| | Test results |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | All OK | Problems encountered | Operation |
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| 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 battery2. The detail is parameter not plausible3. The detail is control locked in pressed position | 1. Move on to Step 42. Move on to Step 43. Move on to Step 2 |
| 2 | CHECK CRUISE CONTROL COMMANDS | All OK | Problems encountered | Operation |
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| For the 1.2 8v, 1.4 8v;Check that the Cruise Control system controls are working properlyCheck 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 contacts2. Incorrect operation of engine management control unit3. 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 |
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| 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 properlyCheck 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 contacts2. Incorrect operation of engine management control unit3. 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.R 3.Restore the continuity/insulation |
| 3 | EARTH POWER SUPPLY CHECK | All OK | Problems encountered | Operation |
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| Check that the cruise control lever connector is correctly supplied | Move on to Step 4 | Earth supply signal interrupted | Restore the correct connection See E5060 CRUISE CONTROL |
| 4 | CONNECTIONS CHECK | All OK | Problems encountered | Operation |
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| 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 See E5060 CRUISE CONTROL |
| 5 | CAN CHECK | All OK | Problems encountered | Operation |
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| Check the correct operation of the CAN using the Examiner | Move on to Step 6 | 1. CAN connections defective2. Body Computer defective | 1. Restore the correct connections2. Replace body computer Op. 5505A32 BODY COMPUTER - R.R |
| 6 | CORRECT OPERATION CHECK | All OK | Problems encountered | Operation |
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| Check that the fault is no longer present See Test 5580AE CRUISE CONTROL OPERATION ROAD TEST | End of diagnosis | The fault persists | Contact the Service Department for further information on the problem |
