REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 323 (1985 release)

general info. full specifications. diagnostics. hints. tips. tricks

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Mazda
	323
		Introduction
		Gasoline engines
		Engine oil
		Engine cooling system
			Coolant circuit
			The antifreeze concentrate
			Substitution coolant
			Checking the tightness of the cooling system
			Removal and installation / check thermostat
			Removal and installation of the water pump
			Removing and installing radiator
			Removal and installation of the fan motor
			Checking the thermal switch
		Ignition system
		The power supply system, the carburettor, fuel injection system
		Diesel engine
		Exhaust
		Coupling
		Manual gearbox
		Automatic Transmission
		Suspension and steering system
		Brakes
		Wheels and tires, a body, car coloring, care of the car
		Electrical system
		Heater, illumination system, devices
		Controls and operation receptions
		Electrical diagrams

Checking the thermal switch

PERFORMANCE ORDER

Switch screwed into the coolant inlet fitting. It comprises an electric fan of the radiator when the coolant reaches a certain temperature. The switch should be checked if the hot radiator fan is not included. Conditions: Check the scheme electrical wiring, relays and the fan motor. Thermostat and pressure reducing valve in the radiator cap intact. If these elements are faulty, the thermal switch will not turn on the fan, as it is not heated by the cooling fluid.

From the openings on the inlet nipple will leak coolant. Place a container to collect the liquid.

Hang the thermal switch in a container of water. Slowly heat the water.
Use an ohmmeter to control the current flow through the switch. At + 91 ?� C the current must flow.
Leave to cool, and water controlled to a temperature of water at + 84 ?� C, the current flow has stopped.

Secure the switch with a new gasket with a force of 10 Nm.
Adding coolant.
Warm up the engine and run at idle until the fan turns on. Once again, check the coolant level.