Engine coolant overheating signalled by the instrument / with visible vapour venting

Make: Fiat
Model: Doblò Factory Service Manual
Year: 2000–2010
Section: Engine › Engine coolant overheating signalled by the instrument / with visible vapour venting

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Fault diagnosisEngine coolant overheating signalled by the instrument / with visible vapour venting

ENGINE COOLANT OVERHEATING SIGNALLED BY THE INSTRUMENT / WITH VISIBLE VAPOUR VENTING

1	CHECKING RADIATOR	All OK	Problems met	Operation
		Results of the tests
	Check the condition of the radiator In particular: it should not show signs of distortion or faults; it should not be dirty	Continue to Step 2	Radiator deformed	Replace the radiator Op. 1088B20
		Continue to Step 2	Radiator dirty	Clean the radiator
1.2 8v 1.9 DIESEL Climatizzatore	Check the condition of the radiator In particular: it should not show signs of distortion or faults; it should not be dirty	Continue to Step 2	Radiator deformed	Replace the radiator Op. 1088B24
1.2 8v 1.9 DIESEL Climatizzatore		Continue to Step 2	Radiator dirty	Clean the radiator
2	CHECK ON CAP SEAL	All OK	Problems met	Operation
	Check the radiator cap for leaks	Continue to Step 3	Cap faulty	Replace the radiator cap Op. 0010T21
3	CHECKING COOLANT LEVEL	All OK	Problems met	Operation
	Check the level of the coolant Op. 0010T21 Find out from the customer whether the problem has occurred previously	Continue to Step 4	Level too low	Restore the correct coolant level (see Op. 0010T21). If the fault has already occurred previously, Continue to Step 9
4	CHECKING THERMOSTAT OPERATION	All OK	Problems met	Operation
	Check that the thermostat is working properly	Continue to Step 5	Thermostat not working	Bleed the cooling system. If the problem persists, replace the thermostat Op. 1088C30
5	ACTIVE DIAGNOSIS OF FAN	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Carry out active diagnosis of fan	Continue to Step 6	Fan not working	Continue to Step 7
6	WATER PUMP CHECK	All OK	Problems met	Operation
	Check that the water pump is working properly	Continue to Step 13	Pump faulty	Restore the correct operation of the pump If necessary, replace it Op. 1088C10
1.2 8v 1.9 DIESEL Climatizzatore	Check that the water pump is working properly	Continue to Step 13	Pump faulty	Restore the correct operation of the pump If necessary, replace it Op. 1088C12
7	FAN OPERATION CHECK	All OK	Problems met	Operation
	Supply the fan directly and check its operation See E5020 ENGINE COOLING	Continue to Step 8	Fan not working	Replace fan Op. 1088E10
8	CHECK ON ENGINE COOLING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
1.2 8v	Check that the line between engine management control unit and the fan is working properly See E5020 ENGINE COOLING	Continue to Step 13	Control unit faulty	Print the parameters read by the control unit, then replace it Op. 1056B82
1.2 8v		Continue to Step 13	Connections not correct	Restore connections See E5020 ENGINE COOLING
1.9 DIESEL	Check that the line between engine management control unit and the fan is working properly See E5020 ENGINE COOLING	Continue to Step 13	Control unit faulty	Print the parameters read by the control unit, then replace it Op. 1060D80
1.9 DIESEL		Continue to Step 13	Connections not correct	Restore connections See E5020 ENGINE COOLING
9	COOLING SYSTEM LEAKAGE TEST	All OK	Problems met	Operation
	Carry out the cooling system leak test Op. 0510C30	Continue to Step 10	Coolant leaks discovered	See table X10 ENGINE COOLANT LEAKS
10	CHECKING THAT THERE IS NO GURGLING	All OK	Problems met	Operation
	Check that there is no gurgling/oil in the coolant reservoir	Continue to Step 11	Fluid or bubbles: head gasket damaged	Replace the gasket Op. 1016C10
1.2 8v Climatizzatore	Check that there is no gurgling/oil in the coolant reservoir	Continue to Step 11	Fluid or bubbles: head gasket damaged	Replace the gasket Op. 1016C11
11		All OK	Problems met	Operation
	Check the hydraulic seal of the cylinder head	Continue to Step 12	Seal insufficient	Replace the cylinder head Op. 1016C10
12	MONOBLOC HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the block	Continue to Step 13	Seal insufficient	Replace engine block Op. 1012A10
13	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check: the coolant level that there are no leaks that there is no engine oil in the expansion tank that the cooling radiator is not distorted or faulty that the radiator is not dirty / blocked	Continue to Step 1	Level not correct	Top up level
			Leaks detected	Move on to the step concerned
			Presence of engine oil	Replace the cylinder head gasket
			Radiator deformed	Replace the radiator
			Radiator dirty/blocked	Clean/wash the radiator Op. 0010T22
1	CHECK ON CAP SEAL	All OK	Problems met	Operation
	Check the seal of the expansion tank cap	Continue to Step 2	Cap faulty	Replace the cap
2	CHECKING 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 errors memorized Carry out active diagnosis of fan Check the fan operating cycle	Continue to Step 5	There are errors in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 5	Operation inconsistent	Continue to Step 3
3	CHECK ON ENGINE COOLING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check that the fan control/power line is working properly See E5020 ENGINE COOLING	Continue to Step 4	Connections not correct	Restore connections See E5020 ENGINE COOLING
4	FAN OPERATION CHECK	All OK	Problems met	Operation
	Supply the fan directly and check its operation See E5020 ENGINE COOLING	Continue to Step 5	Fan not working	Replace fan Op. 1088E11
5	CHECKING THERMOSTAT OPERATION	All OK	Problems met	Operation
	Bleed the cooling system. Check that the thermostat is working properly	Continue to Step 6	Thermostat not working	Replace the thermostat Op. 1088C30
6	WATER PUMP CHECK	All OK	Problems met	Operation
	Check that the water pump is working properly	Continue to Step 7	Pump faulty	Replace the pump Op. 1088C10
7	COOLING SYSTEM LEAKAGE TEST	All OK	Problems met	Operation
	Carry out the cooling system leak test Op. 0510C30	Continue to Step 10	No seal with visible leaks	Eliminate the leaks
	Carry out the cooling system leak test Op. 0510C30	Continue to Step 10	No seal without visible leaks	Continue to Step 8
8	CYLINDER HEAD HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the cylinder head Op. 1016E04	Continue to Step 9	Seal insufficient	Renew the seal, if necessary replace the head
9	MONOBLOC HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the block	Continue to Step 10	Seal insufficient	Renew the seal, if necessary replace the engine block
10	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check: the coolant level that there are no leaks that there is no engine oil in the expansion tank that the cooling radiator is not distorted or faulty that the radiator is not dirty / blocked	Continue to Step 1	Level not correct	Top up level
			Leaks detected	Move on to the step concerned
			Engine oil present	Replace the cylinder head gasket
			Radiator deformed	Replace the radiator
			Radiatoar dirty/blocked	Clean/wash the radiator Op. 0010T22
1	CHECK ON CAP SEAL	All OK	Problems met	Operation
	Check the seal of the expansion tank cap	Continue to Step 2	Cap faulty	Replace the cap
2	CHECKING 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 errors memorized Carry out active diagnosis of fan Check the fan operating cycle	Continue to Step 5	There are errors in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 5	Operation inconsistent	Continue to Step 3
3	CHECK ON ENGINE COOLING ELECTRICAL CIRCUIT	All OK	Problems met	Operation
	Check that the fan control/power line is working properly See E5020 ENGINE COOLING	Continue to Step 4	Connections not correct	Restore connections See E5020 ENGINE COOLING
4	FAN OPERATION CHECK	All OK	Problems met	Operation
	Supply the fan directly and check its operation See E5020 ENGINE COOLING	Continue to Step 5	Fan not working	Replace fan Op. 1088E11
5	CHECKING THERMOSTAT OPERATION	All OK	Problems met	Operation
	Bleed the cooling system. Check that the thermostat is working properly	Continue to Step 6	Thermostat not working	Replace the thermostat Op. 1088C30
6	WATER PUMP CHECK	All OK	Problems met	Operation
	Check that the water pump is working properly	Continue to Step 7	Pump faulty	Replace the pump Op. 1088C10
7	COOLING SYSTEM LEAKAGE TEST	All OK	Problems met	Operation
	Carry out the cooling system leak test Op. 0510C30	Continue to Step 10	No seal with visible leaks	Eliminate the leaks
	Carry out the cooling system leak test Op. 0510C30	Continue to Step 10	No seal without visible leaks	Continue to Step 8
8	CYLINDER HEAD HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the cylinder headOp. 1016E04	Continue to Step 9	Seal insufficient	Renew the seal, if necessary replace the head
9	MONOBLOC HYDRAULIC SEAL CHECK	All OK	Problems met	Operation
	Check the hydraulic seal of the block	Continue to Step 10	Seal insufficient	Renew the seal, if necessary replace the engine block
10	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists

‹ Prev Low engine oil pressure Next › Engine coolant overheating signalled by the instrument / without visible vapour venting

Parts & tools for this job For 2000 Fiat Doblò

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