T10 Passenger compartment wind noise, lower area (underbody)

Make: Alfa Romeo
Model: 156 Factory Service Manual
Year: 1997–2002
Section: Wind noise › T10 Passenger compartment wind noise, lower area (underbody)

Fault diagnosisT10 Passenger compartment wind noise, lower area (underbody)

With the vehicle moving, there is a noise coming from the lower part of the passenger compartment.

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Check that the noise is actually coming from the underbody by carrying out the preliminary check for locating noises See Test 70A Rustle detection (preliminary detection)	OK	Move onto step 1
0		The wind noise comes from another area	Check the diagnostic table corresponding to the area located. End of diagnosis
1	UNDER ENGINE PARTITION CHECK Check the condition of the bulkhead under the engine and make sure that it is correctly fitted	OK	Move onto step 2
		Partition damaged	Replace the partition End of diagnosis
		Partition incorrectly fixed	Renew the fixing of the partition End of diagnosis
2	UNDERFLOOR CHECK Check the lining under the floor pan, particularly: the plugs are fitted the plugs are correctly fitted the seals are efficient	OK	Move onto step 3
2		Faults in the underfloor cover	Renew the plugs and seals for the underfloor cover End of diagnosis
3	CHECK CORRECT OPERATION	OK	Check that the fault is no longer presentEnd of diagnosis
3	CHECK CORRECT OPERATION	Fault persists	Incorrect selection of diagnostic procedure

Parts & tools for this job For 1997 Alfa Romeo 156

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