Contents

		TEST RESULTS
1	FAN OPERATION CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	With the engine on and engine temperature approximately 90°, or as an alternative, activating the compressor (A/C version), check fan activation, and verify the fault	End of diagnosis	Noise upon activation of the fan	Go to Step 2
2	FOREIGN BODIES CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	Check for foreign bodies next to the fan that cause noise	Go to Step 3	Foreign bodies identified next to the fan	Remove the foreign bodies causing the noise
3	COOLING MODULE FASTENING CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	Check for the presence of looseness on the fastenings/screws of the duct on the cooling module	Go to Step 4	Looseness on the fastenings of the cooling module	Restore the fastenings of the duct on the cooling module
4	COOLING MODULE INTERFERENCE CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	Check whether the fan impeller is still noisy after the previous interventions	Go to Step 5	The impeller is still noisy	Replace the impeller assembly Op. 1088B26 AIR DUCT ON RADIANT MASS - R.R.
5	NOISE/VIBRATIONS CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	Disconnect the fan connector and check whether the noise/vibration disappears.	End of diagnosis	The noise persists	Go to Step 6
6	NOISE/VIBRATIONS CHECK	EVERYTHING OK	PROBLEMS ENCOUNTERED	OPERATION
	Check water pump noise with the engine fan disconnected.	End of diagnosis	Water pump noise	Replace the water pump Op. 1088C10 WATER PUMP - R.R.