CONNECTING THE BREAKOUT BOX
• For information about signals and connectors, see SIGNAL SPECIFICATION
• To access or replace the control module, see PHONE MODULE (PHM), REPLACING
• To access or replace the handset, see HANDSET, REPLACING
• see CONTENTS .

Fig 1: 10 CD Changer Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 3: Breakout Box

Courtesy of VOLVO CARS CORPORATION

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  Refer to VERIFICATION