TEST RESULTS
1
FAN WIRING CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Connect the diagnosis equipment to the climate control system control unit and check whether there are specific errors related to the fan.
Go to Step 2
Errors related to the fan found
Proceed as instructed by the diagnosis equipment
2
Fan electrical wiring connections check. Disconnect/reconnect the fan wiring
Go to Step 3
Fault detected in the fan wiring
Restore the correct wiring of the fan
3
FAN OPERATION CHECK
Check that the fan rotates at all speeds by activating it using the switch.
Go to Step 4
The fan does not work at max. speed
Check the condition of the vehicle fuse and replace it, if necessary.
4
CERAMIC RESISTOR CONDITION CHECK
Check the condition of the ceramic resistor.
Go to Step 5
Ceramic resistor not working correctly
Replace the ceramic resistor
Op. 5040C44 FAN MOTOR ELECTRONIC VARIATOR - R+R
5
CURRENT UPTAKE FAULTS CHECK
Check all the components in the vehicle's electrical system that may cause irregular/excessive current uptake, such as: battery and alternator.
Go to Step 6
Fault found on the component
Replace the component that causes the fault
6
CLIMATE CONTROL SYSTEM CONTROL UNIT OPERATION CHECK
Check that the climate control system control unit is working correctly
End of diagnosis
Climate control system control unit not working properly
Replace the climate control system control unit
Op. 5040D15 CONTROL UNIT WITH KNOBS AND BUTTONS FOR DUAL ZONE AIR CONDITIONER - R.R.