Diagnostic Trouble Code (DTC) Information CEM-De11

Condition

Fig 1: Identifying Engine Control Module (ECM)

Courtesy of VOLVO CARS OF NORTH AMERICA.

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

NOTE: The diagnostic trouble code (DTC) indicates a fault in the communication across the CAN network and does not isolate an individual node. Do not replace the central electronic module (CEM) unless fault-tracing in VIDA isolates the central electronic module (CEM) as not functioning.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value

None.

Possible Source

No power supply to the engine control module (ECM)
Open-circuit in the ground lead to the engine control module (ECM)
Contact resistance in the terminals
Open-circuit in the wiring for the CAN high speed network to the engine control module (ECM)
The engine control module (ECM) is not intended for this car (for example a used control module with different software/hardware).

HINT: If several diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM) for communication faults with other control modules in the high speed network, this indicates a common fault in the Control area network, see the wiring diagram.

Fault symptom[s]

Starting/Engine does not start/Engine does not turn/No clicking sound at start attempt
Starting/Engine does not start/Unsure when/at all times
The engine cuts out
Engine feels sluggish
Malfunction indicator lamp (MIL) lit
Message in the display.