22 · Diagnostics

Drift whilst braking

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: STEERING – vehicle behaviour › Drift whilst braking

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

Fault diagnosisDrift whilst braking

DRIFT WHILST BRAKING

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check that the brake pedal is not too soft	Continue to Step 1	Brake pedal too soft	See table F10 EXCESSIVE BRAKE PEDAL FREE PLAY
1	CHECK FOR FLUID LEAKS	All OK	Problems met	Operation
	Check that there are no fluid leaks from: calipers wheel cylinders master cylinder	Continue to Step 2	Fluid leak from a caliper	Replace the faulty caliper Op. 3310A30
		Continue to Step 2	Fluid leak from a caliper	Replace the faulty wheel cylinder Op. 3320B20
2	CHECK ON BRAKE WEAR	All OK	Problems met	Operation
	Check the brakes for wear	Continue to Step 3	Brakes very worn	Overhaul the brakes
3	CHECK WHEEL GEOMETRY	All OK	Problems met	Operation
1.9 DIESEL	Check the geometry and track of the wheel axle	Continue to Step 4	Wheel geometry incorrect	Restore the correct wheel geometry Op. 4450A10
1.2 8v	Check the geometry and track of the wheel axle	Continue to Step 7	Wheel geometry incorrect	Restore the correct wheel geometry Op. 4450A10
1.2 8v ABS	Check the geometry and track of the wheel axle	Continue to Step 5	Wheel geometry incorrect	Restore the correct wheel geometry Op. 4450A10
4	CHECK LOCKING OF REAR WHEELS	All OK	Problems met	Operation
1.9 DIESEL	Carry out a braking action and check that the rear wheels do not lock	Continue to Step 7	The rear wheel lock	Calibrate or, if necessary, replace the load proportioning valve Op. 3330C60
1.9 DIESEL ABS	Carry out a braking action and check that the rear wheels do not lock	Continue to Step 5	The rear wheel lock	Calibrate or, if necessary, replace the load proportioning valve Op. 3330C60
5	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
1.9 DIESEL ABS	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no faults in the ABS control unit	Continue to Step 6	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
1.9 DIESEL ABS		Continue to Step 6	An error is detected in the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E7020 ABS
6	CHECK ON DRIFT	All OK	Problems met	Operation
1.9 DIESEL ABS	Disconnect the ABS hydraulic control unit	Check whether there is drifting during braking at variable speeds Continue to Step 7	Vehicle does not drift during braking	Replace the ABS hydraulic control unit (with the diagnostic equipment in active diagnosis) Op. 3340A12
7	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Test the vehicle before delivery to the customer, to check that the fault is no longer present. The test is essential, as the braking system involves a safety feature of the car		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 2000 Fiat Doblò

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