First check:

• that the inertia switch has not cut in;
• the state of the spark plugs;
• connections and the state of the spark plug leads;
• absence of obstructions in the catalytic converter

Move onto step 1

• Restore correct operation

End of diagnosis

• Replace the spark plugs Op. 5510D10

End of diagnosis

• Replace the leads

End of diagnosis

• Replace catalytic converter/s

End of diagnosis

Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket

Verify:

• that there are no errors in the control unit
• the plausibiilty of the parameters

Move onto step 2

• Continue following the instructions for the diagnostic equipment

End of diagnosis

• Continue following the instructions for the diagnostic equipment

End of diagnosis

With the ignition ON and the engine switched off, check the fuel supply pressure . Op. 0510C10

Start up the engine and check that the supply pressure does not decrease

Move onto step 4

Move onto step 3

Check the petrol pump supply and earth Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL

Move onto step 4

• Restore connections Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL

End of diagnosis

• Replace petrol pump () Op. 1040A70

End of diagnosis

Check that the fault is no longer present

Incorrect selection of diagnostic procedure

• Replace control unit Op. 1056B82

Incorrect selection of diagnostic procedure