Abs not working / (one wheel locked)
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Brakes › Abs not working / (one wheel locked)
ABS NOT WORKING / (ONE WHEEL LOCKED)
When the brakes are operated briskly and suddenly (emergency braking) the ABS does not work and, as a result, one of the wheels locks
The locking of one of the wheels may, in certain circumstances, be a normal reaction of the system (see operation of the ABS system). This is possible, in particular, on uneven roads
| Results of the tests | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect the Examiner diagnostic equipment to the diagnostic socket. Check: - that there are no faults in the ABS control unit; - the plausibility of all the parameters | Move on to Step 2 | 1. Error detected in the control unit 2. No communication with the control unit | 1. Continue following the instructions for the diagnostic equipment 2. Restore connection between the ABS control unit and the diagnostic connector see | |
| 2 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Keeping the Examiner diagnostic equipment connected carry out the active diagnosis of: - pump motor; - solenoid valves | Move on to Step 3 | Fault detected in one of the solenoid valves | Replace the electrohydraulic unit - ABS electronic control unit Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R. | |
| 3 | CHECK FOR PRESENCE OF AIR | All OK | Problems encountered | Operation |
| Check for the presence of air in the system | Move on to Step 4 | Presence of air in the system | Bleed the air from the system | |
| 4 | CHECK ON PIPES / HOSES AND BLEED BRAKES | All OK | Problems encountered | Operation |
| Visually inspect that there are no bends or constrictions in the brake pipes | Move on to Step 5 | Presence of bends or constrictions | Replace the section of pipe affected by the problem | |
| 5 | BRAKE CALIPER CHECK | All OK | Problems encountered | Operation |
| Check the sliding of the brake caliper control pistons | End of diagnosis | 1. Front caliper pistons seized 2. Rear caliper pistons seized | 1. Replace the front brake calipers Op. 3310A30 FRONT BRAKE CALIPER (ONE) - R.R 2. Replace the rear brake calipers | |
Parts & tools for this job For 2005 Fiat Grande Punto
- TOOLOBD2 scanner with ABSSearch: OBD2 scanner ABS SRS
- TOOLDigital multimeterSearch: automotive digital multimeter
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.