D72 Cruise control set+ control not working
- Make
- Alfa Romeo
- Model
- 147 Factory Service Manual
- Year
- 2000–2002
- Section
- Engine › D72 Cruise control set+ control not working
D72 Cruise control set+ control not working
The Cruise Control system does not increase the speed when the knob is set to '+'.
NOTA: For safety reasons, the Cruise Control is inhibited above a maximum speed and below a limit speed. If these speeds are exceeded, even because of a fault, the Cruise Control does not work any more
| Step | Test procedure | Result | Action |
|---|---|---|---|
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that there are no faults in the engine management control unit | OK | |
| An error is detected in the control unit |
End of diagnosis | ||
| Lack of dialogue with the control unit |
End of diagnosis | ||
| 2 | CHECK CRUISE CONTROL SELECTOR Check that the Cruise Control contacts are working | OK | |
| Lack of continuity |
End of diagnosis | ||
| 3 | SUPPLY CHECK With the ignition and Cruise Control knob set to 'ON' and '+', check that there is a voltage signal from the Cruise Control system control to the engine management control unit: Wiring diagram E5060 CRUISE CONTROL | OK | |
| No voltage found |
End of diagnosis | ||
| 4 | CHECK ON CORRECT OPERATION Check that the fault is no longer present | OK | Incorrect selection of diagnostic procedure |
| The fault persists: control unit faulty |
Incorrect selection of diagnostic procedure |
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