Rear wheels lock whilst braking
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Brakes › Rear wheels lock whilst braking
REAR WHEELS LOCK WHILST BRAKING
When the brakes are operated the distribution between the front and rear wheels is not correct: in extreme conditions the rear wheels lock and the vehicle may skid
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
For the 1.9 JTD; First of all check whether the ABS warning light and the handbrake warning light come on simultaneously during starting and then go out | Move on to Step 1 | The two warning lights both remain on after starting | Proceed as instructed | |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
For the 1.9 JTD; Connect the Examiner diagnostic equipment to the diagnostic socket. Check that there are no faults in the ABS control unit | 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; - ABS control unit supply | |
| 2 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
For the 1.9 JTD; 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 ABS electronic control unit - electrohydraulic unit Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R. | |
| 3 | REAR BRAKE CALIPER CHECK | All OK | Problems encountered | Operation |
For the 1.9 JTD; Check the condition of the rear brake caliper pistons | Move on to Step 4 | Pistons worn or seized | Replace the rear brake calipers | |
| 4 | CHECK ON FLEXIBLE BRAKE PIPES AND BLEEDING | All OK | Problems encountered | Operation |
For the 1.9 JTD; Visually inspect that there are no bends or constrictions in the brake pipes, bleed the system and check that the fluid comes out evenly from the bleed screws. | Move on to Step 5 | Bends or constrictions present, the fluid does not come out evenly | Replace the section of pipe affected by the problem | |
| 5 | FRONT BRAKE STATE CHECK | All OK | Problems encountered | Operation |
For the 1.9 JTD; Visually inspect that there is no grease, oil or dirt on the front braking surfaces | End of diagnosis | Braking surfaces dirty | Clean, check and eliminate the causes of the problem: if necessary, replace the front pads | |
Parts & tools for this job For 2005 Fiat Grande Punto
- PARTBrake padsSearch: Fiat Grande Punto 2005 brake pads
- TOOLBrake bleeder kitSearch: one man brake bleeder kit
- FLUIDBrake fluidSearch: brake fluid
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