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 relevant section in the Wiring Diagram
- Connecting the breakout box Connecting The Breakout Box, Climate Control Module (CCM)
- Signal specification Signal Description, Climate Control Module (CCM)
- Location of components 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 - Identifying the Damper Motor Module (DMM)

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Identifying the Damper Motor Module (DMM)

Information
- The control module must be identified after replacing the Damper Motor Module (DMM).

Note! Identification must only be carried out when replacing the Damper Motor Module (DMM).

Have any damper motors been replaced?

Yes - Identifying the Damper Motor Module (DMM)

No - Verification

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Identifying the Damper Motor Module (DMM)

Hint: Identification of damper motors requires that the relevant damper motor is run to the limit positions. These runs can take up to 30 seconds. It is important that a battery charger is connected when identifying the damper motors.

- Ignition off
- Reinstall the connectors, components etc.

Note! Climate Control Module (CCM) and damper motors can be affected by the temperature. The vehicle should have normal room temperature when performing this service.

Carry out identification as follows:
- Ignition on.
- Click on the VCT2000 symbol. Wait until identification has been carried out.
- Ignition off.

Hint: If identification cannot be carried out, this may be because one of the damper motors is damaged. To check for a damaged damper motor, check that the actual/preset range is correct. You can also check whether a control module/sensor is damaged or incorrectly installed by reading off the detected/expected control module/sensor.

Continue - Calibrating the Climate Control Module (CCM)

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Calibrating the Climate Control Module (CCM)

Caution! When activating this function, calibration of the Climate Control Module (CCM) starts. After carrying out calibration read off of the diagnostic trouble codes (DTCs) starts. To ensure that diagnostics for the Climate Control Module (CCM) have been carried out, delay for 30 seconds before reading out diagnostic trouble codes (DTCs) after calibration.

Note! Climate Control Module (CCM) and damper motors can be affected by the temperature. The vehicle should have normal room temperature when performing this service.

Carry out calibration as follows:
- Ignition on.
- Click on the VCT2000 symbol. Wait until calibration has been carried out and diagnostic trouble codes (DTCs) read out.
- Ignition off.
This function controls the components that communicate with the Climate Control Module (CCM) via LIN bus 1 and LIN bus 2. In the event of a fault in any of the LIN buses, diagnostic trouble codes (DTCs) CCM-0070 to CCM-0071 will be stored depending on the fault. These diagnostic trouble codes (DTCs) can only be stored in conjunction with this diagnostic function.
If any of these diagnostic trouble codes (DTCs) recur, recalibrate to check if the problem was overcome. If the diagnostic trouble code (DTC) recurs, fault-trace the relevant diagnostic trouble code (DTC).

Continue - Verification

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Identifying the Damper Motor Module (DMM)

Information
- The control module must be identified after replacing the Damper Motor Module (DMM).

Note! Identification must only be carried out when replacing the Damper Motor Module (DMM).

Have any damper motors been replaced?

Yes - Identifying the Damper Motor Module (DMM)

No - Verification

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Identifying the Damper Motor Module (DMM)

Hint: Identification of damper motors requires that the relevant damper motor is run to the limit positions. These runs can take up to 30 seconds. It is important that a battery charger is connected when identifying the damper motors.

Continue - Verification

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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 - Troubleshooting procedure complete

No - Fault-tracing information

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Fault-tracing information

Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - Exit Fault-Tracing

No - Attempt New Test

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