Diagnostic Trouble Code (DTC) Information ICM-1A57

Condition 

Fig 1: Identifying Infotainment Control Module (ICM)

Courtesy of VOLVO CARS CORPORATION

The infotainment control module (ICM) checks the communication with the phone module (PHM).

The diagnostic trouble code (DTC) is stored if the infotainment control module (ICM) registers a fault in the communication with the phone module (PHM).

The diagnostic trouble code (DTC) can be diagnosed with the ignition on and the battery voltage above 11 V.

Substitute Value 

• None.

Possible Source 

• Internal fault in the phone module (PHM)
• No phone module (PHM).

Fault symptom[s] 

• The carphone is not working.