Engine coolant overheating warning light not working

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Instrument panel › Engine coolant overheating warning light not working

Fault diagnosisEngine coolant overheating warning light not working

ENGINE COOLANT OVERHEATING WARNING LIGHT NOT WORKING

1.2 8v, 1.3 Multijet, 1.4 16v

With the ignition on, the engine coolant temperature warning light in the instrument panel is not working;

N.B: the faulty engine temperature signal is made available from the engine management node to the C-CAN;

the body computer node makes the message available to the B-CAN and therefore to the instrument panel via the gateway

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
		Test results
	Connect the Examiner diagnostic equipment to the diagnostic socket. Check for faults in the Engine Control Node	Move on to Step 2	Presence of faults	Continue as instructed by the diagnostic equipment
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the Examiner diagnostic equipment connected to the diagnostic socket, check the operation of the warning light through active diagnosis	Move on to Step 3	The warning light does not flash.	Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R
3	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the wiring between the engine coolant temperature sensor and the engine management control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 4	Cables broken/not insulated	Restore cable continuity/insulation
4	ENGINE TEMPERATURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working properly	End of diagnosis	Sensor defective	Replace the temperature sensor Op. 1056B50
4	ENGINE TEMPERATURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working properly	End of diagnosis	Sensor defective	Replace the temperature sensor Op. 1060G14 ENGINE COOLANT TEMPERATURE SENSOR - R.R.

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