Fault-Tracing Information
Fault-tracing
Checking the component
Check the power supply and ground to the Climate control module (CCM) by switching on the ignition and blower fan. The blower fan must blow and it must be possible to regulate the fan speed.
Was a fault detected?
Yes - Checking the voltage and ground terminal
No - Checking CAN cables
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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.
- Switch on the ignition for at least 10 seconds.
Try communicating with the control module by selecting one of the functions for vehicle communication.
Is communication established?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - 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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Attempt New Test - Checking the component
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Checking CAN cables
No Fault Found - Fault-tracing information
DONE - DONE
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Checking the voltage and ground terminal
Check that the fuse for the climate control system in the central electronic module (CEM) is intact.
Check the power supply cable from the Central electronic module (CEM) #C3:74 to the Climate control module (CCM) terminal #C1:1. Check for an open-circuit. Check for loose connections. Check for contact resistance. Check for oxidation.
Check the ground cable between Climate control module (CCM) terminal and the ground terminal. Check for an open-circuit, loose connections, contact resistance and oxidation.
Was a fault detected?
Yes - Verification
No - Checking CAN cables
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