Diagnostic trouble code (DTC) information CEM-E000
Condition
The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network). The diagnostic trouble code (DTC) is stored if the control module registers serious interference on the high speed network (CAN communication blocked).
In the event of system communication problems, it is not possible to communicate with the control module. Therefore it will only be possible to read off the diagnostic trouble code (DTC) if this type of fault is intermittent.
The diagnostic trouble code (DTC) can be diagnosed when the HS CAN is active.
Substitute Value
- The control module shuts itself off ("bus-off").
HINT: The control module will remain shut off until the power supply is broken (15, 30, X). When the power supply is connected the control module will make a new attempt to communicate.
Possible Source
- Short-circuit between the control area network (CAN) wiring
- Open-circuit in one of the control area network (CAN) cables
- Internal fault in another control module in the same part of the control area network (CAN)
- Internal fault in the control module.
Fault symptom[s]
- The starter motor turns but the engine does not start.
- The speedometer does not operate.
- Tachometer not working.
- Engine coolant temperature (ECT) gauge does not function.
- Cruise control does not function at all.
- Jerky operation.