Diagnostic Trouble Code (DTC) Information CEM-De30
Condition
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that communication with the electric power steering module (EPS) is not operating.
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 Control area network
The diagnostic trouble code (DTC) can be diagnosed when the ignition has been on for at least 10 seconds.
Substitute Value
- None.
Possible Source
- No power supply to the electrical power steering module (EPS)
- Open-circuit in the ground lead to the electric power steering module (EPS)
- Contact resistance in the terminals
- Open-circuit in the wiring for the CAN high speed network to the electric power steering module (EPS)
- The electric power steering module (EPS) 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]
- The power steering system does not operate.