B12 ENGINE STARTS WITH DIFFICULTY' / WHEN COLD - Fiat - MULTIPLA - eLearn

2888323 - B12 ENGINE STARTS WITH DIFFICULTY' / WHEN COLD

When the outside temperature is low, the engine does not start when cold, or it starts with difficulty and only after repeated attempts. When the key is turned the instruments light up, the starter motor turns, but the engine does not start

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check that the battery voltage is correct and that it is working properly Then check: the state of the spark plugs and leads the condition of the air intake circuit	Continue to Step 1	Battery discharged	Charge or replace the battery
			Spark plugs dirty or damaged	Clean or replace the spark plugs Op. 5510D10
			Spark plug leads damaged	Replace the spark plug leads Op. 5510D14
			Air intake 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 faults in the engine management control unit plausibility of all the parameters	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	CHECK ON FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply circuit is free of air and leaks: Op. 0510C10	Continue to Step 3	Pressure not correct	Replace the fuel pump assembly Op. 1040A70
3	CHECK ON CYLINDER COMPRESSION	All OK	Problems met	Operation
	Carry out the cylinder compression test Op. 0510A10 .	Continue to Step 4	Compression values not correct	Restore the correct cylinder compression, e.g. by checking the seal of the injectors Op. 1056B70 and the cylinders
4	CHECK ON INJECTORS	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other iinstruments) carry out the active diagnosis of the iinjectors.	Continue to Step 5	Injector connections faulty	Restore the connection of the injectors with the control unit, ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT )
		Continue to Step 5	Injectors faulty	Replace the injectors Op. 1056B70
5	CHECK ON 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'