Purpose, Function
The cooling fan relay operates by receiving the signal from the PCM to supply power to the cooling fan motor.
Construction
The cooling fan relay is installed on the relay and fuse block.

Operation
The contact point is on when the battery voltage is supplied to the coil based on the signal from the PCM, and the battery voltage is supplied to the cooling fan motor.

Fail-safe
Function not equipped.
Water Pump
Thermostat InspectionPassenger Compartment Temperature Sensor Inspection [Full Auto Air Conditioner]
1. Measure the temperature around the passenger compartment temperature sensor
and measure the resistance between passenger compartment temperature sensor terminals
A and B.
If the characteristics of the passenger compartment temperature sensor are
not as shown in the graph, replace t ...
Heated Oxygen Sensor (HO2 S)
Purpose/Function
Detects the oxygen concentration (theoretical air/fuel ratio) in the exhaust
gas as basic information for mainly determining the fuel injection amount and
as information for determining the deterioration of catalytic converter.
Detects the oxygen concentration ( ...
Engine Coolant Level Inspection
WARNING:
Never remove the cooling system cap or loosen the radiator drain plug while
the engine is running, or when the engine and radiator are hot. Scalding engine
coolant and steam may shoot out and cause serious injury. It may also damage
the engine and cooling system.
Tu ...