Check the condition of the engine cooling fan power supply fuses
Go to Step 2
Faulty engine fan power supply fuses
Replace the faulty fuses (looking for the cause of the malfunction)
2
FAN LEAKAGE CURRENT CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
With the engine running, position the terminal of the ammeter clamp on the fan positive cable and measure the current uptake at max. speed, making sure it is below 20 A
Go to Step 3
Leakage current above 20 A
Replace the engine fan ceramic resistor
3
CURRENT UPTAKE FAULTS CHECK
EVERYTHING OK
PROBLEMS ENCOUNTERED
OPERATION
Check all the components in the vehicle's electrical system that may cause irregular/excessive current uptake, such as: battery and alternator.