Abs and handbrake warning lights both on
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Instrument panel › Abs and handbrake warning lights both on
ABS AND HANDBRAKE WARNING LIGHTS BOTH ON
The handbrake lever is released
The handbrake warning light also indicates a low brake fluid level and, if it is on at the same time as the ABS warning light, a malfunction of the EBD system. The command to switchon the handbrake warning light is sent by the switch on the lever to the Body Computer Node which makes it available on the B-CAN to the Instrument Panel Node.
| Results of the tests | ||||
| 1 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect an EXAMINER and check the following on CAN NETWORK INFORMATION: - No control units inactive - No faulty control units - No control units with faulty CAN line | Move on to Step 2 | 1. Fault on CAN network 2. Communication impossible with the Body Computer | 1. Continue following the instructions for the diagnostic equipment 2. Move on to Step 8 | |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Keeping the diagnostic equipment connected, check that there are no CAN faults at the BRAKE NODE | Move on to Step 3 | Fault on C-CAN network | Continue following the instructions for the diagnostic equipment | |
| 3 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Using an Examiner check, in Instrument Panel mode, that there are no errors and that the parameters are present. | Move on to Step 4 | Presence of errors | Continue following the instructions on the diagnostic instrument | |
| 4 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
| Check the electricity supply to the Instrument Panel Node is correct | Move on to Step 5 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow). | |
| 5 | CHECK ELECTRICAL CONNECTIONS | All OK | Problems encountered | Operation |
| Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected. | Move on to Step 6 | Electrical connections not operational | Renew the damaged electrical connections | |
| 6 | ACTIVE DIAGNOSIS CHECK | All OK | Problems encountered | Operation |
| With the Examiner in the Instrument Panel Node ambient check that the warning lights are correctly activated in Active Diagnosis. | Move on to Step 7 | The warning lights do not flash | Replace the Instrument Panel | |
| 7 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Using an Examiner check, in Body Computer Node mode, that there are no errors. | Move on to Step 9 | 1. Impossible to connect to the Body Computer control unit. 2. Presence of errors | 1. Move on to Step 8 2. Continue by following the instructions on the diagnostic instrument | |
| 8 | ELECTRICAL POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
| Check the electricity supply to the Body Computer Node is correct. | Move on to Step 9 | Fault in positive electrical supply and/or earth | Replace defective component (in the case of a fuse, find out what caused it to blow). | |
| 9 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
| Use an Examiner to check the possibility of connection to the Body Computer Node | End of diagnosis | Impossible to connect to the Body Computer control unit. | Replace Body Computer | |
Parts & tools for this job For 2005 Fiat Grande Punto
- TOOLOBD2 scanner with ABSSearch: OBD2 scanner ABS SRS
- TOOLDigital multimeterSearch: automotive digital multimeter
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