22 · Diagnostics

Drift whilst braking

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: STEERING – vehicle behaviour › Drift whilst braking

‹ Prev Vehicle drift Next › Steering hard / (steering in both directions)

Fault diagnosisDrift whilst braking

DRIFT WHILST BRAKING

During braking, the car pulls to the right or left.

If necessary, carry out a test on a straight, flat road with no cambers to check how much the car veers to one side.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily, check the type, condition and inflation pressure of the tyres Check that the wheels are correctly fixed	Continue to Step 1	Tyre inflation pressure not correct	Restore the tyre inflation pressures
			Tyres not suitable or worn	Replace the tyres
			Wheel fixing not correct	Tighten the wheels correctly Op. 4450B10
1	CHECK FRICTION SURFACES	All OK	Problems met	Operation
	Check: condition of pad friction surfaces condition of rear pad friction surfaces	Continue to Step 2	Friction surfaces vitrified or with traces of grease, oil or water	Clean, check and eliminate the causes of the fault
			Front brake pads damaged or wrong type	Replace pads Op. 3310A60
			Rear shoes damaged or wrong type	Replace the shoes Op. 3320B10
2	CHECK FRONT DISCS AND CALIPERS	All OK	Problems met	Operation
	Check condition of front brake discs Check the condition of the brake caliper pistons	Continue to Step 3	Front discs worn or damaged	Grind the discs Op. 3310A54, or replace if necessary
		Continue to Step 3	Front caliper pistons worn or seized	Replace brake calipers Op. 3310A30
3	CHECK REAR DRUMS	All OK	Problems met	Operation
	Check the condtion of the rear brake drums. Check the condition of the rear brake cylinders.	Continue to Step 4	Rear drums worn or damaged	Replace the drums Op. 3320B30
		Continue to Step 4	Shoe control cylinders worn or seized	Replace the cylinders Op. 3320B20
4	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the ABS control unit.	Continue to Step 5	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 5	Lack of dialogue with the control unit	Restore the connection between the ABS control unit and the diagnostic connector See E7020 ABS
5	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of: pump motor solenoids	Continue to Step 6	Pump and/or solenoids faulty	Replace electrohydraulic unit-electronic control unit Op. 3340A12
6	FRONT WHEEL GEOMETRY CHECK	All OK	Problems met	Operation
	Check the front wheel geometry and angles, Op. 4450A10	Continue to Step 7	Geometry not correct	Check and, if necessary, replace the damper Op. 4410A12
	Check the front wheel geometry and angles, Op. 4450A10	Continue to Step 7	Angles not correct	Restore, where possible, the correct angles
7	CHECK REAR WHEEL GEOMETRY	All OK	Problems met	Operation
	Check the rear wheel geometry and angles Op. 4450A40	Continue to Step 8	Geometry not correct	Check and, if necessary, replace the damper Op. 4420A30
			Geometry not correct	Check the spring and replace if necessary Op. 4420A48
			Angles not correct	Restore, where possible, the correct angles
8	CHECKING 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'

During braking, the car pulls to the right or left.

If necessary, carry out a test on a straight, flat road with no cambers to check how much the car veers to one side.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily, check the type, condition and inflation pressure of the tyres Check that the wheels are correctly fixed	Continue to Step 1	Tyre inflation pressure not correct	Restore the tyre inflation pressures
			Tyres not suitable or worn	Replace the tyres
			Wheel fixing not correct	Tighten the wheels correctly Op. 4450B10
1	CHECK FRICTION SURFACES	All OK	Problems met	Operation
	Check: condition of pad friction surfaces condition of rear pad friction surfaces	Continue to Step 2	Friction surfaces vitrified or with traces of grease, oil or water	Clean, check and eliminate the causes of the fault
			Front brake pads damaged or wrong type	Replace pads Op. 3310A60
			Rear shoes damaged or wrong type	Replace the shoes Op. 3320B10
2	CHECK FRONT DISCS AND CALIPERS	All OK	Problems met	Operation
	Check condition of front brake discs Check the condition of the brake caliper pistons	Continue to Step 3	Front discs worn or damaged	Grind the discs Op. 3310A54, or replace if necessary
		Continue to Step 3	Front caliper pistons worn or seized	Replace brake calipers Op. 3310A30
3	CHECK REAR DRUMS	All OK	Problems met	Operation
	Check the condtion of the rear brake drums. Check the condition of the rear brake cylinders.	Continue to Step 4	Rear drums worn or damaged	Replace the drums Op. 3320B30
		Continue to Step 4	Shoe control cylinders worn or seized	Replace the cylinders Op. 3320B20
4	CHECK BRAKE CIRCUIT	All OK	Problems met	Operation
	Check the condition of the brake circuit	Continue to Step 5	Leaks or damage in the components of the circuit	Replace the components involved
	Check the condition of the brake circuit	Continue to Step 5	Brake servo faulty	Replace the brake servo assembly Op. 3330D10
5	FRONT WHEEL GEOMETRY CHECK	All OK	Problems met	Operation
	Check the front wheel geometry and angles, Op. 4450A10	Continue to Step 6	Geometry not correct	Check and, if necessary, replace the damper Op. 4410A12
	Check the front wheel geometry and angles, Op. 4450A10	Continue to Step 6	Angles not correct	Restore, where possible, the correct angles
6	CHECK REAR WHEEL GEOMETRY	All OK	Problems met	Operation
	Check the rear wheel geometry and angles Op. 4450A40	Continue to Step 7	Geometry not correct	Check and, if necessary, replace the damper Op. 4420A30
			Geometry not correct	Check the spring and replace if necessary Op. 4420A48
			Angles not correct	Restore, where possible, the correct angles
7	CHECKING 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 Vehicle drift Next › Steering hard / (steering in both directions)

Parts & tools for this job For 1998 Fiat Multipla

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