| STEP | OPERATIONS TO BE CARRIED OUT | TEST RESULTS |
|---|
| 0 | PRELIMINARY CHECKS | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| First, check:- correct earth fastening on engine;
- correct battery earth fastening (Wiring Diagram ) E1020 EARTHS
- positive battery pole and all leads connected to it correctly fastened (Wiring Diagram ) E1010 POWER SUPPLY
- no water in the fuel
| Move on to Step | 1. Earth leads fastening not correct | 1. Restore or, if necessary, replace the battery earth lead See in Op. 5530B22 battery earth lead - r+r |
| 2. Positive battery lead fastenings not correct | 2. Restore the positive battery lead See in Op. 5530B26 LEAD between battery and starter motor - R.R. |
| 3. Water in the fuel | 3. Replace the fuel |
| 1 | CHECK USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Connect the diagnostic test equipment (Examiner or other instruments) to the tester input.Check:- that there are no faults in the engine management control unit;
- the plausibility of all the parameters
| Move on to Step | 1. Error detected in the control unit | 1. Continue following the instructions in the diagnostic table |
| 2. Parameter not consistent | 2. Continue following the instructions in the diagnostic table |
| 2 | ROAD TEST USING DIAGNOSTIC EQUIPMENT | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected.Check:- that there are no faults in the engine management control unit;
- the plausibility of all the parameters
| Move on to Step | 1. The sudden onset of an error in the control unit is detected | 1. Continue following the instructions in the diagnostic table |
| 2. Parameter not consistent | 2. Continue following the instructions in the diagnostic table |
| 3. Loss of dialogue between the control unit and the diagnostic equipment | 3. Restore the control unit circuit supply (Wiring Diagram ) E5030 PETROL ENGINE ELECTRONIC MANAGEMENT |
| 3 | FUEL PRESSURE ROAD TEST | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Carry out a road test and check the fuel supply pressure See in Op. 0510C10 FUEL SYSTEM - Check DELIVERY PRESSURE | Make sure that the conditions in which the problem occurs are reproduced |
| Move on to Step | 1. Pressure not correct: obstructions in the pipe | 1. Remove the obstructions in the fuel pipe, replace it if necessary |
| 2. Pressure not correct: petrol pump damaged | 2. Replace the petrol pump assembly See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R. |
| 4 | CHECK ON CORRECT OPERATION | ALL OK | PROBLEMS ENCOUNTERED | ACTION |
|---|
| Check that the fault is no longer present | | Fault persists control unit defective | Replace the control unit See in Op. 1056B82 Injection/ignition system CONTROL UNIT (one) - R.R. |