22 · Diagnostics

Excessive rolling/pitching - at rear

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Steering – vehicle behaviour › Excessive rolling/pitching - at rear

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Fault diagnosisExcessive rolling/pitching - at rear

EXCESSIVE ROLLING/PITCHING - AT REAR

The customer complains of an excessive rolling and/or pitching sensation of the vehicle, especially at the back.

1	ROAD TEST TO EVALUATE THE ROLLING/PITCHING	All OK	Problems encountered	Operation
	Carry out a road test to evalute the folling/pitching of the vehicle See Test 44B ROAD TEST FOR ROLLING/PITCHING EVALUATION	End of diagnosis	Subjective judgement compared with the reference vehicle 6	Acceptable behaviour of the vehicle
			Subjective judgement compared with the reference vehicle 5.5	Move on to Step 2
			Subjective judgement compared with the reference vehicle 3-4	Move on to Step 4
2	END OF TRAVEL BUFFER CHECK	All OK	Problems encountered	Operation
	Check that the end of travel buffer for the rear spring is not faulty carrying out See Test 4420AA CHECK ON REAR SUSPENSION SPRING END OF TRAVEL BUFFER	Move on to Step 3	End of travel buffer deteriorated	Replace the end of travel buffer Op. 4420W14 REAR SUSPENSION END BUFFER - REPLACE
3	SHOCK ABSORBER EFFICIENCY CHECK	All OK	Problems encountered	Operation
	Check the efficiency of the shock absorbers by carrying out manual compression manoeuvres (resting on the wheel arch by the centre of the wheel), which should be carried out on both sides of the vehicle.	Move on to Step 5	Sudden return without damping	Replace the shock absorber that is not working properly Op. 4420A30 REAR SUSPENSION SHOCK ABSORBER (ONE), LEFT OR RIGHT - R.R. - CHECK WHEEL GEOMETRY SEPARATELY
4	VEHICLE GEOMETRY CHECK	All OK	Problems encountered	Operation
	After replacing the shock absorbers, check the geometry	End of diagnosis	Geometry values do not conform	Restore the geometry to the correct values Op. 4450A40 REAR WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT, INCLUDES ADJUSTMENT IF NECESSARY

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Parts & tools for this job For 2005 Fiat Croma

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