18 · Diagnostics

F01 Poor braking action

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Brakes › F01 Poor braking action

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Fault diagnosisF01 Poor braking action

F01 Poor braking action

As the pressure on the brake pedal increases, a corresponding braking action is not detected

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Check softness of brake pedal Check stiffness of brake pedal	OK	Move onto step 1
		Brake pedal too soft	See table F10 EXCESSIVE BRAKE PEDAL STROKE End of diagnosis
		Brake pedal too soft	See table F12 BRAKE PEDAL STIFF End of diagnosis
1	CHECK ON CONTACT SURFACES Check type and surfaces of contact	OK	Move onto step 2
		Front pads or discs vitrified	Replace the pads Op. 3310A60 or renew the disc surfaces End of diagnosis
		Front pads or discs vitrified	Replace the pads Op. 3310B60 or renew the disc surfaces End of diagnosis
		Front pads or discs vitrified	Clean the surfaces in question End of diagnosis
		Front pads or discs vitrified	Grind the discs, or replace, if necessary Op. 3310A48 End of diagnosis
		Front pads or discs vitrified	Grind the discs, or replace, if necessary Op. 3310B48 End of diagnosis
2	CHECK ON WHEEL CYLINDERS Check that the wheel cylinders are not seized	OK	Move onto step 3
		Front wheel cylinders seized	Replace front calipers Op. 3310A30 End of diagnosis
		Front wheel cylinders seized	Replace rear calipers Op. 3310B36 End of diagnosis
3	CHECK ON BRAKING ACTION Check that the brake effect does not decrease even after several braking actions	OK	Move onto step 4
		The braking effect decreases significantly	Change the brake/clutch fluid Op. 0010T62 End of diagnosis
		The braking effect decreases significantly	Change the brake fluid Op. 0010T60 End of diagnosis
4	CHECK WITH DIAGNOSTIC EQUIPMENT Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no faults in the ABS control unit	OK	Move onto step 5
		An error is detected in the control unit	Continue following the instructions for the diagnostic equipment End of diagnosis
		Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector Wiring diagram E7020 ABS End of diagnosis
5	CORRECT OPERATION CHECK Test the vehicle before delivery to the customer, to check that the fault is no longer present NOTE: The test is essential, as the braking system involves a safety feature of the car	OK	Incorrect selection of diagnostic procedure
5		Fault persists	Incorrect selection of diagnostic procedure

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Parts & tools for this job For 2000 Alfa Romeo 147

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