D03 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION) - Lancia - MUSA - eLearn

184000414 - D03 ENGINE NOT RUNNING SMOOTHLY / (IRREGULAR OPERATION)

During driving, the engine misses and loses performance

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check, in order: the condition of the air intake circuit that there are no faults in the air filter whether the diesel pipes are leaking that there is no water, petrol, paraffin or dirt in the fuel tank and filter that the battery earth is correctly fixed that there no obstructions in the exhaust system	Continue to Step 1	Fault in air intake circuit	Repair the air intake circuit
			Air filter blocked	Replace the filter element
			Leak from diesel pipes	Eliminate the leaks
			Presence of water, petrol, parffin or dirt detected.	Clean the tank and pipes and replace the filter element
			Loose battery earth terminal	Restore the correct fixing of the earth cable
			Obstruction in the exhaust system	Replace the damaged system component
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket check for errors in the control unit plausibility of all the parameters	Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
		Continue to Step 2	unreliable parameters	Continue following the instructions for the diagnostic equipment
2	CHECK FLOW METER	All OK	Problems met	Operation
	Check the condition of the flow meter and the pipes connected to it	Continue to Step 3	Pipes damaged	Repair the pipe; if necessary replace it
3	EGR SOLENOID VALVE CHECK	All OK	Problems met	Operation
	Check it is working properly. without sticking or intermediate stops. for the solenoid valve.(This can be done by removing the valve from its position and releasing it from the pipes, leaving the electrical connection, however, in place; at this point, operate the active diagnosis stage using the EXAMINER to check that it is working properly)	Continue to Step 4	Solenoid valve damaged	Repair the solenoid valve and, if necessary, replace it Op. 1080C24 .
4	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Connect the diagnostic equipment to the diagnostic socket.Check as described in the test See Test 1060D Check high pressure fuel circuit that the diesel pressure parameter is correct.	Continue to Step 12	Pressure too high	Continue to Step 5
		Continue to Step 12	Pressure too low	Replace the pressure regulator Op. 1060E50 then continueContinue to Step 5
5	CHECK ON RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check as described in the test See Test 1060A Low return fuel pressure circuit check that the pressure in the return pipe to the tank is under 1 bar	Continue to Step 6	Pressure above maximum limit: return pipe to tank blocked	Repair the pipe; if necessary replace it.
6	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check as described in the See Test 1060B Low fuel pressure supply circuit check that the diesel pressure between the filter and pressure pump is between 2 and 3 bar	Continue to Step 12	Pressure below minimum limit or above maximum limit	Continue to Step 7
7	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Close the return pipe downstream of the low pressure regulator valve, located in the fuel filter cover, using the special tool and carry out the test See Test 1060B Low fuel pressure supply circuit check again with the pipe closed, checking that the filter outlet pressure remains below 2 bar.	Continue to Step 8	Pressure rises to 5 bar: blocked pressure regulation valve on filter support	Replace the diesel filter cover
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Continue to Step 9	Difference in pressure greater than 1 bar	Replace the diesel filter cartridge
9	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check that the supply pump pressure at the filter inlet is over 2.2 bar	Continue to Step 12	Pressure below 2 bar	Continue to Step 10
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Measure the difference in pressure between electric pump outlet and filter inlet, checking that it is less than 0.3 bar	Continue to Step 11	Difference in pressure greater than 0.3 bar	Replace the pipe
11	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check as described in the test See Test 1040AA Check supply voltage' and absorption current' that the pump's supply voltage is 12V and that the absorbed current is between 2 and 10 amps.	Continue to Step 12	Voltage < 12 V	Check electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
			Current > 10 Amp: pump defective	Replace the fuel pump assembly Op. 1040A70
			Current < 2 Amp.: pump blocked	Replace the fuel pump assembly Op. 1040A70 and clean the fuel tank
12	ROAD TEST WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Road test the vehicle, reproducing the conditions in which the fault arises, keeping the diagnostic equipment connected. Check: for errors in the control unit; plausibility of all the parameters	Continue to Step 13	Error detected in control units	Continue following the instructions for the diagnostic equipment
			Unreliable parameters	Continue following the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector.
13	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace control unit Op. 1060G80