22 · Diagnostics

Engine starts with difficulty

Make: Lancia
Model: Thesis Factory Service Manual
Year: 2002–2009
Section: Starting › Engine starts with difficulty

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Fault diagnosisEngine starts with difficulty

ENGINE STARTS WITH DIFFICULTY

2.0 TB, 2.4 20V, 3.0 V6

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.0 TB,2.4 20 V	First, check: that there are no obstructions in the air filter; the condition of the air intake circuit	Move on to Step	1. Air intake circuit component damaged	1. Repair or replace the damaged component
2.0 TB,2.4 20 V		Move on to Step	2. Air filter blocked	2. Replace the filter See in Op. 1048A10 COMPLETE AIR FILTER -R.R.
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	First, check: that there are no obstructions in the air filter; the condition of the air intake circuit	Move on to Step	1. Air intake circuit component damaged	1. Repair or replace the damaged component
		Move on to Step	2. Air filter blocked	2. Replace the filter See in Op. 1048A11 Air filter assembly - R.R. for versions with automatic transmission
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step	1. Error detected in the control unit	1. Continue following the instructions in the diagnostic table
		Move on to Step	2. Parameters not plausible	2. Continue following the instructions in the diagnostic table
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out the active diagnosis for the canister solenoid valve	Move on to Step	Solenoid valve faulty	Replace the solenoid valve See in Op. 1080E28 enablement solenoid for flow of fuel vapours to inlet - r+r
3	PETROL VAPOUR RECOVERY SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the seal of the petrol vapour recovery system	Move on to Step	1. Air leaks	1. Pipes connected to the supply broken
	Check the seal of the petrol vapour recovery system	Move on to Step	2. Restore the correct seal	2. Replace the pipes
4	SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fuel pressure is correct See in Op. 0510C10 FUEL SYSTEM - Check DELIVERY PRESSURE	Move on to Step	1. Fuel pressure too low: supply pipe obstructed	1. Eliminate the obstructions, if necessary, replace the pipe
		Move on to Step	2. Fuel pressure too low: pump defective	2. Replace the pump assembly See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R.
5	TIMING CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the valve gear timing is correct [PR.0510A20]	Move on to Step	Valve gear timing not correct	Restore the correct valve gear timing See in Op. 1032B10 TOOTHED timing BELT - R.R. for timing adjustment or replacement
6	CYLINDER COMPRESSION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out the cylinder compression check See in Op. 0510A10 CYLINDER COMPRESSION - Check with spark plugs or injectors removed	Move on to Step	Cylinder compression insufficient	Move on to Step
7	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
2.0 TB,2.4 20 V	R/R head for valve leakage test See in Op. 1016C10 SINGLE CYLINDER HEAD - R.R. and Replace gasket Check condition of cylinders/piston rings	Move on to Step	1. Valve seal insufficient	1. Overhaul the head See in Op. 1016E10 SINGLE CYLINDER HEAD, removed - Overhaul
2.0 TB,2.4 20 V		Move on to Step	2. Cylinders/piston rings worn	2. Restore the seal
7	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	R/R head for valve leakage test See in Op. 1016D24 RIGHT CYLINDER HEAD - REMOVING-REFITTING AND REPLACING GASKET Check condition of cylinders/piston rings	Move on to Step	1. Valve seal insufficient	1. Overhaul the head See in Op. 1016E20 CYLINDER HEADS (one), left or right, removed - Overhaul
		Move on to Step	2. Cylinders/piston rings worn	2. Restore the seal
8	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists control unit defective	Replace the control unit See in Op. 1056B82 Injection/ignition system CONTROL UNIT (one) - R.R.

2.4 JTD 10V

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the following, in order: condition of the air intake circuit; diesel pipe seal; condition of the air filter; absence of fuel, water, paraffin or dirt in the diesel filter.	Move on to Step	1. Fault in the air intake circuit	1. Renew the air intake circuit
			2. Leaks from the diesel pipes	2. Adjust pipe tightness to correct setting and replace if necessary.
			3. Filter blocked	3. Replace the diesel filter cartridge See in Op. 1044B20 fuel filter filtering element - replace
			4. Water, petrol, paraffin or dirt found to be present	4. Clean the tank and pipes and replace the diesel filter cartridge See in Op. 1044B20 fuel filter filtering element - replace
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check: that there are no errors in the control unit; parameter plausibility	Move on to Step	1. Error detected in the control unit	1. Continue following the instructions for the diagnostic equipment
			2. Parameters not plausible	2. Continue following the instructions for the diagnostic equipment
			3. No communication with the control unit	3. Restore the connection between the engine management control unit and the diagnostic connector
2	HIGH PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket.Check, as described in the test < R1 >, that the diesel pressure parameter is correct Continue following the instructions in the test 1060D Injector high pressure fuel circuit check	Move on to Step	1. Pressure not correct	Move on to Step
3	LOW RETURN PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check, as described in the test < R1 >, that the pressure in the return pipe to the tank is less than 1 bar Continue following the instructions in the test 1060A Low pressure fuel return circuit check	Move on to Step	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe, if necessary, replace it
4	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check, as described in < R1 >, that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar Continue following the instructions in the test 1060B Low pressure fuel supply circuit check	Move on to Step	1. Pressure below the minimum limit or above the maximum limit	Move on to Step
5	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Constrict the return pipe from the pressure regulator valve and carry out < R1 > again with the pipe constricted checking that the pressure at the filter outlet remains below 2 bar Continue following the instructions in the test 1060B Low pressure fuel supply circuit check	Move on to Step	1. Pressure rises to 5 bar: pressure regulator valve on filter mounting incorrectly adjusted	1. Replace the valve See in Op. 1044B16 Fuel supply/return adjustment valve on fuel filter - R.R.
6	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Move on to Step	Difference in pressure more than 1 bar	Replace the diesel filter cartridge See in Op. 1044B20 fuel filter filtering element - replace
7	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the supply pump pressure at the filter inlet is more than 2.2 bar	Move on to Step	Pressure below 2 bar	Move on to Step
8	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Measure the difference in pressure between the electrical pump outlet and the filter inlet checking that it is less than 0.3 bar	Move on to Step	1. Difference in pressure more than 0.3 bar	1. Replace the pipe
9	LOW SUPPLY PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check, as described in < R1 >, that the pump supply voltage is equal to 12 volt and that the current absorbed is between 2 and 10 Ampere Continue following the instructions in the test 1040AA Check the supply voltage and the absorption current	Move on to Step	1. Voltage < 12 volt	1. Check electrical wiring (Wiring Diagram ) E5050 DIESEL ENGINE ELECTRONIC MANAGEMENT
			2. Current > 10 Amps: pump defective	2. Replace the fuel pump assembly See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R.
			3. Current < 2 Amps: pump obstructed	3. Replace the fuel pump assembly < R1 > and clean the fuel tank See in Op. 1040A70 SUBMERGED PUMP ASSEMBLY complete with level gauge - R.R.
10	CHECK CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Replace the DRV high pressure valve and check that the fault is no longer present		Fault persists	Move on to Step
11	CHECK CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Replace the high pressure pump and check that the fault is no longer present		Fault persists	Move on to Step
12	CYLINDER COMPRESSION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Carry out the cylinder compression check	Move on to Step	Cylinder compression insufficient	Move on to Step
13	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	R/R head for valve leakage test Check condition of cylinders/piston rings	Move on to Step	1. Valve seal insufficient	1. Overhaul the head See in Op. 1016E10 SINGLE CYLINDER HEAD, removed - Overhaul
		Move on to Step	2. Cylinders/piston rings worn	2. Restore the seal
14	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists control unit defective	Replace the engine management control unit See in Op. 1060G80 Diesel electronic injection system CONTROL UNIT - R.R.

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Parts & tools for this job For 2002 Lancia Thesis

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