0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the engine management warning light does not come on with the engine started	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 to the diagnostic socket. Check for faults in the Engine Management 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	ACTION
	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 come on	Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R
3	ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the continuity/insulation of the cable between the engine coolant temperature sensor, engine control unit, Body Computer and instrument panel See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 4	Cables interrupted/not insulated	Restore cable continuity/insulation.
4	CORRECT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

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.