Radiator Cooling Fan Motor: Testing and Inspection
INSPECTIONRadiator Fan Motor and Condenser Fan motor
1. Check to be sure that the radiator fan rotates when battery voltage is applied between the terminals.
2. Check to see that abnormal noises are not produced while the motor is turning.
Cooling fan control system
ECM Controls the cooling fan in 3 steps (LO/ MIDDLE/ HI) according the vehicle speed, the air-conditioning load and engine coolant temperature.
ECM Control logic
Radiator Fan Motor Relay
1. Remove the radiator fan motor relay (Hi and Lo) from the relay box in engine room.
2. Check the continuity the terminals "86" and "85" with an ohmmeter.
3. Apply DC12 V to the terminals "86" and ground the terminal "85".
4. Check for continuity between the terminals "87" and "30".