Diagnostic Trouble Code (DTC) Information PHM-B116A15

Condition 

Fig 1: Identifying Handset

Courtesy of VOLVO CARS CORPORATION

The Phone module (PHM) checks the microphone signal from the handset.

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

• Signal voltage is above 4.5 V.

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 

• Only hands-free operates.

Possible Source 

• The cable for the microphone signal, between the handset and the control module, has a short-circuit to supply voltage or open-circuit.

Fault symptom[s] 

• The handset does not function.
• Message in the text display (applies only to phone modules (PHM) with Volvo On Call).