Poor braking action
- Make
- Alfa Romeo
- Model
- 147 Factory Service Manual
- Year
- 2000–2004
- Section
- Braking system › Poor braking action
Fault diagnosisPoor braking action
POOR BRAKING ACTION
As the pressure on the brake pedal increases, a corresponding braking action is not detected
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Check softness of brake pedal Check stiffness of brake pedal | Continue to Step 1 | Brake pedal too soft | See table F10 EXCESSIVE BRAKE PEDAL FREE PLAY | |
| Hardening of brake pedal | See table F12 BRAKE PEDAL HARD | |||
| 1 | CHECK ON CONTACT SURFACES | All OK | Problems met | Operation |
| Check type and surfaces of contact | Continue to Step 2 | Front pads or discs vitrified | Replace the pads Op. 3310A60or renew the disc surfaces | |
| Rear pads or discs vitrified | Replace the pads Op. 3310B60or renew the disc surfaces | |||
| Dirty surfaces | Clean the surfaces in question | |||
| Front disc contact surfaces damaged | Grind the discs, or replace, if necessary Op. 3310A48 | |||
| Rear disc contact surfaces damaged | Grind the discs, or replace, if necessary Op. 3310B48 | |||
| 2 | CHECK ON WHEEL CYLINDERS | All OK | Problems met | Operation |
| Check that the wheel cylinders are not seized | Continue to Step 3 | Front wheel cylinders seized | Replace front calipers Op. 3310A30 | |
| Front wheel cylinders seized | Replace rear calipers Op. 3310B36 | |||
| 3 | CHECK ON BRAKING ACTION | All OK | Problems met | Operation |
| Check that the braking effect does not decrease even after several braking actions | Continue to Step 4 | The braking effect decreases significantly | Change the brake/clutch fluid Op. 0010T64 | |
| 4 | CHECK ON 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' | ||
Parts & tools for this job For 2000 Alfa Romeo 147
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLSocket setSearch: socket set metric
- BOOKHaynes manualSearch: Haynes manual Alfa Romeo 147
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