Faulty Checking Sum

Faulty check sum

Checking components




- Ignition on.
The climate control module (CCM) has diagnosed that two or more damper motor modules (DMM) have the same identity on LIN bus 2.
This may be because one damper motor module (DMM) has been installed incorrectly.
After replacing a damper motor module (DMM), it must be allocated a correct identity by the climate control module (CCM). This is performed during identification of the damper motors on the LIN bus.
If a damper motor module (DMM) is installed that already has an identity allocated to it, this can lead to a conflict on the LIN bus.
Remedy by correctly identifying the damper motor.
Click the VCT2000 symbol to check which damper motor modules (DMM) have the same identity.

Other information:
- Component location Component Location, Climate Control Module (CCM)
- Climate control module (CCM) Service and Repair
- Actuator damper climate control system driver's side Actuator Damper Climate Control System Driver's Side
- Actuator register duct footwell Actuator Register Duct Footwell
- Actuator recirculation Damper Motor Recirculation, Replacing
- Actuator, mixer damper, L.H.D Actuator, Mixer Damper, L.H.D





Continue - ???

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DONE - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
Check that the relevant diagnostic trouble code (DTC) has switched status from permanent to intermittent fault.
Check also that diagnostic trouble code CCM-0070, CCM-0071 or CCM-0072 have not been generated in connection with an identification of damper motors.
These diagnostic trouble codes can only be generated in connection with an identification of damper motors and means that identification has failed for some reason.
Remedy by attempting to identify the damper motors again. Alternatively fault-trace the relevant diagnostic trouble codes (DTCs).





Has the status of the diagnostic trouble code (DTC) changed?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information

Attempt New Test - Checking components

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