Engine coolant temperature gauge not working

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
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

1.2 8v, 1.3 Multijet, 1.4 16v

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

N.B: the engine temperature signal and the engine failure temperature sensor are made available by the engine management node to the C-CAN; the body computer node makes the message available, via the gateway, at the B-CAN and therefore to the instrument panel.

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	ENGINE TEMPERATURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working properly	Move on to Step 3	Sensor defective	Replace the temperature sensor Op. 1060G14 ENGINE COOLANT TEMPERATURE SENSOR - R.R.
2	ENGINE TEMPERATURE SENSOR CHECK	All OK	Problems encountered	Operation
	Check that the engine temperature sensor is working properly	Move on to Step 3	Sensor defective	Replace the temperature sensor Op. 1056B50
3	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Keeping the Examiner equipment connected to the diagnostic socket, check the operation of the bar graph indicating the temperature in the instrument panel in active diagnosis	Move on to Step 4	The bar graph does not move	Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the connection between the engine coolant temperature sensor and the engine management control unit See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 5	Cables broken/not insulated	Restore cable continuity/insulation
5	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R

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Parts & tools for this job For 2007 Fiat 500

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