Incorrect Data

Incorrect data

Checking components




- Ignition off
- Disconnect connector A for the seat heating module (SHM) right
- Ignition on.
The climate control module (CCM) has detected that a component on LIN bus 2 is transmitting incorrect data and disrupting communication on the LIN bus.
Check the communication by disconnecting the seat heating module (SHM) right.
If other control modules on LIN bus 1 now function, replace the seat heating module (SHM) right.

Was a fault detected?

Yes - Verification

No - Checking components

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Checking components








- Ignition off
- Reconnect connector A for the seat heating module (SHM)
- Ignition on.
Check the components on the climate control unit as follows:
- Disconnect the connectors for the components one at a time
- Check whether the other components regain functionality, for example by activating seat heating
- If the functionality for the other components returns, the fault is probably in the disconnected components.
Remedy as necessary.

Other information:
- For further information about the connectors, fuses and relays, see the Wiring Diagram
- Connecting the breakout box Connecting the Breakout Box, Climate Control Module (CCM)
- Signal description Signal Description, Climate Control Module (CCM)
- Component location Component Location, Climate Control Module (CCM)
- Climate units Service and Repair
- Climate control module (CCM) Service and Repair
- Seat Heating Module (SHM) Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals

Continue - Verification

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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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