Engine coolant overheating warning light not working

Make: Fiat
Model: Croma Factory Service Manual
Year: 2005–2010
Section: Instrument panel › Engine coolant overheating warning light not working

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Fault diagnosisEngine coolant overheating warning light not working

ENGINE COOLANT OVERHEATING WARNING LIGHT NOT WORKING

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

the engine temperature and the engine temperature sensor faulty signal is made available by the "engine management node" via the C-CAN; the "body computer node" makes the message available on the B-CAN via the gateway and then to the instrument panel.

0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the engine management warning light is not on with the engine started up	Move on to Step 2	Warning light on	Move on to Step 1
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner equipment to the diagnostic socket. Check that there are no faults in the Engine Management Node	Move on to Step 2	Presence of faults	Continue as described by the diagnostic equipment
2	ENGINE MANAGEMENT FAILURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	The panel signals errors that the engine management control unit does not see: proceed as instructed See table K101 MIL WARNING LIGHT STAYS ON (ENGINE STARTS)	End of diagnosis
3	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the Examiner equipment connected to the diagnostic socket, check the operation of the warning light in active diagnosis	Move on to Step 4	The warning light does not come on	Replace instrument panel Op. 5560B10 CONTROL PANEL - R+R
4	ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the continuity/insulation of the cable between the engine coolant temperature sensor, the engine management control unit, the Body Computer and the instrument panel See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 5	Cables broken/not insulated	Restore the continuity/insulation of the cable.
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

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Parts & tools for this job For 2005 Fiat Croma

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