Diagnostic Trouble Code (DTC) Information ICM-6C7D

Condition

Fig 1: Identifying Accessory USB Unit (AUU)

Courtesy of VOLVO CARS CORPORATION

The serial number for each control module in the infotainment system is stored in the central electronic module (CEM). The stored numbers are compared with the serial numbers of the control modules at start up. If any number does not correspond, that particular control module is blocked and the function is not available. The blocking function for non-approved control modules is designated security on MOST.

The infotainment control module (ICM) checks whether the Accessory USB unit (AUU) is in the approved list stored in the central electronic module (CEM).

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

Accessory USB unit (AUU) is not in the approved list.

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

When the ignition is on for at least 12 seconds and the battery voltage is above 11 V and security on MOST is activated.

Substitute Value

None.

Possible Source

Replacement with an Accessory USB unit (AUU), which is not approved in the list stored in the central electronic module (CEM).
Software was not downloaded upon replacement of the Accessory USB unit (AUU).
Failed or incomplete software download to Accessory USB unit (AUU).

Fault symptom[s]

USB unit/Does not work