2004 Corolla Electrical Diagram -Radiator Fan

Radiator Fan From Power Source System (See Page 48) 1 30A RDI FAN

10A ECU–IG

2 1

13 IC

   W   –    B

B–W

B–W

1

W–R

1

5

1

1

1 FAN NO. 1 Relay

3

3

FAN NO. 2 Relay

4

2

2

5 1

1

1

1

1

1

   G    L    R   –    B

7

   B   –    G    L

IA5

   B   –    G    L

   B   –    W

   W   –    L

2 M

R1 Radiator Fan Motor

   G    L

1

3

7    R   –    W

FAN

   B   –    G    L

6 IA5

6

  e    l   g   n    i    S

2 P2 Pressure SW

CF 2

1

   B   –    W

   B   –    W

E6 Engine Control Module

   B   –    G    L

E4

   B   –    W

EA

186 2004 COROLLA (EWD533U)

   B   –    W

ED

  r   o    t   s   r   i   s   o    t   e   a   R    i    2   d   a  n   a    R   R    F

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 6 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 Speed Operat Operation ion 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 High Spee Speed d Operat Operation ion 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. Service Hints P2 Pressure SW 3–2 : Open below approx. approx. 12.5 12.5 kgf/cm kgf/cm2 (178 psi, 1225 kpa) Close above approx. 15.5 kgf/cm2 (220 psi, 1520 kpa) : Parts Location Code

See Page

Code

See Page

E6

34

R1

33

P2

33

R2

33

Code

See Page

: Relay Blocks Code 1

See Page 22

Relay Blocks (Relay Block Location) Engine Room R/B (Engine Compartment Left)

: Junction Block and Wire Harness Connector Code IC

See Page 25

Junction Bl Block and Wi Wire Ha Harness (Connector Lo Location) Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)

: Connector Joining Wire Harness and Wire Harness Code Code IA5

See Page 40

Joini oinin ng Wire Harne rness and Wire Harne rness (Co (Connec nector Locatio tion) Engine Room Main Wire and Instrument Panel Wire (Left Side of the Instrument Panel Reinforcement)

: Ground Points Code

See Page

Ground Points Location

EA

38

Front Right Fender

ED

38

Front Left Suspension Tower

: Splice Points Code E4

See Page 38

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

Engine Room Main Wire

187 2004 COROLLA (EWD533U)