P0480 Cooling fans control 1

			Test results
1	COMPONENT CONCERNED	ELECTRICAL CONNECTION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Fan 1 wiring	Check for the presence of short circuit to Vbatt	Go to Step 2	Presence of short circuit to Vbatt.	Restore correct insulation to battery positive
2	COMPONENT CONCERNED	ELECTRICAL CONNECTION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Fan 1 wiring	Check for short circuits to earth	Go to Step 3	Presence of short circuit to earth	Restore correct insulation to earth
3	COMPONENT CONCERNED	ELECTRICAL CONNECTION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Fan 1 wiring	Check for an open circuit	Go to Step 4	Presence of open circuit	Restore the correct connections
4	COMPONENT CONCERNED	COOLING FAN RELAY SUPPLY CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Cooling fan relay	Check that the cooling fan relay is receiving the correct power supply	Go to Step 5	Cooling fan relay supply not correct	Restore the correct cooling fan relay supply
5	COMPONENT CONCERNED	COOLING FAN RELAY OPERATION CHECK	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
	Cooling fan relay	Check that the cooling fan relay is working correctly See E5020 ENGINE COOLING	End of diagnosis	Cooling fan relay not working correctly	Replace the cooling fan relay