Diagnostic Trouble Code (DTC) Information CEM-De01

Condition

Fig 1: Identifying Central Electronic Module (CEM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

The central electronic module (CEM) checks the communication with the brake control module (BCM).

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that communication with the brake control module (BCM) is not operating.

The diagnostic trouble code (DTC) can be diagnoses with the ignition on for at least 10 seconds and battery voltage greater than 8 volts.

NOTE: In the event of CEM-DEXX diagnostic trouble codes (DTCs) being stored, the central electronic module (CEM) must not be replaced; the diagnostic trouble code (DTC) indicates a communication fault in the CAN network

Substitute Value

No ABS function.

Possible Source

No power supply to the brake control module (BCM)
Contact resistance in the terminals
Open-circuit in the wiring for the CAN high speed network to the brake control module (BCM)
The brake control module (BCM) is not intended for this vehicle, for example used control module with other software/hardware.

Fault symptom[s]

The starter motor does not operate.
The engine does not start.
The ABS warning lamp is lit
No ABS function
Message in the display.