22 · Diagnostics

Forecarriage transverse vibrations

Make: Fiat
Model: Grande Punto Factory Service Manual
Year: 2005–2012
Section: Noise / vibrations › Forecarriage transverse vibrations

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Fault diagnosisForecarriage transverse vibrations

FORECARRIAGE TRANSVERSE VIBRATIONS

Whilst driving, especially on unmade roads, there are transverse vibrations at the front section. This diagnosis can only be made after diagnosis

See table S015 NOISE WHILST DRIVING

Carry out the latter first.

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	After having carried out the road test, there is transverse vibration at the front end. See table S015 NOISE WHILST DRIVING Continue depending on the circumstances in which the vibration occurs	End of diagnosis	1. The vibration is noticeable during take off 2. The vibration is accompanied by noise which increases with speed 3. The vibration is accompanied by noise over unmade roads	1. Move on to Step 5 2. Move on to Step 2 3. Move on to Step 1
1	WHEEL SIDE CONSTANT VELOCITY JOINT CHECK	All OK	Problems encountered	Operation
	For the 1.3 JTD, 1.9 JTD; Raise the vehicle on a two column lift and check: - that the driveshaft-wheel side joint matching is correct; - that the seal is present.	Move on to Step 2	1. Incorrect matching 2. Sealing ring missing	1. Replace the constant velocity joint and the driveshaft Op. 2710A10 DRIVESHAFT WITH JOINTS (ONE), L/H OR R/H - R + R 2. Replace the constant velocity joint and the driveshaft Op. 2710A10 DRIVESHAFT WITH JOINTS (ONE), L/H OR R/H - R + R
1	WHEEL SIDE CONSTANT VELOCITY JOINT CHECK	All OK	Problems encountered	Operation
	For the 1.2 8v, 1.4 8v; Raise the vehicle on a two column lift and check: - that the driveshaft-wheel side joint matching is correct; - that the seal is present.	Move on to Step 2	1. Incorrect matching 2. Sealing ring missing	1. Replace the constant velocity joint and the driveshaft Op. 2710A40 DRIVESHAFT (ONE), LEFT OR RIGHT - R.R. 2. Replace the constant velocity joint and the driveshaft Op. 2710A40 DRIVESHAFT (ONE), LEFT OR RIGHT - R.R.
2	WHEEL SIDE JOINT CLEARANCE CHECK	All OK	Problems encountered	Operation
	For the 1.3 JTD, 1.9 JTD; Check that the clearance for the wheel side constant velocity joint is not too great.	Move on to Step 3	Excessive clearance compared with the opposite wheel side joint	Replace the wheel side constant velocity joint and grease correctly Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT
2	WHEEL SIDE JOINT CLEARANCE CHECK	All OK	Problems encountered	Operation
	For the 1.2 8v, 1.4 8v; Check that the clearance for the wheel side constant velocity joint is not too great.	Move on to Step 3	Excessive clearance compared with the opposite wheel side joint	Replace the wheel side constant velocity joint and grease correctly Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT
3	WHEEL SIDE JOINT SEIZING CHECK	All OK	Problems encountered	Operation
	For the 1.3 JTD, 1.9 JTD; Rotate the wheel by hand and check that there is no seizing of the wheel side constant velocity joint	Move on to Step 4	There is seizing of the wheel side joint	Replace the constant velocity joint and grease correctly Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT
3	WHEEL SIDE JOINT SEIZING CHECK	All OK	Problems encountered	Operation
	For the 1.2 8v, 1.4 8v; Rotate the wheel by hand and check that there is no seizing of the wheel side constant velocity joint	Move on to Step 4	There is seizing of the wheel side joint	Replace the constant velocity joint and grease correctly Op. 2710A20 WHEEL SIDE CONSTANT VELOCITY JOINT (ONE), L/H OR R/H - R + R WITH DRIVESHAFT REMOVED - INCLUDES BOOT REPLACEMENT
4	WHEEL SIDE JOINT TIGHTENING CHECK	All OK	Problems encountered	Operation
	Remove the left and/or right wheel. Op. 4450B02 LEFT FRONT WHEEL - R.R Op. 4450B04 RIGHT FRONT WHEEL - R.R Check that the constant velocity joint fastening nut is tightened and that the staking is in place.	Move on to Step 5	Nut loosening	Replace the nut, restore the torque tightening and stake Op. 4450C32 ONE FRONT WHEEL HUB BEARING, LH OR RH - REPLACE
5	CLUTCH PLATE CHECK	All OK	Problems encountered	Operation
	For 1.9 JTD; Check that there is no irregular wear on the surface of the clutch plate.	Move on to Step 6	Surface of the clutch plate worn unevenly	Replace the assembly Op. 1810A20 CLUTCH - R + R
5	CLUTCH PLATE CHECK	All OK	Problems encountered	Operation
	For 1.2 8v, 1.4 8v, 1.3 JTD; Check that there is no irregular wear on the surface of the clutch plate.	Move on to Step 6	Surface of the clutch plate worn unevenly	Replace the assembly Op. 1810A20 CLUTCH - R + R
6	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	The fault is due to another system (engine, gearbox, differential, suspension). Search for the cause in one of these systems, following the appropriate diagnostic procedures.

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Parts & tools for this job For 2005 Fiat Grande Punto

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