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Test results |
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First, check: -leaks from the manifold gasket; -leaks from the throttle body; -leaks from the cylinder head. |
Go to Step 1 |
Leaks from the manifold gasket |
Restore the correct gasket. |
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Leaks from the throttle body gasket |
Restore the correct gasket. |
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Leaks from the cylinder head |
Eliminate the leak |
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Connect the diagnosis equipment (Examiner or other instruments) to the diagnosis socket and check: - no faults in the engine management control unit; - parameter plausibility |
Go to Step 2 |
Error detected in the control unit |
Continue following the instructions on the diagnostic equipment |
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Parameter not consistent |
Continue following the instructions on the diagnostic equipment |
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Carry out the active diagnosis for the solenoid |
Go to Step 4 |
Solenoid not working |
Go to Step 3 |
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Check the wiring between the valve and the engine compartment junction unit Check the wiring between the valve and the engine control unit See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT |
Go to Step 4 |
Solenoid faulty |
Replace the solenoid valve Op. 1080E28 PIPE FROM ACTIVE CHARCOAL FILTER TO SOLENOID - R.R. |
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Connections not correct |
Restore the correct connections See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT |
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Inspect the spark plugs and check they are working properly Check that the coils are working by carrying out See Test 5510CI CHECK ON OPERATION OF IGNITION COILS |
Go to Step 5 |
Spark plugs defective |
Replace spark plugs Op. 5510D10 SPARK PLUGS - R+R |
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Coil defective |
Replace coil Op. 5510C14 IGNITION COIL/S - R.R. |
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Check the fuel supply pressure See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK |
Go to Step 6 |
Fuel pressure too low: pipe obstructed |
Eliminate the obstructions; if necessary, replace the pipe |
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Fuel pressure too low: pump defective |
Replace the pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R |
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Check that the engine temperature sensor is working properly by carrying out See Test 1056BC Engine coolant temperature sensor operation check |
Go to Step 7 |
Engine overheating |
Restore the engine cooling system See E5020 ENGINE COOLING |
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Engine temperature sensor defective |
Replace the engine temperature sensor Op. 1056B50 ENGINE COOLANT TEMPERATURE SENSOR - R + R |
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Check that the injectors are working properly by carrying out the See Test 1056BA INJECTOR OPERATION CHECK |
Go to Step 8 |
Injector stuck/incorrectly adjusted |
Replace the injector Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT |
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Connections not correct |
Restore the correct connections See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT |
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Check that the accelerator pedal is working correctly. |
Go to Step 9 |
Accelerator pedal potentiometer defective |
Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
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Connections not correct |
Restore the correct connections See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT |
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Check the condition of the motorized throttle actuator connection Check the condition of the wiring Check that the motorized throttle is working properly, carrying out See Test 1056BW Check on the throttle body actuator operation |
Go to Step 10 |
Connection defective |
Restore correct connection |
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Wiring defective |
Restore the correct wiring. |
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Motorized throttle defective |
Replace the motorized throttle Op. 1056B14 THROTTLE BODY - R + R |
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Check that the cylinder compression is not too low Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED |
Go to Step 11 |
Compression too low |
Overhaul the engine |
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Check that the engine control unit is working properly |
End of diagnosis |
Control unit defective. |
Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |
