22 · Diagnostics

White exhaust fumes

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Emissions › White exhaust fumes

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Fault diagnosisWhite exhaust fumes

WHITE EXHAUST FUMES

1.9 JTD 8v, 1.9 JTD 16v, 2.4 JTD 20v

The customer complains of: Excessive white fumes

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Check that the engine oil level is correct Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly carrying out the See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Check the operation of the low pressure supply circuit by carrying out the See Test 1060OB CHECK ON SUPPLY LOW PRESSURE FUEL CIRCUIT	Move on to Step 1	Oil level incorrect	Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
1	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit. Check the value of the following parameters: . Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK . Engine rpm See Test 1060GI ENGINE SPEED CHECK . Atmospheric pressure See Test 1060GD ATMOSPHERIC PRESSURE CHECK . Engine coolant temperature See Test 1060OE CHECK ON OPERATION OF COOLANT TEMPERATURE SENSOR . Diesel temperature See Test 1060EA DIESEL FUEL TEMPERATURE CHECK	Move on to Step 2
2	PREHEATING RELAY ACTIVE CHECK	All OK	Problems encountered	Operation
	Carry out the active diagnosis for the preheating relay, checking that the result is positive. The check on the following system is only necessary if the outside temperature is below 0 °C.	Move on to Step 4	The result of the active diagnosis is negative	Move on to Step 3
3	HEATER PLUGS CHECK	All OK	Problems encountered	Operation
	Check that the heater plugs are working properly, by carrying out the See Test 5520CA GLOW PLUGS FUNCTIONAL TEST	Move on to Step 4
4	ELECTRICAL EQUIPMENT CHECK	All OK	Problems encountered	Operation
	Check that the fuses F1 (the last one at the bottom of the vertical row) and F20 (the first one on the right of the lower row) have not blown	Move on to Step 6	Fuse F1 has blown	Restore the connections or, if necessary, replace the junction unit in the engine compartment Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
		Move on to Step 6	Fuse F20 has blown	Move on to Step 5
5	TURBOCHARGER SEAL CHECK	All OK	Problems encountered	Operation
	Check the circuit for the protective fuse for the diesel preheating relay, conduct See Test 5505AB CHECK DIESEL PREHEATING RELAY PROTECTIVE FUSE	Move on to Step 6
6	DIESEL PREHEATING RELAY CHECK	All OK	Problems encountered	Operation
	Check the diesel preheating relay circuit, conduct See Test 5505AC CHECK DIESEL PREHEATING RELAY	Move on to Step 7
7	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS	Move on to Step 10	Cylinder compression insufficient	Move on to Step 8
8	CHECK CYLINDER HEAD GASKET AND VALVE OIL SEALS	All OK	Problems encountered	Operation
	Check: - that the cylinder head is correctly tightened; - the seal of the gasket - the seal of the valve oil seals	Move on to Step 9	Cylinder head tightening incorrect	Proceed with the removing-refitting of the cylinder head and renew the correct tightening Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET
			Gasket damaged	Change the head gasket Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET
			Oil seal missing	Replace the valve oil seals Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
9	CHECK THE CAUSE OF THE INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	With the cylinder head removed, check: - valve seal - cylinder/piston ring wear conditions	Move on to Step 10	Valve seal insufficient	Overhaul cylinder head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
		Move on to Step 10	Cylinder/ring wear outside tolerances	Restore correct operating clearance
10	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit, in particular check that there are no obstructions in the separator or in the pipes	Move on to Step 11	Fault in the pipe from separator to intake	Restore circuit to working order: change the pipe if necessary
		Move on to Step 11	Fault in the separator (tappet cover)	Restore circuit to working order: if necessary, replace the tappet cover
11	TURBOCHARGER SEAL CHECK	All OK	Problems encountered	Operation
	Check that there are no engine oil leaks from the turbocharger impeller shaft	End of diagnosis	Gasket seal insufficient	Change the turbocharger Op. 1064A27 TURBOCHARGER UNIT AND EXHAUST MANIFOLD - R.R.

1.8, 2.2

A high level of pale-coloured exhaust fumes is noted

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	First of all, check for water or other fluids in the fuel tank	Move on to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
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	Move on to Step 2	Error detected in the control unit	Continue following the instructions for the diagnostic equipment
		Move on to Step 2	No communication with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) and carry out the active diagnosis of the injectors	Move on to Step 3	Injector connection faulty	Restore the connection for the injectors with the control unit See See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
		Move on to Step 3	Injector fault	Replace the injector Op. Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
3	CYLINDER HEAD GASKET CHECK	All OK	Problems encountered	Operation
	Check: That the cylinder head is correctly tightened; The seal of the gasket	Move on to Step 4	Cylinder head tightening incorrect	Restore correct tightening
		Move on to Step 4	Gasket damaged	Replace the gasket Op. Op. 1016C10 SINGLE CYLINDER HEAD - R.R. AND REPLACE GASKET
4	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit. In particular, check for obstructions in the separator or pipes	Move on to Step 5	Fault in the blow-by circuit	Restore circuit to working order: replace the pipes if necessary
5	CHECK CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom

A high level of pale-coloured exhaust fumes is noted

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	First, check: if there is sevice information on the subject that there is no water or other liquids in the fuel tank	Move on to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
1	CARRY OUT ROAD TEST	All OK	Problems encountered	Operation
	With the engine at operating temperature check after a long deceleration that there is not a considerable deterioration in the problem after subsequent acceleration	Move on to Step 2	Increase in the fumes during acceleration (after deceleration) as a result of oil passing through the piston rings or valve guides	Move on to Step 3
2	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit, in particular check that there are no obstructions in the separator or in the pipes	Move on to Step 3	Fault in the pipe from separator to intake	Restore circuit to working order: change the pipe if necessary
		Move on to Step 3	Fault in the separator	Restore circuit to working order: replace the separator if necessary
3	CHECK THE CAUSE OF THE INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	R.R. cylinder head: Check condition of cylinders/piston rings the seal of the valve oil seals	Move on to Step 4	Cylinder/ring wear outside tolerances	Restore correct operating clearances
		Move on to Step 4	Valve oil seals insufficient	Replace the oil seals, if necessary, overhaul the head
4	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2005 Fiat Croma

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