| 0 | PRELIMINARY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check, by carrying out a road test, then the vehicle speed is higher than 40 km/h when the SET- ring nut is adjusted | Move on to Step 1 | Speed below 40 Km/h | Bring the speed to above 40 Km/h |
| 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: See E5060 CRUISE CONTROL |
| 2 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Connect the diagnostic equipment to the engine management control unit and check that the SET- position for the lever with the correct operaiton of the Cruise Control system contactsCheck the continuity of the Cruise lever contacts See Test 5580AD CHECK ON CRUISE CONTROL SET - CONTROL | Move on to Step 3 | 1.No continuity for lever contacts | 1. Replace the Cruise Control lever assembly Op. 5580A10 CRUISE CONTROL LEVER ASSEMBLY - R+R |
| 2. Power supply to lever interrupted | 2. Move on to Step 3 |
| 3 | SELECTOR CONTROL CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the Cruise Control contacts are working properly in the "-" position | Move on to Step 4 | No continuity | Replace the Cruise Control lever assembly Op. 5580A10 CRUISE CONTROL LEVER ASSEMBLY - R+R |
| 4 | SUPPLY CHECK | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| With the ignition key in the ON position and the Cruise Control in the ON position and the ring nut at "Set-", 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 5 | No voltage detected due to broken wiring | 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 by carrying out See Test 5580AE CRUISE CONTROL OPERATION ROAD TEST | End of diagnosis | The fault persists: control unit defective | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |