| | Test results |
| 0 | PRELIMINARY CHECKS | All OK | Problems encountered | Operation |
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| Check that the MIL warning light is on before starting and goes out once the engine has been started up.Also check that no accessories have been fitted in the after-market. | Move on to Step 1 | The MIL warning light does not come on when the key is inserted | Continue as instructed in the See table K100 MIL WARNING LIGHT NOT WORKING (REMAINS OFF BEFORE STARTING) |
| The MIL warning remains on with the engine started | Continue as instructed in the See table K101 MIL WARNING LIGHT STAYS ON (ENGINE STARTS) |
| There are accessories present that have been fitted in the after-market | Check that these accessories have been fitted correctly |
| 1 | CONTROL UNIT ELECTRICAL CONNECTIONS CHECK | All OK | Problems encountered | Operation |
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| Check that the engine management control unit electrical connections are correct See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT In particular, check that:- the earth is connected correctly- the resistance between the control unit See M010 ENGINE MANAGEMENT ECU and the battery negative See A001 BATTERY is less than 0.5 Ohm | Move on to Step 2 | Connections to earth incorrect | Restore the correct connections |
| Resistance to battery negative more than 0.5 Ohm | Restore the correct connections |
| 2 | CONTROL UNIT FASTENING CHECK | All OK | Problems encountered | Operation |
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| Check that the control unit is correctly fastened in its housing Op. 1056F82 CONTROL UNIT SINGLE OF INJECTION IGNITION SYSTEM R R | Move on to Step 3 | Control unit fastening incorrect | Renew the correct fastening of the control unit Op. 1056F82 CONTROL UNIT SINGLE OF INJECTION IGNITION SYSTEM R R |
| 3 | ERRORS IN CONTROL UNIT CHECK | All OK | Problems encountered | Operation |
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| Connect the diagnostic equipment and check that there are no errors present in the control unit | Move on to Step 4 | There are errors present in the control unit | Continue as described by the diagnostic equipment |
| 4 | FUEL FEED CIRCUIT CHECK | All OK | Problems encountered | Operation |
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| Check there are no faults in the fuel supply circuit by performing the See Test 1040OA FUEL SUPPLY CIRCUIT CHECK | Move on to Step 5 | There are faults present | The operation to solve the problem is described in the actual test |
| 5 | CHECK FOR THE PRESENCE OF IMPURITIES IN THE FUEL | All OK | Problems encountered | Operation |
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| Check that there is no water, alcohol or particles in suspension in the fuel by carrying out the See T FUEL QUALITY CHECK | Move on to Step 6 | There are faults present | The operation to solve the problem is described in the actual test |
| 6 | INJECTOR CHECK | All OK | Problems encountered | Operation |
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| Check that the injectors are not stuck shut or not perfectly closed by carrying out the See Test 1056BA INJECTOR OPERATION CHECK | Move on to Step 7 | There are faults present | The operation to solve the problem is described in the actual test |
| 7 | DETONATION SENSOR ERRORS CHECK | All OK | Problems encountered | Operation |
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| Connect the diagnostic equipment and check that none of the following errors is present: P0325, P0330 | Move on to Step 8 | One or more of the errors indicated is present | Continue as described by the diagnostic equipment |
| 8 | IGNITION COIL CHECK | All OK | Problems encountered | Operation |
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| Check that the ignition coils are correctly fitted in their seats.Also check that they do not show signs of corrosion or dampness.Lastly, check that the ignition coils are working properly, by carrying out the test See Test 5510CC IGNITION COIL CHECK | Move on to Step 9 | One of the coils is not correctly fitted | Refit the coil correctly Op. 5510C14 IGNITION COIL/S - R.R. |
| One of the coils shows signs of corrosion/dampness | Replace the coil Op. 5510C14 IGNITION COIL/S - R.R. |
| One of the coils is not working properly | The operation to solve the problem is described in the actual test |
| 9 | OVERHEATING CHECK | All OK | Problems encountered | Operation |
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| Check the following, in order:- that there are no obvious signs of engine overheating.- that there is sufficient engine coolant of the correct type.- that there are no coolant leaks- that the radiator is correctly fitted and there are no obstructions preventing the flow of air through the structure | Move on to Step 10 | There are signs of engine overheating | Continue as instructed in the See table K026 ENGINE COOLANT OVERHEATING WARNING LIGHT NOT WORKING |
| Coolant fluid level insufficient | Top up the engine coolant Op. 0010T21 ENGINE COOLANT - CHECK DENSITY AND CHANGE, IF NECESSARY |
| Incorrect type of coolant | Change the coolant Op. 0010T20 ENGINE COOLANT - CHANGE |
| Coolant leaks | Continue as instructed in the See table X10 ENGINE COOLANT LEAKS |
| Radiator fitted incorrectly or with obvious signs of the air flow obstructed | Restore the correct fitting of the components. Replace the faulty components, if necessary |
| 10 | CYLINDER COMPRESSION CHECK | All OK | Problems encountered | Operation |
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| Carry out the cylinder compression check Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS | Move on to Step 12 | Cylinder compression insufficient | Move on to Step 11 |
| 11 | CHECK ON CAUSE OF INSUFFICIENT COMPRESSION | All OK | Problems encountered | Operation |
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| R/R head for valve leakage test Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET Check condition of cylinders/piston rings | Move on to Step 12 | Valve seal insufficient | Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL |
| Cylinders/piston rings worn | Restore the seal |
| Cylinder head/cylinder block-crankcase matching faulty | Restore correct matching |
| 12 | TIMING CHECK | All OK | Problems encountered | Operation |
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| Check that the valve gear timing is correct Op. 0510A20 TIMING GEAR WITH BELT DRIVE - CHECK - CARRY OUT OPERATION WITH CAM COVER(S) REMOVED AND TAPPETS ADJUSTED AND CRANKSHAFT PULLEY DETACHED (IF NECESSARY) | Move on to Step 13 | Valve gear timing not correct | Restore the correct valve gear timing |
| 13 | CHECK ON CORRECT OPERATION | All OK | Problems encountered | Operation |
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| Check the fault has disappeared | End of diagnosis | The fault persists | Contact the Technical Expert for further information on the problem |