2001 TOYOTA PRIUS Service Repair Manual

2001 PRIUS (EWD414U)
The radiator fan motor and A/C condenser fan motor operates according to the water temp. SW (Inverter), A/C single
pressure SW, and the A/C system condition. The FAN NO.1 relay, FAN NO.2 relay, FAN NO.3 relay are turned on/off, to
operate the fan motors at low speed (In series), or high speed (In parallel).
1. LOW SPEED OPERATION
When the water temp. SW (Inverter) is on, the radiator fan motor and A/C condenser fan motor operates at low speed.
2. HIGH SPEED OPERATION
When the water temp. SW (Inverter) is on, if the A/C system is operating A/C single pressure SW is on, the radiator fan motor
and A/C condenser fan motor operates at high speed.
A3 A/C SINGLE PRESSURE SW
3±2 : Close above approx. 15.2 kgf/cm2 (220 psi, 1520 kpa)
Open below approx. 12.3 kgf/cm2 (178 psi, 1230 kpa)
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A134J137R135
A334J737W435
A836J27A37
E736J28B37
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A27Engine Wire and Engine Room J/B (Engine Compartment Left)
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1K27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE142Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IE42Cowl Side Panel LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E540Engine Room Main Wire
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
AIR CONDITIONING
50A
HTR FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
23 415
1K 81J13 1A51F3 32 51
1F 4
A A A A
B A
2 1
3 3
25 13
33
1 2
IE4
1 1K 3
IE1 8
IE113
E 5
L
L±R
W±B W± BL±R
W±BV R B±L LG±RL±O
R
R
B±R
L±O
B±L
LG±R
R
W±B B±W
B±R
VB±R
L±Y L±YW±B
W±B
W±B W±B
12 3B
AAAA
A A 4BB
BLOWER MOTOR
LINEAR CONTROLLER B 7
JUNCTION
CONNECTOR J 7 JUNCTION
CONNECTOR J 6
BLOWER
MOTOR B 6
WAT ER PU MP
MOTOR (
A/C) W 2
JUNCTION
CONNECTOR J 1
A/C DUAL PRESSURE SW A 3JUNCTION
CONNECTORB J 2 A , J 3
2
HTR
RELAYCLR MG
RELAY
W±B
LG±R
RA/C W/P
RELAY 1
GNDSI +B VMM
M

2001 PRIUS (EWD414U)
1 2A E
B AB 2 B 3 B 11 A 3
IE1 20 IE1 15 B 10 A1A8
21 IE1 B AA CAC10A
HTR FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2D 37. 5A
ECU±B
2C 5
IK1 4IK15 IE1 4IE15 B 9B18 A7
B A
A A
2D 8
2K 8
ID B 12 1
1 2
C 2 C 1 C 3 C 4 L±O
LG±R
B±L
R
V
L±Y
L±R
W± BW WL±O
R
R
R±G R±GR LG±R
R±W
W
W
W
W V
L±Y
L±R
W±L
BR±W
V±Y
W± B W± L
BR±W W±L
BR ±WB±L
V±Y
W± B W±BL±Y
L±RVV
A
2 4 1 A
A/C MAGNETIC CLUTCH
AND LOCK SENSOR A 2 JUNCTION
CONNECTOR J 6
A/C ROOM
TEMP. SENSOR A10
A/C THERMISTOR A12 WATER TEMP. SW W 4
JUNCTION
CONNECTORB J27 A , J28
JUNCTION
CONNECTORB J24 A , J25JUNCTION CONNECTORB J22 A , J23
FROM FAN
NO. 2 RELAY
A/C AMPLIFIERB A 7 , A 8AA 9, C
BLW PSW WP LOCK SGLOCK CF GND MGC IG +B RF TR SGTR TE SGTE
IE1 11
V±Y
W± BA
JUNCTION
CONNECTOR J11
FROM CONVERTER
A 10
Y
IDH A F
A F
JUNCTION CONNECTORJ27 A