F20 Abs not working properly
- Make
- Alfa Romeo
- Model
- 156 Factory Service Manual
- Year
- 1997–2002
- Section
- Brakes › F20 Abs not working properly
F20 Abs not working properly
When the brakes are operated vigorously and suddenly ("panic" braking), the ABS does not work properly, so one or more wheels lock(s).
| Step | Test procedure | Result | Action |
|---|---|---|---|
| 0 | PRELIMINARY CHECKS Turn the ignition on and check that the "ABS fault" warning light comes on for about 4 seconds, and then goes out. | OK | |
| The "ABS fault" warning light comes on and stays on | Move onto step (see K60) | ||
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check:
| OK | |
| An error is detected in the control unit |
End of diagnosis | ||
| Lack of dialogue with the control unit |
End of diagnosis | ||
| 2 | ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of:
| OK | |
| Fault detected in the pump or a solenoid |
End of diagnosis | ||
| Fault detected in a front sensor |
End of diagnosis | ||
| Fault detected in a rear sensor |
End of diagnosis | ||
| Fault detected in a front wheel hub |
End of diagnosis | ||
| Fault detected in a rear wheel hub |
End of diagnosis | ||
| 4 | CHECK CORRECT OPERATION Check that the fault is no longer present | OK | End of diagnosis |
| Fault persists | Incorrect selection of diagnostic procedure |
Parts & tools for this job For 1997 Alfa Romeo 156
- TOOLOBD2 scanner with ABSSearch: OBD2 scanner ABS SRS
- TOOLDigital multimeterSearch: automotive digital multimeter
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