Checking The Power Supply And Ground For The Phone Module (PHM)

Check the fuse in the engine compartment fusebox for the infotainment system (F16).

Check the fuse for the phone module (PHM) in the central electronic module (CEM).

Check the phone module (PHM) connector. Check for contact resistance and oxidation. Also check the connector. Check for damage.

Check the power supply cable between the fuse and the phone module (PHM). Check for an open-circuit.

Check the ground lead between the control module and the ground terminal. Check for an open-circuit. Also check the ground terminal. Check for contact resistance and oxidation.

The phone module (PHM) is powered via an internal relay in the central electronic module (CEM). To check the status of the relay, switch on the ignition and click on the VCT2000 symbol.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL DESCRIPTION CENTRAL ELECTRONIC MODULE (CEM)
• see PHONE MODULE (PHM)
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA (Volvo Scan Tool)

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Control Module

Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  Refer to VERIFICATION 

• NO 

  Refer to SIGNAL MISSING