X001 EXCESSIVE FUEL CONSUMPTION - Fiat - NUOVA 500 - eLearn

312000201 - X001 EXCESSIVE FUEL CONSUMPTION

The engine operates in a way that appears normal, but the fuel consumption is higher than that recorded in the past. The consumption data recorded in the vehicle technical documentation is defined during the course of approval tests in accordance with directive 93/100/CE.These tests simulate an urban cycle and an average non-urban cycle and therefore may not be representative as fuel consumption depends a great deal on driving styles

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
		Test results
	Check the following:condition of the air filter;condition of the fuel filter.Check the exhaust circuit, paying particular attention to any obstructions in the pipes	Move on to Step 1	1. Filter element dirty or damaged.2. Fuel filter dirty3. Outlets obstructed.4. Exhaust system obstructed.	1. Replace the filter element2. Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE 3. Replace the complete exhaust pipe4. Replace the defective system component.
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the engine management control unit:- in error mode;- that there are no faults;- in parameters mode;- the plausibility of all the parameters.	Move on to Step 2	Error detected in the engine management control unit.	Continue following the instructions given by the diagnostic equipment.
2	HIGH PRESSURE CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the fuel supply circuit, high pressure side, carrying out the See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK	Move on to Step 3	1. Pressure not correct: pressure regulator faulty.2. Pressure not correct: injector manifold faulty.3. Pressure not correct: injectors faulty.4. Pressure not correct: pipe from pump to manifold faulty.5. Pressure not correct: pipe from manifold to injector faulty	1. Replace the pressure regulator Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R. 2. Replace injector manifold Op. 1060F30 SINGLE FUEL MANIFOLD PIPE - R.R. 3. Replace the injectorsOp. 1060F10 4. Replace the pipe.5. Replace the pipe.
3	LOW PRESSURE CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the fuel supply circuit, low pressure side, carrying out the See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECKand the See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	End of diagnosis	1. Pressure not correct: fuel filter faulty.2. Pressure not correct: electric pump faulty.3. Pressure not correct: return manifold faulty.4. Pressure not correct: fuel return pipe faulty.	1. Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE 2. Replace the electric pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R 3. Replace the manifold Op. 1060F50 FUEL RETURN MANIFOLD - R.R.4. Replace the pipes concerned.