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Checking Components And Wiring

Fig 1: Identifying Ignition OFF

GLL101045

Courtesy of VOLVO CARS CORPORATION

Ignition off
Disconnect connector A for the phone module (PHM).
Disconnect the handset's connector.
Check the microphone signal's cable on the control module's connector A for short-circuit to voltage.

Check between:
- #19 (#19) and #7 (#7).
- #19 (#19) and #5 (#5).
Check the microphone signal's cable for open circuit.

Measure between the control module's connector A #19 (#19) and the handset's connector #1 (#21).

Check the connectors for loose connections, damaged or bent pins as well as oxidation.

If no malfunction was found on the cable, try replacing the handset or holder.

Remedy as necessary.

Other information:
- see CONNECTING THE BREAKOUT BOX
- see SIGNAL SPECIFICATION
- see LOCATION OF COMPONENTS
- see PHONE MODULE (PHM), REPLACING
- see HANDSET, REPLACING
- see CHECKING WIRING AND TERMINALS
Fig 2: Identifying Connector (F) Terminals
Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Ohm Meter
Courtesy of VOLVO CARS CORPORATION

Continue
See: VERIFICATION