2001 TOYOTA PRIUS relay

2001 PRIUS (EWD414U)
When the ignition SW is turned ON, the current flows from WIPER fuse to wiper and washer SW TERMINAL 17 and front
wiper motor TERMINAL 2 or the current flows from WASHER fuse to washer motor TERMINAL 2.
1. LO POSITION
When the wiper and washer SW is at LO position, the current flows from wiper and washer SW TERMINAL 17 to TERMINAL
7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and the front wiper motor runs at low speed.
2. HI POSITION
When the wiper and washer SW is at HI position, the current flows from wiper and washer SW TERMINAL 17 to TERMINAL
8 to front wiper motor TERMINAL 3 to TERMINAL 4 to GROUND, and the front wiper motor runs at high speed.
3. INT POSITION
When the wiper and washer SW is at INT position, the wiper relay is activated and the current flows from wiper and washer
SW TERMINAL 17 to TERMINAL 2 to GROUND. This current activates the intermittent circuit, and the current flows from
wiper and washer SW TERMINAL 17 to TERMINAL 7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and
operates the front wipers.
4. WASHER CONTINUOUS OPERATION
When the wiper and washer SW is pulled to WASHER position (Washer SW ON position), the current from the WASHER
fuse flows to washer motor TERMINAL 2 to TERMINAL 1 to wiper and washer SW TERMINAL 11 to TERMINAL 2 to
GROUND, and operates the washer motor to emit a water spray. At the same time, the current flows from the WIP fuse to
wiper and washer SW TERMINAL 17 to TERMINAL 7 to front wiper motor TERMINAL 5 to TERMINAL 4 to GROUND, and
operates the front wiper motor.
C12 FRONT WIPER AND WASHER SW
2±GROUND : Always continuity
7±GROUND : Approx. 12 volts with the front wiper and washer SW at LO position
Approx. 2 to 12 seconds intermittently with the front wiper and washer SW at INT position
8±GROUND : Approx. 12 volts with the front wiper and washer SW at HI position
16±GROUND : Approx. 12 volts with the ignition SW on unless the front wiper motor at STOP position
17±GROUND : Approx. 12 volts the ignition SW at ON or ST position
F9 FRONT WIPER MOTOR
2±1 : Closed unless the wiper motor at STOP position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C1236J737W135
F934J1737
J137J1837
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2I31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
2N31Floor 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)
IA142Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IH142Floor Wire and Engine Room Main Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IE42Cowl Side Panel LH
IG42Cowl Side Panel RH
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
HORN
10A
HORN FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
23 15
1J 21F9
1
IA2 8
D D
6HORN
RELAY
B±R
B±W B±R B±R
HORN SW
[COMB. SW] C14 JUNCTION
CONNECTOR J20HORN H 4

2001 PRIUS (EWD414U)
HORN RELAY
5±3 : Closed with the horn SW on
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C1436H434J2037
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1F27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA242Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
SERVICE HINTS

2001 PRIUS (EWD414U)
POWER WINDOW
15A
DOMEFROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1J 720A
PWR1
2J 1110A
GAUGE
2K 1030A
POWER
23 15
2I 32K72K 1
B CBC
A AAA 2G 2
2D 4
IG1 1IC13IC18IC12
34
MIC1 7
11B F
A DAD 12 13 11 20 8 16
313
5 142
52 1
2
L±Y
W±R
R±L L±Y
R±L L±Y
W± R
R±L
B±L B±L
L±W GR
P±L
O
G
Y
R±Y R±Y
L±W
L±W
L±W
R±W
R±W R±W
POWER WINDOW MOTOR FRONT LH P10POWER WINDOW
MASTER SW P 9
DIODE
(
DOOR
COURTESY) D 4
DOOR
COURTESY SW
FRONT RH D 7
DOOR
COURTESY SW
FRONT LH D 6
JUNCTION
CONNECTORB J14 A , J15
JUNCTION
CONNECTORB J12 A , J13
CPUB
LMT SGND DDN DU DCTYDCTY
PLSBIGWLSW A B
B C
JUNCTION
CONNECTORB J24 A , J25L±Y
C
CJUNCTION
CONNECTOR J202 1
A 6
Y Y
18
MPX1RX
POWER
RELAY
IC1 19
W±B
E
IG A
JUNCTION
CONNECTOR J17
W±B
A
A
R±W R±W
JUNCTION
CONNECTOR J16
IB1 3
R±W R±W
7. 5A
ECU±B
2C 5B
9B
JUNCTION
CONNECTOR J27
R±G
R±GFF15BODY ECUB B 8 , B 9A
PULSE
SENSORLIMIT
SWIG1 5 IG

2001 PRIUS (EWD414U)
B 14 B15
IN1 1IN16
IQ1 2 65
3 L1 UL1
W±B
R±B G±B
W± BG± B
R±B
BODY ECUB B 8 , B 9A
UNLOCKLOCK
D10
DOOR LOCK
CONTROL SW
FRONT RH10A
HORN FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
23 15
1J 2 A 10
ID2 4IA28 A 20 A13 B13
IE1 9IE110
1
2 1
IE IFB 7C 84
AA
D D A
A
A6 SH HCTY IND HR
B±W B±W
R±W
LG±BR±W
LG±B
B±R B±R
B±R B±R B±R BR W± B W±B
BRTHEFT DETERRENT
HORN T 1
ENGINE HOOD
COURTESY SW E 2
CENTER CLUSTER SW C 7JUNCTION
CONNECTOR J27
JUNCTION
CONNECTOR J20
HORN
RELAY
JUNCTION
CONNECTOR J 7
JUNCTION
CONNECTOR J 1RADIO AND
PLAYERC R 3 , R 4B

2001 PRIUS (EWD414U)
A 17
IF
R
G
G
R GR BR
87
CF CF
F
CCENTER
CLUSTER SW C 7
GNDJUNCTION
CONNECTOR J26 M 7 , C
MULTI DISPLAYB M 5 , M 6A
AN 3, N 2 B
NAVIGATION ECU IJ1 17 IJ118 IJ119 IJ120
B 7
G3B B1
BVRB 6
VG B 7
R
B 3
G
B 1
Y
A 5
IJ1 3
A 52B 7
2A 6
A 13 B110A
GAUGE FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2C 3
25 13
IJ1 5A 14REV
R
G
Y
V±W V±W
V±W V±W
L
W± G
R±L R±B
R±B
R±BBR BR
COMBINATION METERB C10 , C11A 10 9
BACK±UP
LIGHT
RELAY B 5
RADIO AND
PLAYER R 4C 6
A 3A10
(
SHIELDED) (
SHIELDED)
SPDR±L
IJ1 21
BR
15 IJ1
8B
SYNCB 8
B B
A 14
IH 2A7
2B6
L
BR TX± TX+
GND1
G SYNC B VR SPD TX+ TX±
TX+ TX± A G
A GAG J27
JUNCTION
CONNECTORA
A DA D
J27
JUNCTION
CONNECTORA

2001 PRIUS (EWD414U)
EMPS
50A
EMPS
37. 5A
ECU±B FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2G 65A
ECU±IG
2I 2
52 3133
33A D
B E
D 5
D 2C1D7
IA2 7IM11IP13B 1B2 7 13 14
22
M2 M1 WL PIG RLYGR±G
P±B
W
W P±B GR± GB±Y B±YR±GB±R
B
GR
GR
B
Y L B GR
Y
B±Y B±YB±R
R±G
A E
EA
EMPS
RELAYJUNCTION
CONNECTOR J22
JUNCTION
CONNECTOR J26
JUNCTION
CONNECTORB J14 , J15A
DATA LINK CONNECTOR 3 D 2
IGTS TC SIL
COMBINATION METER C10
DC MOTOR D 1
C
EMPS ECUB E 3 , E 4A, E 5D, E 6 10A
GAUGE
2A 5
L
11
L
1
2
2A 7
2B 6
IH 14
L BR BR
1 2
M

2001 PRIUS (EWD414U)
EMPS
In this system, the controller determines the direction and the amount of the assistant force based on the signals from the
vehicle speed sensor and the torque sensor that is built in the gear box. The controller then assists the operation of the
steering wheel by controlling the DC motor installed in the steering gear box.
E5 (C), E6 (D) EMPS ECU
(D) 5±GROUND : Approx. 12 volts with the ignition SW at ON position
(C) 2±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B1136E5C36J18A37
C1036E6D36J19B37
D134J14A37J2237
D236J15B37J2637
E3A36J1637S135
E4B36J1737
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
324Engine Room R/B No.3 (Engine Compartment Right)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2A30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2I31Cowl 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)
IA242Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
ID142Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IM144Engine Room Main Wire and Cowl Wire (Right Kick Panel)
IO144Engine Wire and Cowl Wire (Right Kick Panel)
IP144Instrument Panel Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IG42Cowl Side Panel RH
IH42Right Kick Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I744Engine Wire
SYSTEM OUTLINE
SERVICE HINTS