| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.Check for the presence of faults in the engine management control unit | Move on to Step 2 | 1. Error detected in the control unit | 1. Continue following the instructions for the diagnostic equipment |
| 2. No communication with the control unit | 2. Restore the connection between the engine management control unit and the diagnostic connector: wiring diagram See E5060 CRUISE CONTROL |
| 2 | CRUISE CONTROL SELECTOR CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the Cruise Control contacts are working properly See Test 5580AA Cruise Control ON/OFF control check | Move on to Step 3 | No continuity | Replace the Cruise Control lever assemblySee Test 5580A10 CRUISE CONTROL LEVER ASSEMBLY - R+R |
| 3 | SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
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| With the ignition key in the ON position and the Cruise Control ON, check that there is a voltage signal from the Cruise Control to the engine management control unit: See E5060 CRUISE CONTROL | Move on to Step 4 | 1.No voltage detected | 1.Repair the connections: See E5060 CRUISE CONTROL |
| 2.Fuse broken | 2.Replace the fuse after having eliminated the cause |
| 4 | CONNECTIONS CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check the electrical continuity of the wiring between the junction unit, ignition switch, engine management control unit and Cruise Control system control: See E5060 CRUISE CONTROL | Move on to Step 5 | No continuity | Repair the connections: See E5060 CRUISE CONTROL |
| 5 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | End of diagnosis | The fault persists: control unit defective | Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |