Diagnostic Trouble Code (DTC) Information PHM-B116A11

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:

• The microphone signal is short-circuited to ground.

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

• Ignition position 0, I and II.
• Battery voltage between 9 - 16 V.

Substitute Value 

• Only hands-free operates.

Possible Source 

• Short-circuit to ground in the cable (MIC signal) between the handset and the control module.

Fault symptom[s] 

• Cellular phone/Other party cannot hear/Privacy handset
• Cellular phone/Other party cannot hear/Unsure when/at all times
• Text window and warning symbol/Text message