2001priuseEWD

* 1 : W/ NAVIGATION SYSTEM
* 2 : W/O NAVIGATION SYSTEM

BR C7
CENTER CLUSTER SW
M5
MULTI TX– TX+ GND ACC EJCT +B
DISPLAY 874192

TX+ TX–
3 10

RR
GG

G
R
BR BR
GR GR
P–B P–B
L–R L–R
CF
FG

CR

C F J26
JUNCTION
CONNECTOR

10 C 9C 8 C 12 C 11 C 5 C
TX+ TX– GND ACC+B EJECT BU+B

R2 A , R3 B , R4 C
RADIO AND PLAYER

GND
7B

BR
BR

21 IJ1

BR
BR

IF

2001 PRIUS (EWD414U)

RADIO AND PLAYER

SERVICE HINTS
R3 (B) RADIO AND PLAYER
(B)4–GROUND : Always approx. 12 volts
(B)3–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
(B)7–GROUND : Always continuity

N2 NAVIGATION ECU
9–GROUND : Always approx. 12 volts

18–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
17–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

C7 36 J27 A 37 R3 B 37
37
F14 38 J28 B 37 R4 C 39
39
F15 38 M5 37 R8

J24 37 N2 39 R9

J26 37 R2 A 37
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1J 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

2D 30 Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IF1 42 Instrument Panel Wire and Floor Wire (Left Kick Panel)
IG1 42 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IJ1
IJ2 44 Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
IN1
44 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
IF 42 Left Kick Panel

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

NAVIGATION SYSTEM

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

G1
GATEWAY ECU

15A 10A 5A
DOME ACC ECU–IG

7 1J GTX– GTX+
12 5

2 2D 2 2I GG R
G
L–Y L–Y GR–R M5 A , M6 B , M7 C 11 A 4A
J14 MULTI DISPLAY TX3– TX3+
JUNCTION
CONNECTORD IG ACC +B1 PKB TC TX1+ TX1– VG R
D 2C 4 C 1 C 13 A 14 A 5B 10 B 6B 2B
B–Y B–Y
2 2G J21 GR–R L–Y R–Y
4 2D JUNCTION
BA BA CONNECTOR5 ID1D 7 ID1 BR
EB
B–Y
D R–Y R–Y CONNECTOR P–B
B–Y

J24 A , J25 B CA J27 A , J28 B I5
JUNCTION JUNCTION
CONNECTOR CONNECTOR J12 A , J13 B CONNECTOR JUNCTION (SHIELDED) RR (SHIELDED) WW
GR–R
CB CB CB EA
L–Y GR–R

L–Y L–Y B J26 JUNCTION E 6 IJ1 7 IJ1 22 IJ1 16 IJ1
J26 E
JUNCTION
CONNECTOR P–B (SHIELDED) (SHIELDED)

B

GR–R 1

1 IJ1 P2 13
PARKING TC
BRAKE SW

4 IJ1

GR–R D2

9A 18 A DATA LINK 5B 10 B 2B
+B ACC CONNECTOR 3 TX1+ TX1– R

N2 A , N3 B
NAVIGATION ECU

2001 PRIUS (EWD414U)

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

R R BR C7 10A
GG GAUGE
CENTER
CLUSTER SW

M5 A , M6 B , M7 C TX– TX+ 3 2C
MULTI DISPLAY 87
6C
G SYNC B VR SPD GND1 G
7B 8B 3B 1B 5A W–G R
TX+ TX–
3 A 10 A R–B
R–L
V–W
R–B
GA J27 A CF
F
JUNCTION
CONNECTOR C

GA GA C F J26
JUNCTION
R CONNECTOR R–L
B
G V–W
Y
(SHIELDED)
V–W

3 IJ1 10 9 13
TX+ TX–
7 2B B5
BACK–UP
17 IJ1 15 IJ1 18 IJ1 19 IJ1 20 IJ1 LIGHT
RELAY
R4
25
RADIO AND
6 2A PLAYER

R
B
G
Y
(SHIELDED)
V–W

L

J27 A DA

JUNCTION
CONNECTORD A

7B 8B 3B 1B 6B 5A 13 A 1B
G SYNC B VR VG SPD

N2 A , N3 B GND REV 14 A C10 A , C11 B
NAVIGATION ECU 17 A 14 A COMBINATION METER

BR BR L 6 BR
BR 2B
21 IJ1 5 IJ1 7
R–B 2A

IF IH

2001 PRIUS (EWD414U)

NAVIGATION SYSTEM

SERVICE HINTS
N2 (A) NAVIGATION ECU
(A) 9–GROUND : Always approx. 12 volts
(A)18–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
(A)17–GROUND : Always continuity

M7 (C) MULTI DISPLAY
(C)2–GROUND : Approx. 12 volts with the ignition SW at ON position
(C)4–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
(C)6–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

B5 36 J14 37 M6 B 37
37
C7 36 J21 37 M7 C 39
39
C10 A 36 J24 A 37 N2 A 37
37
C11 B 36 J25 B 37 N3 B

D2 36 J26 37 P2

G1 37 J27 A 37 R4

J12 A 37 J28 B 37

J13 B 37 M5 A 37
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1J 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

2A

2B Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
30

2C

2D

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
ID1 42 Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IJ1 44 Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

: GROUND POINTS

Code See Page Ground Points Location
IF 42 Left Kick Panel
IH 42 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I5 44 Instrument Panel Wire

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

GATEWAY SYSTEM

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A 7. 5A 5A
ACC ECU–B ECU–IG

2 2D 5 2C 2 2I

B–Y

GR–R D
R–G J14
JUNCTION
CA FA J27 A , J28 B CONNECTORB–Y B–Y GR–L
CB HB
JUNCTION D 11
CONNECTOR MPD2
5 ID1 MPD1
4 14 E10
MPX1
GR–B ENGINE
MPX2 CONTROL
13 MODULE

GR–R D GR GR–B GR
R–G J21
JUNCTION
CONNECTORB–Y GR–L 16
MPX–
9 8 G1 D B8
ACC BATT GATEWAY ECU MPX+
2 15 BODY
GTX– IG ECU
12
GTX+ GND CG
5 14 7

W–BE GR–B 2
J21 MPX+
G W–B JUNCTION C11
R CONNECTOR MPX–
3 COMBINATION
E METER

W–B

11 4 DB J22 A , J23 B 11
TX3– TX3+ EA MPX+
JUNCTION
CONNECTOR MP2+ A7
4
A/C
AMPLIFIER

M5 W–B
MULTI DISPLAY

A J24
W–B A
JUNCTION
A CONNECTOR

W–B

8 2D

W–B8 2K

A
J11
JUNCTION
CONNECTOR

ID

2001 PRIUS (EWD414U)

SERVICE HINTS

G1 GATEWAY ECU
8–GROUND : Always approx. 12 volts
2–GROUND : Approx. 12 volts with the ignition SW at ON position
9–GROUND : Approx. 12 volts with the ignition SW at ACC or ON position

7, 14–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

A7 36 J11 37 J24 37
37
B8 36 J14 37 J27 A 37
37
C11 36 J21 37 J28 B

E10 36 J22 A 37 M5

G1 37 J23 B 37
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

2C Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
30

2D

2I Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
31

2K

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
ID1 42 Instrument Panel Wire and Cowl Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
ID 42 Cowl Side Panel LH

2001 PRIUS (EWD414U)

ELECTRIC TENSION REDUCER

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

5A
ECU–IG

4 2C

B–Y B–Y12 IJ1

1G
T6
TENSION REDUCERW–B
SOLENOID

2

3
B20
TENSION REDUCER LH
[BUCKLE SW LH]

1

11 IJ1

W–B

DB J22 A , J23 B
EA
JUNCTION
CONNECTOR

W–B

A
J24
JUNCTION
CONNECTOR

A

W–B

W–B8 2D

8 2K

A
J11
JUNCTION
CONNECTOR

ID

2001 PRIUS (EWD414U)

SERVICE HINTS
T6 TENSION REDUCER SOLENOID

1–GROUND : Approx. 12 volts with the ignition SW at ON position

B20 TENSION REDUCER LH
1–2 : Closed with driver’s seat belt in use

: PARTS LOCATION

Code See Page Code See Page Code See Page

B20 38 J22 A 37 J24 37
39
J11 37 J23 B 37 T6
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

2C Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
30

2D

2K 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IJ1 44 Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)

: GROUND POINTS

Code See Page Ground Points Location
ID 42 Cowl Side Panel LH

2001 PRIUS (EWD414U)

EMPS

FROM POWER SOURCE SYSTEM (SEE PAGE 50)
1

10A 50A 7. 5A 5A GR–G
GAUGE EMPS ECU–B ECU–IG
P–B
2
W
5 2A 3 6 2G 2 2I
EA
L B–Y B–Y J26 J22
B–R JUNCTION JUNCTION
R–G CONNECTOR CONNECTOR

EA

DA J14 A , J15 B GR–G P–B W
EB
JUNCTION
CONNECTOR

14 13 7
TS TC SIL

B–R
R–G

22 33 5D D2
14 11 31 IG DATA LINK CONNECTOR 3

EMPS E3 A , E4 B , E5 C , E6 D
RELAY EMPS ECU

C10 52 RLY PIG WL M1 M2
COMBINATION METER 33 2D 1C 7D 1B 2B

B GR GR
GR BB
LY
L B–Y Y
L D1
DC MOTOR
7 IA2 1 IM1 3 IP1
B–Y
7 2A

6 2B

BR 2
M

1

BR

IH

2001 PRIUS (EWD414U)

GR–G 3 GR–G
P–B ID1
W
2 P–B
ID1

1W
ID1

ECB
J16
JUNCTION
CONNECTOR

ECB

W–L
P–B
GR–G

E3 A , E4 B , E5 C , E6 D 1D 3D 9D
EMPS ECU SIL TC TS

PGND TRQV TRQ1 TRQ2 TRQG WRR WRL
2C 1A 4A 2A 3A 4D 10 D

W–B I7
(SHIELDED)

W
R
G
B
W–B
(SHIELDED)
B
W
(SHIELDED)

2134 23 15
RRO RLO
VCC VT1 VT2 GND 5 IO1

W–B

S1 B11
BRAKE ECU
STEERING SHAFT
TORQUE SENSOR

AB AB
AA
J18 A , J19 B
JUNCTION
CONNECTOR

W–B

W–B A J17
A
JUNCTION
CONNECTOR

IG

2001 PRIUS (EWD414U)

EMPS

SYSTEM OUTLINE
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.

SERVICE HINTS

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

Code See Page Code See Page Code See Page
B11 E5 C J18 A
C10 36 E6 D 36 J19 B 37
D1 36 J14 A 36 37
D2 34 J15 B 37 J22 37
E3 A 36 37 J26 37
E4 B 36 J16 37 S1 35
36 J17 37

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

3 24 Engine Room R/B No.3 (Engine Compartment Right)
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

2A Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
30

2B

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA2 42 Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
ID1 42 Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IM1 44 Engine Room Main Wire and Cowl Wire (Right Kick Panel)
IO1 44 Engine Wire and Cowl Wire (Right Kick Panel)
IP1 44 Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
IG 42 Cowl Side Panel RH
IH 42 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
I7 44 Engine Wire

2001 PRIUS (EWD414U)

SRS

NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.
D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information

when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
D Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK” position and the

negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)
D When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each
memory system, never use a back–up power supply from outside the vehicle.
D Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.
D Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner,
airbag sensor assembly or side airbag sensor directly to hot air or flames.
D Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, airbag sensor assembly and side airbag sensor assembly
should be inspected.
D Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.
D Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt
pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse it.
D If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, airbag sensor
assembly or side airbag sensor assembly has been dropped, or if there are cracks, dents or other defects in the case,
bracket or connector, replace them with new ones.
D Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting the system’s electrical circuits.
D Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.
D After work on the SRS is completed, perform the SRS warning light check.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.

2001 PRIUS (EWD414U)

SRS

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

AM1 ACC 10A
IG1 SRS ACC

4 2E

7 AM2 IG2 6 B–W
ST2 GR
W–R

I15
IGNITION SW

2 2C 5 2B H13 S4 S5
SIDE AIRBAG SENSOR LH SIDE AIRBAG SENSOR RH
HYBRID VEHICLE
CONTROL ECU 1234

1 2G 2 2E ABFS
3 1234

W–R

B–O
GR
L
P–L
(* 1)
L–W
(* 1)
LG–B
(* 1)
GR–L
(* 1)
P
(* 1)
L–Y
(* 1)
LG
(* 1)
GR
(* 1)

9 1J 5B 6B 23 B 7A 10 A 12 A 9A 12 C 9C 7C 10 C
IG2 ACC GSW2 VUPL SSL+ SSL– ESL VUPR SSR+ SSR– ESR
15A
AM2 A17 A , A18 B , A19 C PL–
1A
2 1B AIRBAG SENSOR ASSEMBLY

D+ D– P+ P– SFL+ SFL– SFR– SFR+ PL+ PR+ PR–
14 B 13 B 10 B 1C 2A 5C 6C
11 B 6A 5A 2C

B
Y–B
Y
Y–R
Y–G
Y–R
(* 1)
Y–G
(* 1)
Y–G
(* 1)
Y–R
(* 1)
Y–B
Y
Y–B
Y

1C F12 C , F13 D
1D
FUSIBLE
LINK
BLOCK
NO. 1

B–G

12
1

120A MAIN F18 SPIRAL
CABLE
FUSIBLE
LINK BLOCK 1212212121
NO. 2

A21 A20 S6 S7 P14 P15
AIRBAG SQUIB AIRBAG SQUIB
(STEERING (FRONT PASSENGER SIDE AIRBAG SIDE AIRBAG PRETENSIONER PRETENSIONER
WHEEL PAD) AIRBAG ASSEMBLY) SQUIB LH SQUIB RH LH RH

BATTERY

2001 PRIUS (EWD414U)

* 1 : W/ SIDE AIRBAGS FROM POWER SOURCE SYSTEM (SEE PAGE 50)

TC D2 C10 A , C11 B 10A
13 DATA LINK ACC
CONNECTOR 3 SRS WARNING LIGHT
E [COMB. METER] 2 2D
E SIL AB 16
76 A CA

5 GR–R
B
P–B J27 A , J28 B
J26 AA CB JUNCTION
JUNCTIONCB CONNECTOR
CONNECTOR B
4 2B 9 2A 14 A GR–R BGR–R
W
J22 A , J23 B L J26
JUNCTION JUNCTION
CONNECTOR CONNECTOR

B–Y
L

1 2E

P–B
W
B–Y

19 B 12 B 3B
TC SIL LA

–SL A17 A , A18 B , A19 C
26 B
AIRBAG SENSOR ASSEMBLY

+SL +SR –SR LBE+ RBE+ E2 E1
15 B 8C 28 B 27 B
9B 20 B 11 A
3 3 2E 7 2A
W–R BR BR B–W G–O J29 B9 W–B W–B
JUNCTION 9 IJ1 BODY ECU
A CONNECTOR 23
BR–W G–OA G–O P–L P–L
2
1 IL1 2 IL1 3 IL1 4 IL1 B20
1 BUCKLE SW
LH B21 BR L
BUCKLE SW RH AND
W–R B–W BR–W W–B SEAT BELT WARNING
OCCUPANT DETECTION SENSOR
11 IJ1
2121

W–B J22 A , J23 B
JUNCTION CONNECTOR
DB 8 2D 8 2K 6 2B
EA
1 W–B W–B
W–B
F1 F2 W–B

FRONT AIRBAG SENSOR FRONT AIRBAG SENSOR
LH RH

AA AA J24 A , J25 B 10 IJ1 W–B
JUNCTION
CONNECTOR A W–B
J11
AB W–B JUNCTION
CONNECTOR
W–B IH
ID

2001 PRIUS (EWD414U)

SRS

SYSTEM OUTLINE

The SRS is a driver and front passenger protection device which has a supplemental role to the seat belts.
When the ignition SW is turned to ACC or ON, current from the SRS ACC fuse flows to TERMINAL (B) 6 of the airbag sensor
assembly. Only when the ignition SW is on does the current flow TERMINAL (B) 5 of the airbag sensor assembly.
If an accident occurs while driving, when the frontal impact exceeds a set level, current flows to TERMINALS (B) 14, (B) 10,
(A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the airbag squibs and the pretensioners to TERMINAL 2 to
TERMINALS (B) 13, (B) 11, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or BODY GROUND
to GROUND, so that current flows to the front airbag squibs and the pretensioners and causes them to operate.
When the side impact also exceeds a set level, current from the ignition SW (IG2) or SRS ACC fuse flows to TERMINALS
(A) 5, (C) 2, (A) 2 and (C) 5 of the airbag sensor assembly to TERMINAL 1 of the side airbag squibs and the pretensioners to
TERMINAL 2 to TERMINALS (A) 6, (C) 1, (A) 1 and (C) 6 of the airbag sensor assembly to TERMINAL (B) 27, (B) 28 or
BODY GROUND to GROUND, causing side airbag squibs and the pretensioners to operate.
The airbag stored inside the steering wheel pad is instantaneously expanded to soften the shock to the driver.
The airbag stored inside the passenger’s instrument panel is instantaneously expanded to soften the shock to the front
passenger.
Side airbags are instantaneously expanded to soften the shock of side to the driver and front passenger (w/ side airbags).
The pretensioners make sure of the seat belt restrainability.

: PARTS LOCATION

Code See Page Code See Page Code See Page

A17 A 36 F1 34 J25 B 37
37
A18 B 36 F2 34 J26 37
37
A19 C 36 F12 C 34 J27 A 37
39
A20 36 F13 D 34 J28 B 39
39
A21 36 F18 38 J29 39
39
B9 36 H13 37 P14 39

B20 38 I15 37 P15

B21 38 J11 37 S4

C10 A 36 J22 A 37 S5

C11 B 36 J23 B 37 S6

D2 36 J24 A 37 S7
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
27

1J

2A

2B

2C 30 Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2D

2E

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2K 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IJ1 44 Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
IL1 44 Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
ID 42 Cowl Side Panel LH
IH 42 Right Kick Panel

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

ABS

FROM POWER SOURCE SYSTEM (SEE PAGE 50)
11

20A 30A 40A
ABS NO. 3 ABS NO. 2 ABS NO. 1

7 AM2 IG2 6
ST2
2 2
6 1K 4 1K 3

W–R I15 B–W
IGNITION SW W–L
B–W
B
2 2C W–R

1 2G

W–R 14 R
IA2 L–O
9 1J G–W LG–R Y–B Y–B
Y–G L–O Y–B
15A B–L
AM2 HYDRO MTR 22 22 HYDRO MTR 33 ABS SOL RELAY LG–R
NO. 1 RELAY13 13 NO. 2 RELAY Y–G
2 1B 14
24 2
22
B–G B 24 36
22 333

1C G W–B R

F12 C , F13 D
FUSIBLE LINK
BLOCK NO. 1

1D

1 F18

120A FUSIBLE LINK
MAIN BLOCK NO. 2

G
G–W
W–B

BATTERY

2001 PRIUS (EWD414U)

B1 A , B2 B , B3 C
BRAKE ACTUATOR

1B 9C 5C 10 C 2B 12 C 3B 4C 11 C 3C 6C 2C 1C

B–W R
R–B
R R–W
L–O Y–B
Y–B R–G
R–Y
R–L
G–W
G–B
G–O
B–O

L
LG
5 2B
12 2G

B–W

7B 3D 1C 1A 2A 21 A 7A 8A 9A 4A 3A 5A 6D 1D 8D
R1+ R2+ IG2 SFRH SFRR SFLH SFLR SRRH SRRR SMC1 SMC2 SS AST SLA+ SLA–

MR2 B10 A , B11 B , B12 C , B13 D
2D BRAKE ECU

SR MR1 GND1 GND2 MTT MT+ MT– PH PL
19 A 29 A 31 A 6A 27 A 28 A 18 A 11 A 9D

B–L

LG–R W–B
Y–G W–B
W–L
Y–G

Y
GR
Y–R

3B 3A 6A 1A 5B
4A 4B
H5 A , H6 B
HYDRAULIC BOOSTER

W–B 2A 2B 5A 1B
W–B

G W–B W–B W–B W–B
G–W
W–B W–B E5 W–B
E5 E5

W–B W–B

A A W–B A A W–B
A A
J1

JUNCTION
CONNECTOR

IE J7

JUNCTION
CONNECTOR

2001 PRIUS (EWD414U)

ABS

B1 A , B2 B , B3 C
BRAKE ACTUATOR

8C 7C 9A 5A 1A 12 A 8A 4A 11 A 7A 3A

P
V
(SHIELDED)
B
W
R
(SHIELDED)
(SHIELDED)
B
W
R
(SHIELDED)
(SHIELDED)
B
W
R
(SHIELDED)

16 D 7D 10 A 22 A 23 A 12 A 16 C 25 C 24 C 15 C 9C 28 C 27 C 18 C
SLR+ SLR– VCM PMC E2 SG1 VREG PREG EREG SG2 VFR PFR EFR SG3

LBL B10 A , B11 B , B12 C , B13 D
7C BRAKE ECU

GND3 GND4 FL+ FL– FSS FR+ FR– RL+ RL–
8B 17 B 16 A 15 A 24 A 14 A 13 A 19 B 20 B

LG–R G I1 L
W–B BR (SHIELDED)
W–B LL
(SHIELDED) P (SHIELDED) (SHIELDED)
P
R

5 IB1 1 IB1 2 IB1

2 B4 P
BRAKE FLUID LEVEL
WARNING SW 21 21 12

A4 A5 A23

1 ABS SPEED SENSOR ABS SPEED SENSOR ABS SPEED SENSOR

FRONT LH FRONT RH REAR LH

W–B
W–B
W–B

A
J11
JUNCTION
CONNECTOR

ID

2001 PRIUS (EWD414U)

B1 A , B2 B , B3 C FROM POWER SOURCE SYSTEM (SEE PAGE 50)
BRAKE ACTUATOR 1

10A 5A
ABS NO. 4 ECU–IG

10 A 6A 2A

2
3 2 2I

(SHIELDED) DA J14 A , J15 B B–Y BUZZER
B EB JUNCTION 2 B14
W CONNECTOR 1 BRAKE WARNING
R BUZZER
EB 13 IA2
(SHIELDED)
L B–Y G

B–Y B–Y

G

5D 13 D 20 D 19 D 22 D 6B 20 C
VRR PRR ERR SG4 +BS IG1 BZ

B10 A , B11 B , B12 C , B13 D
BRAKE ECU

RSS RR+ RR– PKB HVI+ HVI– HVO+ HVO– RRO RLO
21 B 11 B 12 B 13 C 24 B 16 B 14 B 22 B 23 B 15 B

BR–B BR LG V R B
(SHIELDED) (SHIELDED) (SHIELDED) W
I3 E6
R–Y G EMPS ECU
W–B
I3 W–B18 IA2 I3

(SHIELDED) 20 30 18 17 4 10
Y HVI+ HVI– HVO+ HVO–
(SHIELDED)

R–Y H15
HYBRID VEHICLE CONTROL ECU

12 A

A24 A J10
ABS SPEED SENSOR JUNCTION
REAR RH
CONNECTOR
E A
J12

JUNCTION

CONNECTOR

E AB
AA
R–Y J18 A , J19 B
W–B
W–B JUNCTION
CONNECTOR

1 A A
J11 J17
P2 JUNCTION JUNCTION
PARKING CONNECTOR CONNECTOR
BRAKE SW
ID IG

2001 PRIUS (EWD414U)

ABS

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

15A 10A
STOP GAUGE

9 2K 5 2A

R–B LL GR–L

2 14 GR
MPX1 E10
S3 ENGINE CONTROL
STOP MPX2 MODULE
LIGHT SW 13

1 16 A
MPX–
G–W R–Y
MPX+
EA J14 A 2 2K 15 A
EA GR–B
JUNCTION 4 B8 A
CONNECTOR PKB
BODY ECU
G–W R–Y V–R
B–W B–W
V–R

1B 5 B 18 B 2 B 1 IP1 2 IP1
STP BRL WA SP1

L
L

B10 A , B11 B , B12 C , B13 D
BRAKE ECU

9A 10 A 22 A 2B

TC D/G TS ABS
3B 10 B 4B BRAKE

P–B W–L
GR–G

CEB
J16
JUNCTION
CONNECTOR

CEB

P–B 14 A C10 A , C11 B 3B
W COMBINATION METER
GR–G

2 ID1 1 ID1 3 ID1 BR L A7 GR–L
A/C AMPLIFIER
E P–B P–B 7 2A 11 G1 11
E J26 6 2B GR MPX+ GATEWAY ECU MPD2
JUNCTION
13 CONNECTOR MP2+ MPD1
TC 4 4
WW
J22
JUNCTION
CONNECTOR
GR–G
A
A GR–B

7 14
SIL TS

D2 IH
DATA LINK CONNECTOR 3

2001 PRIUS (EWD414U)

SYSTEM OUTLINE

1. INPUT SIGNALS

(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the brake ECU.

(2) Stop light SW signal
A signal is input to TERMINAL STP of the brake ECU when the brake pedal is depressed.

2. ABS SYSTEM OPERATION
During sudden braking the brake ECU has signals input from each sensor, which controls the current to the solenoid inside
the actuator and lets the hydraulic pressure acting on each wheel cylinder escape to the reservoir. The pump inside the
actuator is also operating at this time and it returns the brake fluid from the reservoir to the master cylinder, thus preventing
locking of the vehicle wheels.
If the brake ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current on the solenoid is
controlled and the hydraulic pressure is increased. Holding of the hydraulic pressure is also controlled by the brake ECU, by
the same method as above. Pressure reduction, holding and increase are repeated to maintain vehicle stability and to
improve steerability during sudden braking.

SERVICE HINTS
A4, A5 ABS SPEED SENSOR FRONT LH, RH

2–1 : 1.4–1.8 kΩ (20°C, 68°F)

A23, A24 ABS SPEED SENSOR REAR LH, RH
2–1 : 1.04–1.3 kΩ (20°C, 68°F)

B10 (A), B11 (B), B12 (C), B13 (D) BRAKE ECU
(B) 6, (C) 1–GROUND : Approx. 12 volts with the ignition SW at ON position
(D) 22–GROUND : Always approx. 12 volts
(A) 6, (A)31–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page
A4 C10 A J10
A5 34 C11 B 36 J11 37
A7 34 36 J12 37
A23 36 D2 36 J14 A 37
A24 38 E6 36 J15 B 37
38 E10 36 J16 37
B1 A 34 F12 C 34 J17 37
B2 B 34 F13 D 34 J18 A 37
B3 C 34 F18 38 J19 B 37
34 G1 37 J22 37
B4 36 H5 A 34 J26 37
B8 A 36 H6 B 34 P2 37
B10 A 36 H15 38 S3 37
B11 B 36 I15 37 37
B12 C 36 J1 37
B13 D 36 J7 37

B14

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)
2 23 Engine Room R/B No.2 (Right Side of Reserve Tank)
3 24 Engine Room R/B No.3 (Engine Compartment Right)

2001 PRIUS (EWD414U)

ABS

,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1B

1J 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

1K

2A

2B 30 Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)

2C

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2I Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
2K 31

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA2 42 Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IB1 42 Floor Wire and Cowl Wire (Cowl Side Panel LH)
ID1 42 Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IP1 44 Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
ID
IE 42 Cowl Side Panel LH
IG 42 Cowl Side Panel RH
IH 42 Right Kick Panel

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E5 40 Engine Room Main Wire I3 44 Cowl Wire
I1 44

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

REAR WINDOW DEFOGGER

FROM POWER SOURCE SYSTEM (SEE PAGE 50)
1

40A 10A
DEF GAUGE

2

51

DEF
RELAY

32

4 2M 13
DFG
B8 A
MPX+
15 A BODY
ECU

B
GR–B

2 C11
MPX+
COMBINATION
MPX– METER
3

1REAR WINDOW 11 REAR WINDOW
DEFOGGER MPX DEFOGGER SW
N4
NOISE FILTER GR PSG
(REAR WINDOW DEFOGGER) SW
RDEF

A7
A/C AMPLIFIER

2001 PRIUS (EWD414U)

SERVICE HINTS
DEF RELAY

5–3 : Closed with the ignition SW on and the rear window defogger SW on

: PARTS LOCATION

Code See Page Code See Page Code See Page

A7 36 C11 36

B8 A 36 N4 39
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

2M 31 Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)

2001 PRIUS (EWD414U)

COMBINATION METER B8 A , B9 B
BODY ECU
FROM POWER SOURCE SYSTEM (SEE PAGE 50)

7. 5A 10A 15A B FUA FU+ FU– MPX– MPX+
ECU–B GAUGE DOME 9B 20 11 19 16 B 15 A
6 2J 8 2J 9 2J

5 2C 5 2A 7 1J R–G YY Y–B Y–B BR–R GR
GR–B

516

R–G L–Y BR–R

FA J27 A 2 2G FUEL F16 13
FA 4 2A SENDER FUEL SENDER MPX2
JUNCTION GR–L
CONNECTOR SENSOR E10 MPX1
ENGINE CONTROL14
L MODULE

L–Y L–Y
L–W L–R
84

R–G L

4 IP1 5 IP1

L GR–L
L 2B

22 A 21 A 20 A 12 A C10 A , C11 B
COMBINATION METER

VFD

14 A 2A 3A 1A 7B 6B 1B 9A 11 A

BR L W–L
L LG–R
L W–G
L
L
L

7 2A 3 5 1
6 2B E ODO TC

H8 TO LIGHT
CONTROL RHEOSTAT
ODO/TRIP SW
[HAZARD WARNING SW] FROM BACK–UP
LIGHT RELAY
FROM BRAKE ECU
FROM EMPS ECU

IH

2001 PRIUS (EWD414U)

GR–L V–W FROM HYBRID VEHICLE
V–W CONTROL ECU

FROM ENGINE CONTROL MODULE

G1 11 GB GB J27 A , J28 B
GATEWAY ECU MPD2 GA GA JUNCTION
MPD1 CONNECTOR
4
GA
4
MP2+GR–B V–W
MPX+ V–W
11
A7 7 2B V–W FROM MULTI DISPLAY
A/C AMPLIFIER 3B 6 2A FROM NAVIGATION ECU

GR–L GR L
DOOR
13 A HEAD C10 A , C11 B
BRAKECOMBINATION METER
SEAT BELT
(DRIVER’ S SEAT)
SEAT BELT
(FRONT
PASSENGER’ S SEAT)

OIL
CHARGE

BUZZER

2001 PRIUS (EWD414U)

CRUISE C10 A , C11 B CB BA GR–R COMBINATION METER
COMBINATION METER
WATER TEMP. FROM POWER SOURCE SYSTEM (SEE PAGE 50)
2001 PRIUS (EWD414U) 4B (LOW) J27 A , J28 B
10A
WATER TEMP. JUNCTION ACC
(HIGH) CONNECTOR
2 2D
OUTPUT CONTROL
MALFUNCTION
INDICATOR LAMP

TO ENGINE G–R GR–R
CONTROL MODULE L
10 A
TO BRAKE ECU B–Y
16 A ABS
TO AIRBAG SENSOR GR–R
ASSEMBLY SRS B
TURN L B
TURN R 5B J26 * 1 : W/O DAYTIME RUNNING LIGHT
HIGH BEAM * 2 : W/ DAYTIME RUNNING LIGHT
JUNCTION
CONNECTOR

GR–R

19 A L

18 A FROM TURN SIGNAL
FLASHER RELAY
L

17 A L FROM HEADLIGHTS (* 1)

FROM DAYTIME RUNNING
LIGHT RELAY (* 2)

SERVICE HINTS

C10 (A), C11 (B) COMBINATION METER
(A)22–GROUND : Approx. 12 volts with the ignition SW at ON position
(B) 5–GROUND : Approx. 12 volts with the ignition SW at ON or ACC position
(A)21–GROUND : Always approx. 12 volts
(A)14–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page

A7 36 C11 B 36 H8 37
37
B8 A 36 E10 36 J26 37
37
B9 B 36 F16 38 J27 A

C10 A 36 G1 37 J28 B
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1J 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

2A

2B Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2C 30

2D

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

2J 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IP1 44 Instrument Panel Wire and Cowl Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
IH 42 Right Kick Panel

2001 PRIUS (EWD414U)

RADIATOR FAN AND CONDENSER FAN

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

1 30A 5A
CDS FAN ECU–IG
30A
RDI 7 2G

2 31 51 V–Y
B–Y
51 4 FAN NO. 2 FAN NO. 3
RELAY RELAY B–Y
FAN NO. 1
RELAY 52 32

32

7 1K 3 1K 11 1A 5 1J 10 1J 2 1K 5 1K 12 1J 4 1J

L–W W–B LG L–W R–W W–G
A1
2 4 E7 6 IE1 A/C CONDENSER FAN1 7 IE1
FAN ENGINE CONTROL MOTORM
R1 MODULE
M RADIATOR FAN R–W G–W2

MOTOR

1

W–B E5

W–B 1 V–Y V–Y V–Y
RF A 8
EA J27 A , J28 B
A/C AB
AMPLIFIER JUNCTION
CONNECTOR
2

A3
A/C SINGLE
PRESSURE SW

3

W–B 11 IE1

A J7 2
W–B A JUNCTION W4
CONNECTOR WATER TEMP. SW
A A
1
W–B
W–B

A
J1
JUNCTION
CONNECTOR

IE

2001 PRIUS (EWD414U)

SYSTEM OUTLINE
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.

SERVICE HINTS

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

Code See Page Code See Page Code See Page

A1 34 J1 37 R1 35
35
A3 34 J7 37 W4

A8 36 J27 A 37

E7 36 J28 B 37
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A 27 Engine Wire and Engine Room J/B (Engine Compartment Left)

1J Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1K 27

2G 31 Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IE1 42 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
IE 42 Cowl Side Panel LH

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E5 40 Engine Room Main Wire

2001 PRIUS (EWD414U)

AIR CONDITIONING

FROM POWER SOURCE SYSTEM (SEE PAGE 50)
1

50A
HTR

2

15 51
CLR MG
4 HTR RELAY
RELAY
32
23

8 1K 13 1J 5 1A 3 1F 4 1F 3 1K

B–R B–R J2 A , J3 B B–L LG–R W–B
JUNCTION R
CONNECTOR
8 IE1
L–O
AA AA LG–R

B–R AB L–O
LG–R
1 B B R 13 B–L
B6 J6 IE1
JUNCTION R
M BLOWER CONNECTOR
MOTOR V
B
2
B–W V R
12
VM +B 3 L–Y
SI R4
B7 A3
BLOWER MOTOR GND 33 A/C DUAL PRESSURE SW
LINEAR CONTROLLER 4

W–B 13

A/C W/P 1
RELAY E5

25 2 W–B W–B L–Y
33 W2
L–R
M WATER PUMP W–B W–B
MOTOR (A/C) W–B

1

L

L–R

W–B J1 W–B A A
JUNCTION A A
CONNECTOR

AA

IE J7

JUNCTION
CONNECTOR

2001 PRIUS (EWD414U)

FROM POWER SOURCE SYSTEM (SEE PAGE 50)

10A 7. 5A
HTR ECU–B

3 2D 5 2C

J22 A , J23 B R–G L–O
JUNCTION CONNECTOR
R J27 A FA FROM CONVERTER FROM FAN A10 W A12 W
R CA CA JUNCTION CONNECTORFA NO. 2 RELAY A/C ROOM 1 A/C THERMISTOR 2
TEMP. SENSOR
AB 2 1

L–O LG–R Y R–W W W
LG–R R W W
B–L
R–G
R
V 10 B 1A 8A 10 A 1B 4C 3C 1C 2C
MGC IG +B IDH RF TR SGTR TE SGTE
A
J6 A7 A , A8 B , A9 C
JUNCTION A/C AMPLIFIER
CONNECTOR
BLW PSW WP LOCK SGLOCK CF GND
A 3A 11 B 3B 9B 18 B 2B 7A

L–YV V V–Y
L–Y W–B
L–R L–R
W–L
W–B BR–W

21 IE1 15 IE1 20 IE1 4 IE1 5 IE1

EA AB
L–Y L–R J27 A , J28 B
V W–L BR–W JUNCTION AA
CONNECTOR
B–L 4 IK1 5 IK1W–LBR–W V–YAB 8 2D
142 J24 A , J25 B11 IE1
JUNCTION 8 2K
CONNECTOR
W–B A
J11
A2 W4 2 JUNCTION
A/C MAGNETIC CLUTCH WATER TEMP. SW1 CONNECTOR
AND LOCK SENSOR
V–Y ID
W–B W–B

2001 PRIUS (EWD414U)

AIR CONDITIONING

B8 A
BODY ECU

HRLY MPX+ MPX–
18 15 A 16 A

6 2F

L–O P–G GR
GR–B

5 IA2 W–G
A6
GR–L AMBIENT TEMP. SENSOR

C11 W–G E 8 B , E 9 C , E10 D
COMBINATION METER ENGINE CONTROL MODULE
2 11 G1 14 D 13 D 23 C 2
MPX+ MPD2 GATEWAY ECU MPX1 MPX2 TAM 1
MPX–
3 MPD1 MEO2 ACT E2
4 3D 22 D 18 B
11 A
MPX+ BR

GR GR–B LG 2 IK1 BR–W

4A 4B 5B
MP2+ NE ACT

A7 A , A8 B , A9 C
A/C AMPLIFIER

S5TS TS SGTPI S5TPI TPI AIF AIR
6C 5C 20 C 18 C 19 C 22 C 21 C

W 2
A11
A/C SOLAR1
SENSORW

W
W
W
W
W
W
12345
M

A14
AIR INLET CONTROL SERVO MOTOR

2001 PRIUS (EWD414U)

BSET TSET MSET PIG5 PSG SW SW SW SW PIG LED LED LED LED

A/C F/R RDEF FULL A/C A/C F/R RDEF FULL A/C

A7 A , A8 B , A9 C
A/C AMPLIFIER

S5TP SGTP TP AMC AMH S5TPM SGTPM TPM AOF AOD
17 C 15 C 16 C 14 C 13 C 7C 9C 8C 10 C 11 C

6 II1 W–R W 7 II1 5 II1 3 II1 2 II1 1 II1
BR–Y W
Y–R W

LW
BR–R W

WW
BR–W W
GR–L W

RW
Y–B W
8 II1 9 II1 10 II1 4 II1

12345 12345

M M

A15 A16
AIR MIX CONTROL SERVO MOTOR AIR VENT MODE CONTROL SERVO MOTOR

2001 PRIUS (EWD414U)

AIR CONDITIONING

FROM POWER SOURCE SYSTEM (SEE PAGE 50) 1
11
30A
10A 50A 30A HTR1
GAUGE HTR3 HTR2
2
8 2G 2 2 3
3 3

R–L
G
G–W
B–R

R–L R–L

33 33 33

13 23 13
HTR3 HTR1
RELAY HTR2 RELAY
RELAY
25 25
15
33 33
18 P 33
IE1
P P–B
L–Y
13 B L–R
HTR2 P–B
G–R
A7 A , A8 B , A9 C
A/C AMPLIFIER 1A 3B 1B
2A 4B P3 A , P4 B
HTRO
6B PTC HEATER

P–B 2B

W–B
W–B
W–B
16
IE1

1 IA1 5 IA1

W–B
W–B
W–B

A AA
J1 J11
JUNCTION JUNCTION
CONNECTOR CONNECTOR

IE ID

2001 PRIUS (EWD414U)

SERVICE HINTS

A3 A/C DUAL PRESSURE SW
1–4 : Open with the refrigerant pressure at less than approx. 196 kpa (2.0 kgf/cm2, 28.4 psi),
or more than approx. 3140 kpa (32 kgf/cm2, 455 psi),

A7 (A), A8 (B), A9 (C) A/C AMPLIFIER
(A) 8–GROUND : Always approx. 12 volts
(A) 1–GROUND : Approx. 12 volts with the ignition SW at ON position
(A)24–GROUND : Always continuity

: PARTS LOCATION

Code See Page Code See Page Code See Page
A2 B6 J7
A3 34 B7 36 J11 37
A6 34 36 37
34 B8 A 36 J22 A 37
A7 A 36 C11 36 J23 B 37
A8 B 36 36 J24 A 37
A9 C 36 E8 B 36 J25 B 37
36 E9 C 36 J27 A 37
A10 36 E10 D 37 J28 B 37
A11 36 37 P3 A 37
A12 36 G1 37 P4 B 37
A14 36 J1 37 35
A15 36 J2 A 37 W2 35
A16 J3 B W4
J6

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

3 24 Engine Room R/B No.3 (Engine Compartment Right)
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1A 27 Engine Wire and Engine Room J/B (Engine Compartment Left)

1F

1J 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

1K

2C Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D 30

2F Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
31

2G

2K 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA1
IA2 42 Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IE1
II1 42 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
IK1 44 Instrument Panel Wire and A/C Sub Wire (Instrument Panel Brace LH)
44 Engine Wire and Engine Room Main Wire (Right Kick Panel)

: GROUND POINTS

Code See Page Ground Points Location
ID 42 Cowl Side Panel LH
IE

2001 PRIUS (EWD414U)

AIR CONDITIONING

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E5 40 Engine Room Main Wire

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

I GROUND POINT

WATER PUMP W–B FAN NO. 2
MOTOR (INVERTER) RELAY
IGCT RELAY W–B W–B A A W–B W–B 3
2 IG2 RELAY
E5 E 5 1K
W–B E5
(–S) W–B W–B W–B W–B W–B W–BE5 W–B HTR RELAY
(CUT–) W–B E5
A/C TRIPLE W–B E5
PRESSURE SW W–B E5
W–B
W–B EFI RELAY
E5
ENGINE HOOD
HYDRAULIC BOOSTER W–B W–B W–B W–B W–B COURTESY SW
E5
WATER PUMP MOTOR FRONT WIPER MOTOR
(A/C) J7 W–B
E5 FRONT TURN
FRONT PARKING JUNCTION SIGNAL LIGHT LH
LIGHT LH CONNECTOR
RADIATOR FAN MOTOR
FRONT PARKING W–B
LIGHT RH E5

FRONT SIDE MARKER W–B E1 W–B A W–B HYDRAULIC BOOSTER
LIGHT LH W–B E1 E5
W–B E1 ABS SOL
FRONT SIDE MARKER W–B W–B W–B W–B W–B W–BE1 W–B 3 RELAY
LIGHT RH W–B E1
W–B E1 W–BA W–B INVERTER
FRONT TURN W–B
SIGNAL LIGHT RH A W–B (GND1)
A (GND2)
BRAKE FLUID LEVEL
WARNING SW J1 BRAKE ECU
JUNCTION
WATER TEMP. SW CONNECTOR W–B

DRL RELAY A A W–B PTC HEATER

W–B A A W–B BLOWER MOTOR
LINEAR CONTROLLER

W–B EC IE
3

(* 1)

IGNITION COIL AND W–B E3 J8 A , J9 B BR (E1) ENGINE CONTROL
IGNITER NO. 1 W–B E3 JUNCTION BR MODULE
W–B E3W–B W–B CONNECTOR W–B
IGNITION COIL AND W–B 14 BR DATA LINK
IGNITER NO. 2 W–B EA AA ID2 (SG) CONNECTOR 3
W–B BA
IGNITION COIL AND
IGNITER NO. 3 BR 14
IO1
IGNITION COIL AND
IGNITER NO. 4 BR (E01)
(E02)
W–B ENGINE CONTROL
MODULE

ENGINE CONTROL (ME01) W–B
MODULE (E03)

EB

BR 21 BR NAVIGATION ECU
IJ1 (* 2) RADIO AND PLAYER
BR MULTI DISPLAY
(* 2)
BR
AIRBAG SENSOR W–B
ASSEMBLY (E1)

COMBINATION (ES) L7 6 BR
METER 2A 2B

IH IF

2001 PRIUS (EWD414U)

HYBRID VEHICLE (EOM) W–B EE W–B (E) LIGHT CONTROL
CONTROL ECU W–B (CG) RHEOSTAT

KEY INTERLOCK (KLS–) W–B EE GATEWAY ECU
SOLENOID

W–B E J21
JUNCTION
*1 : W/ DAYTIME RUNNING LIGHT
CONNECTOR *2 : W/ NAVIGATION SYSTEM

W–B J22 A , J23 B W–B PARK/NEUTRAL
JUNCTION CONNECTOR W–B POSITION SW

DE WIRELESS DOOR
BA CONTROL RECEIVER

HAZARD WARNING (TL) W–B DE
SW BA

W–B 11 W–B D E
A
BUCKLE SW AND IJ1 B
TENSION REDUCER LH

W–B

A/C AMPLIFIER W–B A A
W–B B A
UNLOCK (UN–) W–B A W–B (GND) GATEWAY ECU
WARNING SW W–B A A W–B
B A W–B
REMOTE CONTROL SW A (CG) DATA LINK
A A CONNECTOR 3
B A
SHIFT LOCK ECU CIGARETTE LIGHTER
A A W–B
B A

BUCKLE SW RH AND W–B 10 W–B A A 2 W–B DOOR LOCK MOTOR,
SEAT BELT WARNING A IG1 DOOR KEY LOCK AND
OCCUPANT DETECTION IJ1 B UNLOCK SW AND DOOR
SENSOR W–B UNLOCK DETECTION
SW FRONT LH
J24 A , J25 B
(E) BODY ECU
JUNCTION
CONNECTOR

W–B 8 IG1 RELAY
W–B 2D
AIRBAG SENSOR (E2) W–B
ASSEMBLY 3
2E

8
2K

W–B

J10 W–B
JUNCTION CONNECTOR W–B
A
TRANSPONDER W–B A A W–B A W–B FUEL PUMP AND
KEY COMPUTER W–B FUEL SENDER
W–B 1 W–B J11 A
POWER WINDOW W–B IC1 JUNCTION A EMPS ECU
MASTER SW (E) 5 W–B CONNECTOR
W–B IA1 A W–B POWER WINDOW
PTC HEATER (E) 1 W–B CONTROL SW REAR RH
IA1
A 1 W–B DOOR LOCK MOTOR AND
BB1 DOOR UNLOCK
A W–B B3 W–B

J17 DETECTION SW

DAYTIME RUNNING W–B JUNCTION REAR RH
LIGHT RELAY (* 1) CONNECTOR
W–B
(GND3) A A W–B 1 W–B POWER WINDOW
(GND4) W–B IQ1 CONTROL SW FRONT RH
BRAKE ECU
W–B (EL) COMBINATION SW
A W–B A A

ID IG

2001 PRIUS (EWD414U)

I GROUND POINT

REAR COMBINATION W–B CB W–B BATTERY MOTOR
LIGHT LH W–B BA W–B BLOWER CONTROLLER
W–B
LICENSE PLATE W–B CB PERSONAL LIGHT
LIGHT LH W–B BA

HIGH MOUNTED CB 1 W–B B1 W–B POWER WINDOW
STOP LIGHT BA BA1 CONTROL SW REAR LH

REAR COMBINATION J32 A , J33 B
LIGHT RH JUNCTION
CONNECTOR
LICENSE PLATE W–B
LIGHT RH W–B W–B DOOR LOCK MOTOR
W–B AND DOOR UNLOCK
W–B DETECTION SW
BK BI REAR LH

SYSTEM MAIN RELAY W–B BC W–B BATTERY FAN RELAY
W–B BA
LUGGAGE COMPARTMENT W–B W–B
DOOR UNLOCK SW B
BJ B
BATTERY ECU
B
B

J32 A , J33 B
JUNCTION
CONNECTOR

W–B A A W–B 7 DOOR LOCK MOTOR,
W–B AB W–B DOOR KEY LOCK AND
COMBINATION SW (E) W–B IQ1 UNLOCK SW AND DOOR
W–B
UNLOCK DETECTION
8 BC1
SW FRONT RH

COMBINATION SW (E) A A W–B 2 W–B DOOR LOCK CONTROL
AB IQ1 SW FRONT RH
A A W–B
TURN SIGNAL AB (ECC) COMBINATION
FLASHER RELAY SW

W–B A A W–B (GND1)
AB (GND2)
W–B HYBRID VEHICLE
A A W–B CONTROL ECU
AB

J18 A , J19 B
JUNCTION
CONNECTOR

W–B

BL

2001 PRIUS (EWD414U)

: PARTS LOCATION

Code See Page Code See Page Code See Page
J1 J17 J24 A
J7 37 J18 A 37 J25 B 37
37 J19 B 37 J32 A 37
J8 A 37 J21 37 J33 B 38
J9 B 37 J22 A 37 38
37 J23 B 37
J10 37 37
J11

: RELAY BLOCKS

Code See Page Relay Blocks (Relay Block Location)

2 23 Engine Room R/B No.2 (Right Side of Reserve Tank)

3 24 Engine Room R/B No.3 (Engine Compartment Right)
,,,,,,,,, : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

Code See Page Junction Block and Wire Harness (Connector Location)

1K 27 Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)

2A

2B Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D 30

2E

2K 31 Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

Code See Page Joining Wire Harness and Wire Harness (Connector Location)
IA1 42 Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IC1 42 Front Door LH Wire and Cowl Wire (Left Kick Panel)
ID2 42 Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IG1 42 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IJ1 44 Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
IO1 44 Engine Wire and Cowl Wire (Right Kick Panel)
IQ1 44 Front Door RH Wire and Cowl Wire (Right Kick Panel)
BA1 46 Rear Door No.2 Wire and Floor Wire (Center Pillar LH)
BB1 46 Rear Door No.1 Wire and Cowl Wire (Center Pillar RH)
BC1 46 Cowl Wire and Fuel Tank Wire (Near the Fuel Tank)

: GROUND POINTS

Code See Page Ground Points Location
EA
EB 40 Engine Block
EC
ID 40 Engine Compartment Left
IE
IF 42 Cowl Side Panel LH
IG
IH 42 Left Kick Panel
BI 42 Cowl Side Panel RH
BJ 42 Right Kick Panel
BK 46 Left Side of Rear Pillar
BL 46 Right Side of Rear Pillar
46 Back Panel Center
46 Near the Fuel Tank

2001 PRIUS (EWD414U)

I GROUND POINT

: SPLICE POINTS

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points
E1 40 Engine Room Main Wire B1 46 Rear Door No.2 Wire
E3 40 Engine Wire B3 46 Rear Door No.1 Wire
E5 40 Engine Room Main Wire

2001 PRIUS (EWD414U)

MEMO

2001 PRIUS (EWD414U)

J POWER SOURCE (Current Flow Chart)

2001 PRIUS (EWD414U)