TEST RESULTS
1
FAN WIRING CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Place a suitable ammeter clamp on the positive line of the fan wiring and measure fan uptake at max. speed with the engine running, and check that current uptake is below 20 A
Go to Step 2
Current uptake above 20 A
Fan replacement
Op. 5040C30 AIR CONDITIONING FAN - R.R.
2
FAN POWER SUPPLY FUSES CONDITION CHECK
Check the condition of the fan power supply fuses
Go to Step 3
Fuses damaged or not working correctly
Replace the faulty fuses (looking for the cause of the malfunction)
3
SWITCH OPERATION CHECK
Check that the switch is working correctly
Go to Step 4
The switch is not working correctly
Replace the switch
Op. 5040D23 KNOB (ONE) FOR ANY OF THE AIR CONDITIONING CONTROLS - R.R.
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.
End of diagnosis
Fault found on the component
Replace the component that causes the fault