Toyota Corolla 2004 Electrical Wiring Diagram - Radiator F a n
Radiator F a n
From Power Source Sys te m (See Page 48
1
30A
RDI
FAN
2
1
B–W
IC13
B–W
11
51
32
11
)
10A
ECU–IG
FAN
NO. 1
Relay
B–W W–R
11
13
FAN
NO. 2
Relay
25
11
4
1
2
1
B–RW–R
M
R 1
Radiator
Fan Motor
LG–B
IA56
LG–B
IA57
LG LG
7
E 6
Engine Control
Module
LG–B
6
CFFAN
LG–B
3
P 2
Pressure
SW
Single
2
W–B
L–WW–BW–B
2
R 2
Radiator
1
E 4
Fan Resistor
186
W–B W–B
EA ED
2004 COROLLA (EWD533U)
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 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.
Service Hints
P2 Pressure SW
2
3–2 : Open below approx. 12.5 kgf/cm
(178 psi, 1225 kpa)
Close above approx. 15.5 kgf/cm2 (220 psi, 1520 kpa)
: Parts Location
Code See Page Code See Page Code See Page
E6 34 R1 33
P2 33 R2 33
:
Relay Blocks
Code See Page Relay Blocks (Relay Block Location)
1 22 Engine Room R/B (Engine Compartment Left)
:
Junction Block and Wire Harness Connector
Code See Page Junction Block and Wire Harness (Connector Location)
IC 25 Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
:
Connector Joining Wire Harness and Wire Harness
Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA5 40 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 See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E4 38 Engine Room Main Wire
2004 COROLLA (EWD533U)
187
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