Workshop Manuals Factory service & repair

Fiat Multipla Factory Service Manual (1998-2010)22 · Fault diagnosis

22 · Diagnostics

High co emissions

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Emissions › High co emissions

‹ Prev Rear door water penetration Next › CO EMISSIONS LOW, NOx EMISSIONS HIGH

Fault diagnosisHigh co emissions

HIGH CO EMISSIONS

1.6 16v

The percentage of CO and/or HC is higher than the recommended figure.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check the condition of the air filter Check the condition and seal of the air supply circuit	Continue to Step 1	Circuit component damaged	Replace the filter element Op. 1048A14
		Continue to Step 1	Circuit component damaged	Replace the component (see Assembly 1048A)
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no fault in the engine management control unit	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	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).
2	ACTIVE DIAGNOSIS WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of: vapour recovery solenoid valve electro-injector	Continue to Step 3	Connections faulty	Restore the connection for the solenoid valve and the injectors with the control unit ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT).
			Solenoid valve faulty	Replace the vapour recovery soleniod valve Op. 1080E28
			Injectors faulty	Replace the injectors Op. 1056B70
3	LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Check that the Lambda sensor is working properly	Continue to Step 4	Lambda sensor not working properly	Replace the Lambda sensor Op. 1080B60
4	CATALYTIC CONVERTER CHECK	All OK	Problems met	Operation
	Check that the catalytic converter is working properly	Continue to Step 5	Catalytic converter not working properly	Replace the catalytic converter Op. 1080B62
5	FUEL PRESSURE CHECK	All OK	Problems met	Operation
	Check the fuel supply pressure Op. 0510C10	Continue to Step 6	Pressure not correct	Replace the fuel pump assembly Op. 1040A70
6	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'

‹ Prev Rear door water penetration Next › CO EMISSIONS LOW, NOx EMISSIONS HIGH

Parts & tools for this job For 1998 Fiat Multipla

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