Diagnostic Trouble Code (DTC) Information CEM-B102481

Condition

Central electronic module (CEM) checks communication with antenna unit ignition (IAU).

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

The serial communication from antenna unit ignition (IAU) is incorrect.

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

Communication with antenna unit ignition (IAU).

NOTE:

The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Fig 1: Identifying Central Electronic Module (CEM)

Courtesy of VOLVO CARS CORPORATION

Possible Source

Incorrect communication from antenna unit ignition (IAU).

Fault symptom[s]

Starting/Engine does not start/Engine does not turn/No clicking sound at start attempt
Starting/Engine does not start/Engine does not turn/Clicking sound at start attempt
Starting/Engine does not start/Engine does not turn/Unsure when/at all times
Starting/Engine does not start/Unsure when/at all times
Text window and warning symbol/Text message