Diagnostic Trouble Code (DTC) Information PHM-U1A4F96

Condition 

Fig 1: Identifying Phone Module (PHM)

Courtesy of VOLVO CARS CORPORATION

The Phone module (PHM) checks the internal components in the control module.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• An internal fault has occurred.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Ignition switch position I and II.
• Battery voltage between 9 - 16 V.

Substitute Value 

• None.

Possible Source 

• Internal fault in the control module.

Fault symptom[s] 

• Missing or reduced functionality for Volvo On Call
• Missing or reduced functionality in the phone
• Message in information display