Check correct connection and operation of ignition circuit, with particular attention to:

• wiring;
• connectors;
• high tension lead continuity Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL

Move onto step 1

• Restore correct connectionsWiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL Replace faulty components if necessary.

Move onto step 11

Use the Examiner 1806369000 coil to run a visual check on the operation of the coil connected to the affected cylinder.

In particular, check that sparking takes place regularly

Move onto step 2

Move onto step 7

Check that the gap between the affected spark plug electrodes are withiin permitted limits.

Also check that the electrodes are not worn/broken

Move onto step 3

• Replace the spark plug Op. 5510D10

Move onto step 11

Turn the key to MAR and check fuel pump activates.

While the pump is active, check fuel pressure is not too low

Move onto step 4

• Check that the injector is not locked open and that there are no leaks Replace the injector if necessary Op. 1056B70

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Carry out active diagnosis on the affected injector. Check it is not locked shut

Move onto step 5

• Change the injector Op. 1056B70

Move onto step 11

Carry out a compression test on the affected cylinder Op. 0510A10

Move onto step 11

Move onto step 6

Carry out R/R on head to check the valve seal

Check the condition of the cylinders/piston rings

Incorrect selection of diagnostic procedure

• Overhaul the cylinder head Op. 1016E10

Move onto step 11

• Restore the seal

Move onto step 11

See Test 5510C Coil resistance check Check that the resistance of the primary and secondary circuits is within permitted limits for the affected coil

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• Replace the coil Op. 5510C14

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Check insulation is present between the primary and secondary windings of the affected coil

Move onto step 9

• Replace the coil Op. 5510C14

Move onto step 11

Check connection between wiring and connectors and ignition circuit is correct Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL . In particular, check there are not SCs or ACs

If present, check connections between power module and engine control unit

Move onto step 10

• Restore correct connections Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL Replace defective parts if necessary

Move onto step 11

Exchange the effected coil with a coil from another cylinder Op. 5510C14 and use the coil of Examiner 1806369000 to check that sparking is regular

Move onto step 11

• Repair the old coil and replace the engine control unit Op. 1056B82

Move onto step 11

Use a tester to cancel the errors in the control unit

Carry out a road test and check that the error does not recur

Move onto step 12

Move onto step 0

• Contact Technical Service for more information about the problem

End of diagnosis

Check that the fault is no longer present

Incorrect selection of diagnostic procedure

Incorrect selection of diagnostic procedure