22 · Diagnostics

Vehicle drift

Make: Lancia
Model: Ypsilon Factory Service Manual
Year: 2003–2011
Section: STEERING – vehicle behaviour › Vehicle drift

‹ Prev Handbrake not efficient Next › Drift whilst braking

Fault diagnosisVehicle drift

VEHICLE DRIFT

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	check condition of the tyres front and rear wheel geometry	Continue to Step 1	Wheels braked	Replace the tyres (Op. 4450B21)
			Wheels braked	Balance the wheels (Op. 4450B40)
			Wheels braked	Restore the correct wheel geometry ( Op. 4450A10)
			Wheels braked	Restore the correct wheel geometry ( Op. 4450A40)
			Wheels braked	Restore the correct wheel geometry ( Op. 4450A90)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450C10)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450C32)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450D10)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 3310A30)
1	CHECK ON DRIFT	All OK	Problems met	Operation
	Test the vehicle on a straight line, on a good road surface and with no wind and check that there is no drift	End of diagnosis	The car drifts	Swap over the front wheels Continue to Step 2
2	CHECK ON DRIFT	All OK	Problems met	Operation
	Test the vehicle on a straight line, on a good road surface and with no wind and check that there is no drift	End of diagnosis	The car continues to drift in the same direction	Replace the tyres (Op. 4450B21) Continue to Step 3
		End of diagnosis	The car continues to drift in the same direction	Swap over the front/rear wheels on the same side Continue to Step 3
3	CHECK ON WHEEL GEOMETRY	All OK	Problems met	Operation
	Check the front and rear wheel geometry	Continue to Step 4	Wheels braked	Restore the correct wheel geometry ( Op. 4450A10)
			Wheels braked	Restore the correct wheel geometry ( Op. 4450A40)
			Wheels braked	Restore the correct wheel geometry ( Op. 4450A90)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450C10)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450C32)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 4450D10)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned (Op. 3310B32)
			Wheels braked	Check the condition of the bearings, hubs and calipers If necessary replace the parts concerned ( Op. 3310A30)
4	CHECK ON STEERING WHEEL LOAD	All OK	Problems met	Operation
	Check that during steering, there are no changes in load on the still steering wheel with wheels both on the ground and raised	Continue to Step 5	A change in load on the steering wheel is observed	Rotate the steering column by 90° around its axis and straighten the steering wheel spokes (Op. 4110A14)
5	CHECK ON DRIFT	All OK	Problems met	Operation
	Test the vehicle on a straight line, on a good road surface and with no wind and check that there is no drift	Continue to Step 6	The vehicle still drifts	Replace the differential unit ( Op. 2110D10)
6	CHECK ON STEERING WHEEL RETURN	All OK	Problems met	Operation
	Test the vehicle on a straight line, on a good road surface and with no wind and check that there is no drift when the steering wheel returns after a steering action	Continue to Step 7	The vehicle drifts on return of the steering wheel: different caster on right and left	Restore the correct caster
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

‹ Prev Handbrake not efficient Next › Drift whilst braking

Parts & tools for this job Staging For 2003 Lancia Ypsilon

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