22 · Diagnostics

Engine coolant temperature gauge not working

Make: Lancia
Model: Ypsilon Factory Service Manual
Year: 2003–2011
Section: Instrument panel › Engine coolant temperature gauge not working

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Fault diagnosisEngine coolant temperature gauge not working

ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING

With the ignition ON, the engine coolant temperature gauge in the instrument panel is not working;

the engine temperature signal and the engine temperature sensor failure signal is made available by the 'engine management node' at the C-CAN network; the 'body computer node' makes the message available through the gateway at the B-CAN network and then at the instrument panel.

0	PRELIMINARY CHECK	All OK	Problems met	Operation
		Results of the tests
	Check that the engine management warning light is not lit up with the engine started	Continue to Step 3	Warning light on	Continue to Step 1
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner to the diagnostic socket Check that there are no faults at the Engine Management Node	Continue to Step 2	Presence of faults	Continue following the instructions for the diagnostic equipment
2	ENGINE MANAGEMENT FAULTS CHECK	All OK	Problems met	Operation
	The panel signals errors that the engine management control unit does not see: continue as instructed See table K101 M.I.L WARNING LIGHT STAYS ON	End of diagnosis
3	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Keeping the Examiner connected to the diagnostic socket, check the operation of the pointer in the instrument panel through active diagnosis	Continue to Step 4	The pointer does not move	Replace instrument panel Op. 5560B11
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
1.2 8v 1.2 16v 1.4 16v	Check the continuity of the cable between the engine coolant temperature sensor, engine management control unit, Body Computer and instrument panel See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 5	Cables broken/not insulated	Restore the cable continuity/insulation See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
1.2 16v	Check the continuity/insulation of the cable between the engine coolant temperature sensor, engine management control unit, Body Computer and instrument panel See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 5	Cables broken/not insulated	Restore the cable continuity/insulation See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
5	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the Body Computer Op. 5505A32

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