Camry CE Sedan 4-Door L4-2164cc 2.2L DOHC MFI (1997)
Radiator Cooling Fan Motor: Description and Operation
FAN MOTOR OPERATION
With the ignition SW turned ON, the current through ECU-IG fuse flows to the Fan No.1 Relay (coil side), Fan No.2 Relay (coil side). Furthermore, the
current through the Fan No.1 Relay (coil side) or the Fan No.2 Relay (coil side) flows to TERMINAL 3 of the A/C single pressure SW -->
TERMINAL 2 --> TERMINAL 2 of the Water Temp. SW No.1 --> TERMINAL 1 --> GROUND, causing the Fan No.1 Relay to turn OFF and the
Fan No.2 Relay to turn ON.
1. LOW SPEED OPERATION
When the Ignition SW is turned ON and the A/C system is activated, the A/C Condenser Fan Motor and the Radiator Fan Motor rotates at low
speed.
When the A/C system is activated, the current from MG CLT Relay flows to the Fan No.3 Relay (coil side) --> GROUND, causing the Fan No.3
Relay to turn ON. As a result, the current through the CDS fuse flows to TERMINAL 2 of the A/C Condenser Fan Motor --> TERMINAL 1 -->
TERMINAL 3 of the Fan No.2 Relay --> TERMINAL 5 --> TERMINAL 5 of the Fan No.3 Relay --> TERMINAL 3 --> TERMINAL 2 of
the Radiator Fan Motor --> TERMINAL 1 --> GROUND. As this flowing in series for the Motors, the Motors rotate at low speed.
2. HIGH SPEED OPERATION
Only when the A/C single pressure SW is turned OFF or the water temp. SW No.1 is turned OFF, the A/C Condenser Fan Motor and the Radiator
Fan Motor rotate at high speed.
When the A/C single pressure SW is turned OFF, the current from the RDI fuse flows to the Fan No.1 Relay (point side) --> TERMINAL 2 of
the Radiator Fan Motor --> TERMINAL 1 --> GROUND. At the same time, the current from CDS fuse flows to TERMINAL 2 of the A/C
Condenser Fan Motor --> TERMINAL 1 --> TERMINAL 3 of the Fan No.2 Relay --> TERMINAL 4 --> GROUND.
As the current flowing in parallel for the Motors as above, the Motors rotate at high speed.