		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	First, check: - condition of the air intake circuit - Correct earth connection of the coils and the engine control unit at the engine block See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT - Leads properly connected to battery	Go to Step 1	Air intake circuit faulty	Restore the seal of the air intake circuit
			Engine control unit earth connection at the engine block is defective	Restore the correct earth connection
			Cables at the battery slack	Restore correct tightening
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check: - that there are 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
		Go to Step 2	Parameter not consistent	Continue following the instructions on the diagnostic equipment
2	SHUT OFF BYPASS AIR SOLENOID CHECK	All OK	Problems encountered	Operation
	Check that the solenoid valve is working properly by carrying out the See Test 1064BH CHECK ON OPERATION OF SUPERCHARGING AIR BY-PASS SOLENOID VALVE (SHUT OFF)	Go to Step 3	Solenoid stuck open	Replace the by-pass solenoid Op. 1048B58 TURBOCHARGER AIR BY-PASS VALVE - R.R.
			Wiring from engine control unit to solenoid defective	Restore correct wiring
			Signal from engine control unit not correct	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R
3	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Carry out a road test, reproducing the conditions in which the fault occurs. Check the fuel supply pressure by performing the See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK	Go to Step 4	Pressure not correct: obstructions in the fuel supply pipe	Remove the obstructions in the fuel pipe, replace it if necessary
			Pressure not correct: tank not sufficiently ventilated	Restore correct tank ventilation
			Pressure not correct: petrol pump damaged	Replace the petrol pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4	AIR TEMPERATURE/PRESSURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the pressure sensor is working properly by carrying out the See Test 1056BU CHECK ON OPERATION OF PRESSURE SENSOR AND/OR INTAKE AIR TEMPERATURE SENSOR Check the continuity/insulation of the wiring between the sensor and the engine management control unit	Go to Step 5	Wiring between sensor and engine control unit with short circuit or open circuit	Restore correct wiring.
		Go to Step 5	Sensor defective	Replace the sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R.
5	TURBOCHARGING PRESSURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the pressure sensor is working properly by carrying out the See Test 1064BA TURBOCHARGING PRESSURE CHECK Check the continuity/insulation of the wiring between the sensor and the engine management control unit	Go to Step 6	Wiring between sensor and engine control unit with short circuit or open circuit	Restore correct wiring.
		Go to Step 6	Sensor defective	Replace the pressure sensor Op. 1056B44 AIR PRESSURE SENSOR - R + R
6	CANISTER SOLENOID CHECK	All OK	Problems encountered	Operation
	With Examiner in active diagnosis, check that the canister solenoid valve is working properly Check continuity of wiring between engine control unit and canister solenoid See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Go to Step 7	Canister solenoid defective	Replace canister solenoid Op. 1080E28 PIPE FROM ACTIVE CHARCOAL FILTER TO SOLENOID - R.R.
		Go to Step 7	Wiring interrupted	Restore correct wiring
7	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

There is a prolonged drop in performance during acceleration