Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CCM-E003

Condition




The control module compares its configuration ID with the signal configuration transmitted on the control area network (CAN) by the central electronic module (CEM). If the configuration IDs do not correspond the fault code is stored. The diagnostic trouble code (DTC) is also stored if the communication between the control module and the central electronic module (CEM) is interrupted.

Note! In the event of open-circuit in both the control area network (CAN) cables, 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. When the diagnostic trouble code (DTC) is stored, the control module responds to the diagnostic command, however normal control area network (CAN) communication does not work. ("Expulsion mode")

Substitute value
- Limp home function.

Possible source
- Faulty control area network (CAN) configuration ID. (The node is not intended for this car (for example a used control module with different software/hardware)).

Note! In the event of open-circuit in both the control area network (CAN) cables, 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. Diagnostic information can be read off if there is an open-circuit in only one of the cables. The functionality of the control module may also remain, but with a possible reduction in performance.

Note! The control module responds to diagnostic data, however the CAN communication does not function.

Note! In the event of missing CAN communication, but with the power supply still on, the climate control module (CCM) will function for a few minutes after the key has been removed (Limp-home function).

Hint: If the diagnostic trouble code (DTC) has also been stored for an open-circuit in the communication with other control modules on the control area network (CAN), the fault may be a common one (for example an open-circuit in one of the control area network (CAN) cables). To localize faults, refer to the applicable wiring diagram.

Fault symptom[s]
- The climate control system functions after the key has been removed
- The lower row of buttons on the climate control system does not function
- No cooling from the air conditioning (A/C) system
- Misting on the windows and/or door mirrors
- Does not deadlock
- Does not open from deadlock
- Private locking of the trunk lid does not function. (S80, S60)
- Temporary disengagement of the detectors is not possible.