2888396 - K26 ENGINE COOLANT OVERHEATING WARNING LIGHT NOT WORKING

With the ignition turned ON, the engine coolant temperature warning light does not come on when the engine is very hot.

		Results of the tests
1	CHECK HIGH TEMPERATURE SWITCH/SIGNAL	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socketCarry out active diagnosis of the maximum engine coolant temperature warning light (through the engine management control unit)	Continue to Step 2	Signal not present	Continue to Step 2
			Connections broken	Restore connection between switch and instrument See   E5030  PETROL ENGINE ELECTRONIC MANAGEMENT
2	CHECK TEMPERATURE SENSOR	All OK	Problems met	Operation
	Check the engine temperature sender unit See Test   1056C  Checking engine coolant temperature sensor operation	Continue to Step 3	Sensor faulty	Replace the sensor Op.   1056B50
3	CHECK INSTRUMENT	All OK	Problems met	Operation
	Check the condition of the high engine coolant temperature warning light, located in the instrument see DESCRIPTION AND OPERATION: 5560 INSTRUMENT PANEL The warning lights consist of LEDs built into the electronic circuit, and so CANNOT be replaced.	Continue to Step 4	Instrument not working	Change the instrument Op.   5560B10
4	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'