22 · Diagnostics

White exhaust fumes

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Emissions › White exhaust fumes

‹ Prev CO EMISSIONS LOW, NOx EMISSIONS HIGH Next › Black exhaust fumes

Fault diagnosisWhite exhaust fumes

WHITE EXHAUST FUMES

There is a large amount of exhaust fumes, with light coloured smoke

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
1.2 8v	Preliminarily check that the fuel tank contains no water or other fluids	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank Op. 1040A10
1.9 DIESEL	Preliminarily check that the fuel tank contains no water or other fluids	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank Op. 1040A10
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
1.2 8v	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket.	Check that there are no faults in the engine management control unit Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
1.2 8v			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
1.9 DIESEL	Connect diagnostic equipment (Examiner or other instruments) to the diagnostic socket.	Check that there are no faults in the engine management control unit Continue to Step 2	An error is detected in the control unit	Continue following the instructions for the diagnostic equipment
1.9 DIESEL			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
1.2 8v	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors.	Continue to Step 3	Injector connections faulty	Restore the connection of the injectors with the control unit See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
1.2 8v		Continue to Step 3	Faulty injector	Replace injector Op. 1056B70
1.2 8v Climatizzatore	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors.	Continue to Step 3	Injector connections faulty	Restore the connection of the injectors with the control unit See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
1.2 8v Climatizzatore		Continue to Step 3	Faulty injector	Replace injector Op. 1056B70
1.9 DIESEL	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors.	Continue to Step 3	Injector connections faulty	Restore the connection of the injectors with the control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
1.9 DIESEL		Continue to Step 3	Faulty injector	Replace injectors Op. 1060B10
3	CHECKING CYLINDER HEAD GASKET	All OK	Problems met	Operation
1.2 8v	Verify: That the cylinder head tightening is correct The gasket seal	Continue to Step 4	Cylinder head tightening not correct	Restore the correct tightening
1.2 8v		Continue to Step 4	Gasket damaged	Replace the gasket Op. 1016C10
1.9 DIESEL	Verify: That the cylinder head tightening is correct The gasket seal	Continue to Step 4	Cylinder head tightening not correct	Restore the correct tightening
1.9 DIESEL		Continue to Step 4	Gasket damaged	Replace the gasket Op. 1016C10
1.2 8v Climatizzatore	Verify: That the cylinder head tightening is correct The gasket seal	Continue to Step 4	Cylinder head tightening not correct	Restore the correct tightening
1.2 8v Climatizzatore		Continue to Step 4	Gasket damaged	Replace the gasket Op. 1016C11
4	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	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	Continue to Step 5	Blow-by circuit faulty	Restore the correct operation of the circuit: if necessary, replace the pipes
5	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists

There is a large amount of exhaust fumes, with light coloured smoke

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check: no water or other fluids in the fuel tank engine oil level	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank
		Continue to Step 1	Level too high	Top up engine oil level
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the engine management control unit: in error mode there are no faults	Check that there are no faults in the engine management control unit Continue to Step 2	Error detected in the control unit	Continue following the instructions for the diagnostic equipment
2	CHECKING BLOW-BY CIRCUIT	All OK	Problems met	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	Continue to Step 3	Fault in the pipe from separator to intake	Restore the correct operation of the circuit: if necessary, replace the pipes
		Continue to Step 3	Fault in separator (rocker cover)	Restore the correct operation of the circuit; if necessary replace the rocker cover
3	CHECKING CYLINDER COMPRESSION	All OK	Problems met	Operation
	Carry out the cylinder compression test	Continue to Step 5	Insufficient cylinder compression	Continue to Step 4
4	CHECKING CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems met	Operation
	Remove-refit the cylinder head: Check the condition of the cylinders/piston rings the seal of the valve oil seals	Continue to Step 5	Wear on cylinders/piston rings outside tolerance	Restore the correct clearances
		Continue to Step 5	Valve oil seals leaking	Replace the oil seals, if necessary, overhaul the head
5	CHECKING SEAL OF TURBOCHARGER GASKETS	All OK	Problems met	Operation
	Check:: for engine oil leaks from turbocharger impeller spindle for excessive turbocharger impeller shaft clearance	Continue to Step 6	for leaks	Replace turbocharger Op. 1064A19
		Continue to Step 6	Excessive clearance present	Replace turbocharger Op. 1064A19
6	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2000 Fiat Doblò

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