Diagnostic Trouble Code (DTC) Information PHM-B10A211

Condition 

Fig 1: Identifying Phone Module (PHM)

Courtesy of VOLVO CARS CORPORATION

The Phone module (PHM) checks the collision signal from the Supplemental restraint system module (SRS).

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

• Signal voltage is below 3.25 V.

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

• Ignition switch position II.
• Engine running.
• Battery voltage between 9 - 16 V.

Substitute Value 

• None.

Possible Source 

• The cable for the collision signal, between the Supplemental restraint system module (SRS) and the Phone module (PHM), has a short-circuit to ground.

Fault symptom[s] 

• Missing or reduced functionality for Volvo On Call
• Message in the text display (applies only to phone modules (PHM) with Volvo On Call).