Cruise control not working under any conditions
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Engine › Cruise control not working under any conditions
CRUISE CONTROL NOT WORKING UNDER ANY CONDITIONS
The Cruise Control system controls do not work under any circumstances
| Test results | ||||
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
|---|---|---|---|---|
Connect the Examiner diagnostic equipment to the diagnostic socket, go to the Body Computer Node and check for the presence of the following error: - error B1029 | Move on to Step 2 | 1. The detail is open circuit to battery 2. The detail is parameter not plausible 3. The detail is control locked in pressed position | 1. Move on to Step 4 2. Move on to Step 4 3. Move on to Step 2 | |
| 2 | CHECK CRUISE CONTROL COMMANDS | All OK | Problems encountered | Operation |
For the 1.2 8v, 1.4 8v; Check that the Cruise Control system controls are working properly Check the continuity of the K line connecting the cruise control lever with the body computer | Move on to Step 3 | 1. No continuity for lever contacts 2. Incorrect operation of engine management control unit 3. K line broken/short circuit | 1.Replace the steering column switch unit assembly Op. 5550A10 STALK UNIT ASSEMBLY - R+R 2. Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R 3.Restore the continuity/insulation | |
| 2 | CHECK CRUISE CONTROL COMMANDS | All OK | Problems encountered | Operation |
For the 1.3 JTD 75 CV, 1.3 JTD 90 CV, 1.9 JTD 8v; Check that the Cruise Control system controls are working properly Check the continuity of the K line connecting the cruise control lever with the body computer | Move on to Step 3 | 1. No continuity for lever contacts 2. Incorrect operation of engine management control unit 3. K line broken/short circuit | 1.Replace the steering column switch unit assembly Op. 5550A10 STALK UNIT ASSEMBLY - R+R 2. Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R 3.Restore the continuity/insulation | |
| 3 | EARTH POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
| Check that the cruise control lever connector is correctly supplied | Move on to Step 4 | Earth supply signal interrupted | Restore the correct connection | |
| 4 | CONNECTIONS CHECK | All OK | Problems encountered | Operation |
| Check the electrical continuity of the wiring between the cruise control system control and the body computer | Move on to Step 5 | No continuity | Restore the correct connections | |
| 5 | CAN CHECK | All OK | Problems encountered | Operation |
| Check the correct operation of the CAN using the Examiner | Move on to Step 6 | 1. CAN connections defective 2. Body Computer defective | 1. Restore the correct connections 2. Replace body computer | |
| 6 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
Check that the fault is no longer present | End of diagnosis | The fault persists | Contact the Service Department for further information on the problem | |
Parts & tools for this job For 2005 Fiat Grande Punto
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