Abs and handbrake warning lights both on
- Make
- Fiat
- Model
- 500 Factory Service Manual
- Year
- 2007–2024
- Section
- Instrument panel › Abs and handbrake warning lights both on
ABS AND HANDBRAKE WARNING LIGHTS BOTH ON
With the ignition on, the ABS warning light and the handbrake warning light come on simultaneously and stay on for longer than 3 seconds (both warning lights should go off after the initial control unit test)
If it comes on at the same time as the ABS warning light, the low brake fluid level and handbrake warning light also indicates an EBD fault.
Warning: Under these circumstances, the rear wheels may lock and the vehicle may skid if the brakes are operated because the system EBD function is temporarily deactivated. If it comes on alone, this means that the handbrake is on or the brake fluid level is too low
| Test results | ||||
| 1 | WARNING LIGHTS ACTIVATION CHECK | All OK | Problems encountered | Operation |
|---|---|---|---|---|
| Connect the Examiner to the Instrument Panel Node and check that the ABS and handbrake warning lights are correctly activated in active diagnosis | Move on to Step 2 | The warning lights do not flash. | Replace the instrument panel | |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
Connect an Examiner to the ABS control unit Check that there are no faults | Move on to Step 3 | 1. Error detected in the control unit 1. No communication with the control unit | 1. Continue following the instructions on the diagnostic equipment 2. Move on to Step 3 | |
| 3 | CORRECT POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
Check that the ABS control unit is receiving the correct power supply Check that the connector for the ABS control unit is correctly fitted | End of diagnosis | 1. Control unit power supply interrupted 2. ABS control unit defective | 1. Restore correct power supply 2. Replace ABS control unit Op. 3340A12 ABS HYDRAULIC AND ELECTRONIC CONTROL UNIT - R.R. | |
Parts & tools for this job For 2007 Fiat 500
- TOOLOBD2 scanner with ABSSearch: OBD2 scanner ABS SRS
- TOOLDigital multimeterSearch: automotive digital multimeter
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