Checking components and connectors
- Ignition off
- Disconnect the climate control module (CCM).
Check that the fan rotates freely and is not blocked by any objects.
Check the fan connector. Check for contact resistance and oxidation.
NOTE:From and including w50 2001, the fan is connected directly to connector C with no wiring in-between.
Try replacing the fan if no other fault is found.
Remedy as necessary.
Other information:
- To access and replace the control module, see Dashboard environment panel (including climate control module (CCM)), replacing
- To access or replace the blower fan motor, see Blower fan motor passenger compartment temperature sensor, replacing
- For other values, see Signal specification
- See Checking wiring and terminals .
- Continue
Refer to Verification