System Outline

The current is applied at all times through the RDI FAN fuse to TERMINAL 5 of the FAN No. 1 relay.

When the ignition SW is turned on, the current flows through the ECU-IG fuse to FAN No. 1 relay (Coil side) to TERMINAL CF of the engine control module. At the same time as this current flow, the current from ECU-IG fuse flows to the FAN No. 2 relay (Coil side) to TERMINAL 3 of the pressure SW.

1. Low Speed Operation 

   When the A/C system is operating, the FAN No. 1 Relay is turned on. As a result, the current flows from the RDI FAN fuse to FAN No. 1 relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to TERMINAL 3 of the FAN No. 2 relay to TERMINAL 4 to TERMINAL 2 of the radiator fan resistor to TERMINAL 1 to GROUND, and the radiator fan motor rotates at low speed.

2. High Speed Operation 

   When the pressure SW is on or engine control module operated, the FAN No. 1 and No. 2 relay is turned on. As a result, the current flows from the RDI FAN fuse to FAN No. 1 relay (Point side) to radiator fan motor to TERMINAL 3 of the FAN No. 2 Relay to TERMINAL 5 to GROUND, and the radiator fan motor rotates at high speed.