2004 COROLLA (EWD533U)
187
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.
P2 Pressure SW
3–2 : Open below approx. 12.5 kgf/cm
2
(178 psi, 1225 kpa)
Close above approx. 15.5 kgf/cm
2
(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
System Outline
Service Hints
Содержание COROLLA2004
Страница 20: ...2004 COROLLA EWD533U 20 F RELAY LOCATIONS Engine Compartment Body ...
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Страница 214: ...M OVERALL ELECTRICAL WIRING DIAGRAM 2004 COROLLA EWD533U 214 ...