Toyota 4Runner 2003 User Manual

Power Source

B- R

10A MI R HEATER

2

12

30A DEFOG

12

B- L

2

Y- G

2

Y- R

B- R

W- B

B

B- Y

DEFOG Relay

2

2

3

2

2

30A TOWING BRK

2

30A BATT CHG 50A AM1

21 W- L

2

1

2

5

4

12

12

12

12

12

12

12

15A AC1 15V I NV

12

R

50A HEAT ER

50A AI R SUS

50A J/B

40A TOWING

10A STOP

R

2

L- Y

L- W

L

G- W

V

L- Y

BR- Y

1

1C

2

2

2

2

2

2

12

22

10A AIRSUS NO. 2

4

4

5

1

AIR SUS Relay

10A SECU /HORN

30A P P/SEAT

30A D P/SEAT

12

30A POWER

5

1

3

2

3

2

GR

L- B

4

W- B

4

10A TAIL

R

58

140A ALT

1212

2

2

2

BB

Battery

15A FR FOG

12

7. 5A OBD

IG Relay

5

1

3

2

2

2

B- Y

2

W- B

2

Y- R

2

2003 4RUNNER (EWD514U)

TAIL Relay

LG

15A PWR OUTLET

O

25A SEAT HEATER

12

22

LG

2

2

HEATER Relay

1

5

4

2

2

3

2

2

W- G L

B- Y

W- B

7. 5A HEATER NO. 2

12

22

W- L

G- YR

2

AM1

I18
Ignition SW

ACC

IG1

3

4

W- G

L- Y

W- L

W

W- G

B- R

7. 5A ALT- S

21

2

10A HORN

21

2

15A A/F HEATER

21

2

30A AM2

12

40A ABS MTR

1

50A ABS SOL

12

Short Pin

12

20A EFI

12

10A ETCS

12

20A DR/LCK

12

20A TOWING

12

2

2

Y- B

2

2

2

2

2

G- W

2

2

GR

GR

7

R

Y

W

L

AM2

10A HEAD(HI RH

12

10A HEAD(HI LH

2

12

IG2

ST2

6

8

)

)

B- R

G- B

W

L

R- W

2

R- L

2

B- Y

15A TRN- HAZ

21

2

20A RADIO NO. 2

12

HEAD Relay

5

1

3

2

W- L

2

2

2

2003 4RUNNER (EWD514U)

10A HEAD(LO RH

R- B

R- B

W

2

12

10A HEAD(LO LH

12

)

R- B

2

)

R- Y

2

59

Power Source

7. 5A ACC

W- G

L- Y

B- R

G- B

W- G

5

1D

2

1C

6

1D

3

1D

10A CIG

15A IG1

10A ECU- IG

15A RR WSH

20A 4WD

30A FR WIP- WSH

10A I GN

7. 5A GAUGE

10A SRS

7. 5A STA NO. 2

10A DOME

12

2

R

20A RAD IO NO. 1

W

L

W- G

L

2

2

2

12

10A EC U- B

12

EFI Relay

1

5

2

2

3

22

L- Y

2

W- R

2

W- B

10A EF I NO. 2

BL-W

(

)(

2UZ- FE

12

2

2UZ- FE

)

60

2003 4RUNNER (EWD514U)

Service Hints

HEAD Relay

5-3 : Closed with light control SW at HEAD position or dimmer SW at FLASH position

Closed with engine running and parking brake lever released (w/ daytime running light)

I18 Ignition SW

2-3 : Closed with ignition key at ACC or ON position
2-4 : Closed with ignition key at ON or ST position
7-6 : Closed with ignition key at ON or ST position
7-8 : Closed with ignition key at ST position

TAIL Relay

3-5 : Closed with light control SW at TAIL or HEAD position

: Parts Location

Code See Page Code See Page Code See Page

I18 37

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

4 23 Engine Room R/B No.4 (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1C

1D

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

2003 4RUNNER (EWD514U)

61

Starting

78AM2 IG2

ST2

G- B

* 1 : 2UZ- FE
* 2 : 1GR-FE
* 3 : 1GR- FE Cold Area Spec.
* 4 : 1GR- FE Except Cold Area Spec.

7. 5A
STA
NO. 2

(*1)
(*2)

G- BL- Y

1D3

1K2

L- Y

(*1)

IM26

(*2)

IM24

I18
Ignition SW

E 6

RRB

2

2

30A
AM2

1

2

R

R

B- Y

22

51

STA Relay

32

22

Y- G

W- B

(*1)

EA16

(*2)

EA14

)
*1

(

Y- G

B- YB- Y

GG

J35

Junction

Connecto r

G

B- Y

)
B

BB

(

Combination Meter

, J 3

)
A

(
J 2

Junction

Connect or

AB

)

Y

*2

(

B- Y

IM111IC4D2

B- Y

P

N

P 1

Park/Neutral

Position SW

B- Y

(*1)

D

(*2)

A

J28

Junction

Connecto r

D
AA

B- Y

6

9

PP

(*1)

A

(*2)

D

D

62

Battery

B- L

(*3)

B- R

(*1)

W

(*4)

1

S 2(A), S 3(B
Starter

J28

Junction

Connect or

B1

MA

)

W- B

EB

A

A16 B9A17 C12

NSW STAR STA STSW

E 4(A), E 5(B), E 6(C
Engine Control Module

(*1)

A

(*2)

DD

P

B- Y B- Y

)

2003 4RUNNER (EWD514U)

Service Hints

I18 Ignition SW

7-8 : Closed with the ignition SW at ST position

S2 (A), S3 (B) Starter

Points closed with the shift lever at P or N position and the ignition SW at ST position

: Parts Location

Code See Page Code See Page Code See Page

E4 A 37

E5 B 37

E6 C 37 J28 38

I18 37 J35 38

J2 A

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

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

1D 24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1K 25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

33 (2UZ-FE)

35 (1GR-FE)

:

Relay Blocks

:

Junction Block and Wire Harness Connector

J3 B

P1

33 (2UZ-FE)

35 (1GR-FE)

33 (2UZ-FE)

35 (1GR-FE)

S2 A

S3 B

33 (2UZ-FE)

35 (1GR-FE)

33 (2UZ-FE)

35 (1GR-FE)

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IM1

IM2

Code See Page Ground Points Location

EB

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E6 44 (2UZ-FE) Engine Room Main Wire E6 46 (1GR-FE) Engine Room Main Wire

44 (2UZ-FE)

46 (1GR-FE)

52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

:

Ground Points

44 (2UZ-FE)

46 (1GR-FE)

:

Splice Points

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

Front Left Fender

2003 4RUNNER (EWD514U)

63

Ignition (2UZ-FE)

76AM2 IG2

I18
Ignition SW

R RB

B- R

ST2

EA14

B- RB- R

EB16

B- R B- RB- R

E 5

B- R

14 14 14

B- R

W- B

E 2

E 5

W- B

E 3 E 3

B- R

W- B

B- R

E 2

B- RB- R

W- B

B- R

B- R

W- BW- B

E 3

W- B

41

I 1

Ignition Coil and

2

2

30A
AM2

1

2

Battery

Igniter No. 1

32 32 32

LG

LG

924 823 25 11

IGT1

R- Y

E 3

R- Y

I 2

Ignition Coil and

Igniter No. 2

LG- B

LG- B

IGT2

R- W

E 3

R- W

IGF2

E 4
Engine Control Module

R- YR- Y

R- W

I 3

Ignition Coil and

Igniter No. 3

L- W

L- W

IGT3IGF1

R- W

E 3

R- Y

R- W

I 4

Ignition Coil and

Igniter No. 4

IGT4

23

L- Y

L- Y

R- Y

R- Y

E 3

R- W

64

2003 4RUNNER (EWD514U)

B- R B- R B- RB- R

E 2

E 2

B- R

R- Y

R- W

E 5

E 3

B- R

I 5

Ignition Coil and

Igniter No. 5

B- L

B- L

W- B

41

23

R- W

E 3

B- R

W- BW- B

R- Y

R- W

E 5

W- B

E 3

B- R

I 6

Ignition Coil and

Igniter No. 6

G

G

W- B

41

23

R- Y

E 3

R- Y

R- W

B- R

I 7

Ignition Coil and

Igniter No. 7

G- W

G- W

E 3

W- B

41

23

R- Y

B- R

W- B

E 3

B- R

I 8

Ignition Coil and

Igniter No. 8

G- B

G- B

W- B

41

23

R- W

W- B

W- B

B- R

)

2

Ignition No. 1

N 1

Noise Filter

(

1

BR

)

2

Ignition No. 2

N 2

Noise Filter

(

1

BR B- R

12 26 13 10

IGT5

IGT6

E 4
Engine Control Module

IGT7

2003 4RUNNER (EWD514U)

IGT8

EE

ED

EC

65

Ignition (2UZ-FE)

Service Hints

I18 Ignition SW

7-6 : Closed with the ignition SW at ON or ST position

: Parts Location

Code See Page Code See Page Code See Page

E4 37 I4 33 (2UZ-FE) I8 33 (2UZ-FE)

I1 33 (2UZ-FE) I5 33 (2UZ-FE) I18 37

I2 33 (2UZ-FE) I6 33 (2UZ-FE) N1 33 (2UZ-FE)

I3 33 (2UZ-FE) I7 33 (2UZ-FE) N2 33 (2UZ-FE)

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1 44 (2UZ-FE) Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

EB1 44 (2UZ-FE) Engine No.2 Wire and Engine Wire (Near the Starter)

:

Ground Points

Code See Page Ground Points Location

EC 44 (2UZ-FE) Right Bank Cylinder Head

ED 44 (2UZ-FE) Left Bank Cylinder Head

EE 44 (2UZ-FE) Rear Side of Right Bank Cylinder Block

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E2

44 (2UZ-FE) Engine Wire

E3

E5 44 (2UZ-FE) Engine Wire

66

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

67

Ignition (1GR-FE)

76AM2 IG2

I18
Ignition SW

R RB

B- R

ST2

1D6

1H4

B- RB- R

IM113

E 5 E 5

E12 E12

B- R

14 14 14

W- B

B- R

W- B

W- B

B- R

41

E12

W- B

B- R

W- BW- B

B- RB- R

W- B

E 5

B- R

I 1

Ignition Coil and

2

2

30A
AM2

1

2

Battery

Igniter No. 1

32 32 32

Y- R

Y- R

824 9 10 11

IGT1

W- R

E 9 E 9 E 9

W- R

I 2

Ignition Coil and

Igniter No. 2

P- L

P- L

IGT2

W- R

E 4
Engine Control Module

I 3

Ignition Coil and

Igniter No. 3

LG

LG

IGT3IGF

W- R

I 4

Ignition Coil and

Igniter No. 4

IGT4

23

LG- B

LG- B

W- R

W- RW- RW- RW- R

E 9

68

2003 4RUNNER (EWD514U)

B- R

E 5

B- R

E 5

E12

B- R

41

I 5

Ignition Coil and

Igniter No. 5

GR

W- R W- R

GR

12 13

IGT5

23

W- BW- B

W- B

W- R

E 9

E12

B- R

I 6

Ignition Coil and

Igniter No. 6

L

L

IGT6

W- B

41

23

W- R

W- B

W- B

B- R

)

2

Ignition No. 1

N 1

Noise Filter

(

1

W- B

E12

W- B

E 4
Engine Control Module

EF

69

2003 4RUNNER (EWD514U)

Ignition (1GR-FE)

Service Hints

I18 Ignition SW

7-6 : Closed with the ignition SW at ON or ST position

: Parts Location

Code See Page Code See Page Code See Page

E4 37 I3 35 (1GR-FE) I6 35 (1GR-FE)

I1 35 (1GR-FE) I4 35 (1GR-FE) I18 37

I2 35 (1GR-FE) I5 35 (1GR-FE) N1 35 (1GR-FE)

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1D 24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1H 25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IM1 52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

:

Ground Points

Code See Page Ground Points Location

EF 46 (1GR-FE) Rear Side of Left Bank Cylinder Block

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E5

46 (1GR-FE) Engine Wire

E9

E12 46 (1GR-FE) Engine Wire

70

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

71

Charging

ACC

2

W- L

W

2

W- L

2

2

1

2

140A A LT 50A AM1

1

2

B

22 2

R

R

22

AM1

7

I18
Ignition SW

W

IG1

IG2

ST2

4

L- Y

6AM2

B- R

B 4
Body ECU

)
B

(

, J19

)
A

(

J18

Junction

EA12
EA11

14

Connector

L

BE

AAAA

IC4D6

GR GR GR

EA15
EA13

B- R

L- Y

1D6

7. 5A
GAUGE

1G4

R- L

C15

)

D

(

Charge

, C1 1

)

C

(

C10

Combination Meter

D8

GR

BG
)
B

(

, J 9

)
A

(

AG
J 8

Junction

Connecto r

GR

1C2

15A
IG1

1E20

Y- RY- RY- R

E

Junction

Connecto r

E

D

J 1 J 1

Junction

Connector

D

(

2UZ- FE

(

1GR-FE

)

)

EA13
EA12

72

30A AM2

7. 5A ALT- S

11

2

B

Battery

W

GR

Y- R

B4B2B1A1

LIG B

S

IC Regulator

G 1(A), G 2(B
Gener ator

)

2003 4RUNNER (EWD514U)

Y- R

W

g()

Service Hints

G2 (B) Generator

(B) 1-Ground : 13.2-14.0 volts with the engine running at 5000 rpm and 115°C (239°F)
(B) 4-Ground : 0-4 volts with the ignition SW at ON position and the engine not running

: Parts Location

Code See Page Code See Page Code See Page

B4 36

C10 C 37

C11 D 37 I18 37 J18 A 38

G1 A

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

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

1C

1D

1E

1G 25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

32 (2UZ-FE)

34 (1GR-FE)

:

Relay Blocks

:

Junction Block and Wire Harness Connector

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

G2 B

J1

32 (2UZ-FE) J8 A 38

34 (1GR-FE) J9 B 38

33 (2UZ-FE) J19 B 38

35 (1GR-FE)

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

44 (2UZ-FE)

46 (1GR-FE)

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

2003 4RUNNER (EWD514U)

73

Engine Control (2UZ-FE)

AM1

76AM2

I18
Ignition SW

ACC

IG1

ST1

IG2

ST2

From Power Source Syste m (See Page 58

7. 5A
ACC

1K8

P

3EF

3EF

B- R

P

IC35

P

2

32

L

2

L

)

1

20A
EFI

2

2

L

L

W- G

22 22

15

L

B

B- O

51

W- G

W- G

L

B- R

B- O

B- W

ACC CUT

Relay

41

2

2

GR

RR

2

2

30A AM2

1

2

B

Battery

W- G

EFI Relay

23

22 22

W- B

B

J 2

Junction

Connect or

B

W- B

B

10A
EFI
NO. 2

B

E 6

B

2

1

2

2

L- W

A

J 4

Junction

Connect or

A

L- W

IC317

C/OPN Relay

32

B

A

L- W

B- W

B

IC4C3 IC4C15

B

GR- B

GR- B

GR- B

GR- B

B

L- W

L- W

74

EB

2003 4RUNNER (EWD514U)

EA1

1

B- R B- RB- R

EB1

3

B- R

W- G

W- G

L

B- R

B- O

B- W

B- W

22

23

FUEL PUMP

Relay

15

222

B- Y

G- R

IC4D5

G- R

IM219

G- R

B- R

P 1

Park/Neutral

W- G

B- R

I 2

L

B- R

61D

C

4

B- R

I 1

B- R

2

1

B- R

F 8

J 4

Junction

Connector

C

B- O B- O

B- O

2

IB1

B- R

4

M

F14

Fuel Pump

Resistor

Fuel Pump

5

W- B

BABA

)

B

(

, J41

)

A

(

J40

Junction

Connector

AA

W- B

10A
IGN

)
A

(

1J111E23

BA

J 8

Junction

Connector

BA

B- O B- O

W- B

IC4C4

L

E3E

BATT MREL

IGSW

9E E2

B- O

)
B

(

BB

, J32

)
A

(

J31

Junction

Connector

AB

B- O

W- G

IC4C17

W- G

8

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

FPR FC

G- R

IC316

W- G

IM25

W- G

15 A

ACCR

A33 E10

GR- B

Position SW

J28

B

)
B

(

, J32

)
A

(

J31

Junction

Connector

B

P

N

9

PP

A

Junction

Connector

A

16 A

NSWB9STAR

)

BABA

AC

+B2

B

6

STA Relay

B- Y

D

D

DA

P

B- Y B- Y

A17

STA

CCV+B

27 A1E

R- G

IM217

IE1C3

)

R- G R- GB

1

Canister Closed Valve

(

2

V10

VSV

GR- B

B

L- W

L- W

IB21

L- W

L- W

W- B

W- B

BLBO

75

2003 4RUNNER (EWD514U)

Engine Control (2UZ-FE)

B- R B- R B- R B- R B- R B- R B- R

Combinatio n Meter

R- L

PTNK

E21

O

E 3

B- R

1

I 9

Injector No. 1

2

A

A

A

R- L R- L

1A

#1

E 3

B- R

1

I10

Injector No. 2

2

L

J26

Junction

Connector

2#2A3

L- R

BR

E 3

B- R

1

I11

Injector No. 3

I12

2

W

A4

#3

VC

A18

L- RL- R

B

B

B

E 3E 3

B- R

1

Injector No. 4

2

Y

A5

#4

VTA1

A21

Y

J26

Junction

Connector

B- R

1

I13

Injector No. 5

2

G

A

#5

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

VTA2

A31

R- B

E 3

B- R

1

I14

Injector No. 6

2

R

3#6B

M+

C3

)

R

*1

(

E 3

B- R

1

I15

Injector No. 7

2

W

6#7C

)

GE01

M-

C17

C2

G

B- RBR

1

I16

Injector No. 8

2

5#8C

THW

A19

R- L

R- Y

2

I 1

Ignition Coil and

Igniter No. 1

LG

A9

IGT1

VG

W- R

I 2

Ignition Coil and

Igniter No. 2

E2G

A30

A29

B- W

R- Y

R- W

2

33

LG- B

A8

IGT2

THA

A20

Y- B

OO

IE1A10 IE1A16 IE1A17

BC2

10

O

231

PTNK VCC GND

V 8
Vapor Pressur e Sensor

L- R

L- R

BC28BC216

L- R

76

IM222IM27

BR

BR

BR

56421

T 2
Throt tle Con trol Motor

Throt tle Po sition Sensor

313

BR

I 8

2

1

E 2

Engine Coolant

Temp. Se nsor

BR

BRBRBR

I 8

18

IM2

542

M 1

Mass Air Flow

Meter

BR

I 8

THAE2GVGVC VTA1 VTA2 M+ M-

+BE2E2

L- W

BR

L- W

L- WL- W

2003 4RUNNER (EWD514U)

* 1 : Shielded

R- Y

R- W R- W R- W R- W

R- W

I 3

Ignition Coil and

Igniter No. 3

333333

L- W

A25

IGT3

PRG

A34

E2

A28

E 3

R- Y

I 4

Ignition Coil and

Igniter No. 4

L- Y

A11

IGT4

OX2A

B22

R- Y R- Y

R- W

222

I 5

Ignition Coil and

Igniter No. 5

B- L

A12

IGT5

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

HT2A

B33

R- Y

R- W

A13

E 3E 3E 3

R- W

2

I 8

Ignition Coil and

Igniter No. 8

MG CLT Relay

R- Y

A2423 A

IGF1

B- Y

D2

ACMG

LCKI

C23

G- B

A10

IGT8

OX2B

B21

R- W

IGF2

HT2B

B25

I 7

HT1A

E 3

R- Y

22

Ignition Coil and

Igniter No. 7

G- W

IGT7

)

B4

E 3

R- Y

I 6

Ignition Coil and

Igniter No. 6

G

A26

IGT6

OX1A

B23

BR

L- W

L- W

V 2

1

)

EVAP

(

VSV

2

)
*1

BR

Y- R

L- W

(

BR

I 8

L- W L- W

G

+B E1 +B E1 +B E1

24 24

L- W

L- W

E

E

E

J28
Junction
Connector

B- L

BR

I 8 I 8 I 8

E

L- W

E

L- WE

E

)
*1

(

)

Bank 2 Sensor 1

H 7

Heated Oxygen Sensor

(

I 9

R

OX HT OX HTHTOX

L- W

BR BR

LG

BR

)

*1

(

)

Bank 1 Sensor 1

H 5

Heated Oxygen Sensor

(

BR BRBR BRBR

W

313131

24

L- W

PBR

R- Y

)

A/C Lock Sensor

Bank 2 Sensor 2

H 8

Heated Oxygen Sensor

(

BR

(*1)

L- W

2003 4RUNNER (EWD514U)

77

Engine Control (2UZ-FE)

A24
Accel Position Sensor

VPA1 VPA2 VCP1 VCP2 EP1 EP2

634152

W- R

W- R

VPA

R- B

R- B

23 EE22

VPA2

B- Y

B- Y

E27

VCPA

W- L

W- L

E26

VCP2

LG- B

IC4C11 IC389IC3A8 IC4C13 IC4C16 IC4

LG- B

E28

EPAEEPA2

V- W

V- W

29

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

From Power Source System (See Page 58

11

7. 5A
STA
NO. 2

2

1K2

L- YL- Y

IM26

12 C

STSW

)

2

GRGR

IC4C5

6D

+BM

10A
ETCS

)

10A
STOP

2

2

G- W

2

S12

Stop Light SW

1

G- Y

E

J 4

Junction

Connector

E

G- Y

G- Y

3CB

3CB

G- Y

IC315

AH

)
B

(

, J32

)
A

(

BE

J31

Junction

Connector

G- Y

19 D

STP

BR

(*1)

BR

OX1B

)
*1

(

31

24

I 9

HT1B

B29

B

OX HT

+B E1

L- W

G- Y

BR

B5

)

Bank 1 Sensor 2

H 6

Heated Oxygen Sensor

(

BR

BR

NE+

)

L

*1

(

1

C 4

Crankshaf t

Position Sensor

2

NE-

C25

C24

Y

I 9

BR

C

C

C

C

)
*1

(

C 1

Camshaft

C

J28
Junction
Connector

G2+

B

1

Position Sensor

2

G2-

C27

C32

W

I 9

BR

BR

KNK2

B2

)

W

*1

(

(*1)

EB11EB14

)

W

*1

(

11

K 2

Knock Sensor 2

EB12

E 3

BR

BR

E 4

KNK1

B1

)

B

*1

(

)

B

*1

(

K 1

Knock Sensor 1

78

L- W

BR

EF

2003 4RUNNER (EWD514U)

* 1 : Shielded

GR- R

T 8
Transp onder Key
Computer

EFIO

6

W- R

)
B

(

, J32

)
A

(

J31

Junction

Connector

EFII

7

L- R

D27 4 D

26 D

IMO

THWO

ACLD

D14

BH

AE

L- B L- B

3DC

3DC

L- B

D33

B- R

IK14IK12IK13

B- R

F 9
4WD Control
ECU

24

)
B

(

J30

Junction

Connector

THE

D32

GR- G

GR- G

)

4WD

(

A32
Airbag Sensor
Assembly

GSW2

23

L

IL12

L

14 E

F/PS

W- B

)
B

(

, J34

)
A

(

J33

Junction

Connector

BCBC

R- Y

P- L

R- Y

)
B

(

AF

, J36

)
A

(

J35

Junction

Connector

BH

R- Y

E18

SILIMI

SPD TACH

D17

15 E1D

W- B

AB

5E E12

V- R

P- L

)
B

(

AE

, J30

)
A

(

J29

Junction

Connector

BA

P- L

20 E

TC

W

11 E

R- B

B- W

R- W

R- W

19 E

WFSE

ELSEOMHP4WDE1ME01E03E02E01

L- R

II14

L- R

15

ELS1

S 8(B), S 9(C
Skid Control ECU

L4

)

W- L

4WD

(

BH

BH

)

W- L

4WD

(

L4

NEO ENG+ ENG- TRC+ TRC-

C7C14 C22 C24 C16

P

17 E

NEO

A/CS

D31

BR- B

BR- B

)

R

24 E

ENG+

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

W- B

W- B

W

30 E

ENG-

7C6A7A 4C

W- B

B

25 E

TRC+

W- B

B16

SP1

Y

31 E

TRC-

)

8B1C

BR

BR

CC

J26

C

Junction
Connector

A7A18 B7B17

ACLDTWI

A16(A), A17(B
A/C Control Assembly

THE

)

ACS

B 4
Body ECU

BR

W- B

W- B

W- B

W- B

EE

EF

A

W- B

IK

J37
Junction
Connector

R- B

B- W

V- R

79

2003 4RUNNER (EWD514U)

Engine Control (2UZ-FE)

GR- R

R- Y

P- L

R- W

2

O

3C A

3CCC

P- L

HG

J18

Junction

Connecto r

HG

R- WBR

15 13 7 16

WFSE TC SIL BATT

SG CG

5

IM29

P- L

D 1
Data Link Connec tor 3

3A

A3A

R- Y R- Y

IC4C14

O

4

W- B

E

E

2

7. 5A
OBD

J22
Junction
Connector

From Power Sourc e Syste m (See Page 5 8

7. 5A
GAUGE

1G4

)
B

R- L

C15 C16

Malfunction

Indicator Lamp

)
C

(

, C10

)
B

(

, C 9

)
A

(

C 8

Combination Meter

A76BB5

4B

R- B

GR- R

(

, J 9

)
A

(
J 8

Junction

)
B

(

, J 9

)
A

(
J 8

Junction

Connector

)

11

10A
DOME

R

AH

Connector

BF

R

B- W

BC

AC

B- W

D

J 7

Junction

Connector

D

R

Speedometer

V- R

1G1

1K11

3DB

3DB

2

2

R

IC4C2

Tachomet er

C13

BR

IM17

80

R- B

B- W

V- R

BR

BR

W- B

W- B

A

J 5
Junction
Connector

IGEF

2003 4RUNNER (EWD514U)

)
B

(

AG

, J32

)
A

(

J31

Junc tion

Connector

BF

B- W

V- R V- R

)

B

(

AB

, J30

)

A

(

J29

Junc tion

Connector

BD

V- R

BR

EF

System Outline

The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outline
of the engine control is given here.

1. Input Signals

(1) Engine coolant temp. signal circuit

The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance which
varies according to the engine coolant temp. The engine coolant temp. is input into TERMINAL THW of the engine
control module as a control signal.

(2) Intake air temp. signal circuit

The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a
control signal to TERMINAL THA of the engine control module.

(3) Oxygen sensor signal circuit

The oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensors
to TERMINALS OX1A, OX1B, OX2A and OX2B of the engine control module.

(4) RPM signal circuit

The camshaft position is detected by the camshaft position sensor and is input into TERMINAL G2+ of the engine
control module as a control signal. Also, the engine RPM is detected by the crankshaft position sensor and the signal is
input into TERMINAL NE+ of the engine control module.

(5) Throttle position sensor signal circuit

The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALS
VTA1 and VTA2 of the engine control module.

(6) Vehicle speed circuit

The vehicle speed sensor detects the vehicle speed, and the signal is input into TERMINAL SPD of the engine control
module via the combination meter, from TERMINAL SP1 of the skid control ECU.

(7) Battery signal circuit

Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start up power supply is applied through the EFI relay, to TERMINALS +B and +B2 of
the engine control module. The current from the IGN fuse flows to TERMINAL IGSW of the engine control module, and
voltage is constantly applied to TERMINAL +BM.

(8) Intake air volume signal circuit

The intake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of the
engine control module.

(9) Stop light SW signal circuit

The stop light SW is used to detect whether the vehicle is braking or not, and the signal is input into TERMINAL STP of
the engine control module as a control signal.

(10)Starter signal circuit

To confirm whether the engine is cranking, the voltage applied to the starter motor when the engine is cranking is
detected, and is input into TERMINAL STA of the engine control module as a control signal.

(11) Engine knock signal circuit

Engine knocking is detected by the knock sensors, and is input into TERMINALS KNK1 and KNK2 of the engine control
module as a control signal.

(12)A/C SW signal system

The operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL A/CS
of the engine control module.

2003 4RUNNER (EWD514U)

81

Engine Control (2UZ-FE)

2. Control System

∗ SFI system

The SFI system monitors the engine condition through the signals input from each sensors to the engine control module.
The control signal is sent to the engine control module TERMINALS #1, #2, #3, #4, #5, #6, #7 and #8 to operate the
injector (Fuel injection). The SFI system controls the fuel injection by the engine control module in response to the driving
conditions.

∗ ESA system

The ESA system monitors the engine condition through the signals input from each sensors to the engine control module.
The best ignition timing is decided according to this data and the data memorized in the engine control module. The
control signal is output to TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 and IGT8, and these signals control the
igniter to provide the best ignition timing.

∗ Heated oxygen sensor heater control system

The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaust
emission is low), and warms up the heated oxygen sensors to improve their detection performance. The engine control
module evaluates the signals from each sensors, and outputs current to TERMINALS HT1A, HT1B, HT2A or HT2B to
control the heater.

∗ Fuel pump control system

The engine control module supplies current to TERMINAL FPR, and controls the operation speed of the fuel pump with
the FUEL PUMP relay.

∗ ACIS

The ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in
accordance with the driving conditions to control the intake manifold length in two stages, for increased engine output in all
ranges from low to high speeds.

∗ ETCS-i

The ETCS-i controls the engine output at its optimal level in accordance with the opening of the accelerator pedal, under
all driving conditions.

∗ Engine start control system

The engine control module allows power to be supplied from the TERMINAL STAR to the STA relay via park/neutral
position SW until complete combustion is confirmed by engine RPM after the detection of ignition SW ST signal by the
TERMINAL STSW.
With this arrangement, engine can be started without holding the ignition key in the ST position. At the same time, the
TERMINAL ACCR is controlled so that the engine control module turns off ACC CUT relay, shutting off power to the
accessories.

3. Diagnosis System

When there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in the
memory. The malfunctioning system can be found by reading the code displayed on the malfunction indicator lamp.

4. Fail-Safe System

When a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued control
based on that system. In that case, the fail-safe system either controls the system using the data (Standard values)
recorded in the engine control module memory, or else stops the engine.

82

2003 4RUNNER (EWD514U)

Service Hints

EFI Relay

5-3 : Closed with the ignition SW at ON position

E2 Engine Coolant Temp. Sensor

1-2 : Approx. 15.0 kΩ (-20°C, -4° F)

:Approx. 2.45 kΩ (20°C, 68°F)
:Approx. 0.32 kΩ (80°C, 176°F)
:Approx. 0.14 kΩ (110°C, 230°F)

E4 (A), E5 (B), E6 (C), E7 (D), E8 (E) Engine Control Module

BATT-E1 : Always 9.0-14.0 volts

+BM-E1 : Always 9.0-14.0 volts

IGSW-E1 : 9.0-14.0 volts with the ignition SW at ON position

+B, +B2-E1 : 9.0-14.0 volts with the ignition SW at ON position

VC-E1 : 4.5-5.5 volts with the ignition SW at ON position

VTA2-E1 : 2.0-2.9 volts with the ignition SW on and throttle valve fully closed

: 4.7-5.1 volts with the ignition SW on and throttle valve fully open

VTA1-E1 : 0.4-1.0 volts with the ignition SW on and throttle valve fully closed

: 3.2-4.8 volts with the ignition SW on and throttle valve fully open

VPA-E1 : 0.3-0.9 volts with the ignition SW on and throttle valve fully closed

: 3.2-4.8 volts with the ignition SW on and throttle valve fully open

VPA2-E1 : 1.8-2.7 volts with the ignition SW on and throttle valve fully closed

: 4.7-5.1 volts with the ignition SW on and throttle valve fully open

THA-E1 : 0.5-3.4 volts with the idling, intake air temp. 0°C (32° F) -80°C (176°F)

THW-E1 : 0.2-1.0 volts with the idling, engine coolant temp. 60°C (140°F) -120°C (248°F)

STA-E1 : 6.0 volts or more with the engine cranking

W-E1 : 9.0-14.0 volts with the idling and malfunction indicator lamp off

SPD-E1 : Pulse generation with the vehicle moving

STP-E1 : 7.5-14.0 volts with the brake pedal depressed

: Parts Location

Code See Page Code See Page Code See Page

A16 A 36 I2 33 (2UZ-FE) J28 38

A17 B 36 I3 33 (2UZ-FE) J29 A 38

A24 36 I4 33 (2UZ-FE) J30 B 38

A32 36 I5 33 (2UZ-FE) J31 A 38

B4 36 I6 33 (2UZ-FE) J32 B 38

C1 32 (2UZ-FE) I7 33 (2UZ-FE) J33 A 38

C4 32 (2UZ-FE) I8 33 (2UZ-FE) J34 B 38

C8 A 37 I9 33 (2UZ-FE) J35 A 38

C9 B 37 I10 33 (2UZ-FE) J36 B 38

C10 C 37 I11 33 (2UZ-FE) J37 38

D1 37 I12 33 (2UZ-FE) J40 A 40

E2 32 (2UZ-FE) I13 33 (2UZ-FE) J41 B 40

E4 A 37 I14 33 (2UZ-FE) K1 33 (2UZ-FE)

E5 B 37 I15 33 (2UZ-FE) K2 33 (2UZ-FE)

E6 C 37 I16 33 (2UZ-FE) M1 33 (2UZ-FE)

E7 D 37 I18 37 P1 33 (2UZ-FE)

E8 E 37 J2 33 (2UZ-FE) S8 B 39

F8 32 (2UZ-FE) J4 38 S9 C 39

F9 37 J5 38 S12 39

F14 40 J7 38 T2 33 (2UZ-FE)

H5 32 (2UZ-FE) J8 A 38 T8 39

H6 32 (2UZ-FE) J9 B 38 V2 33 (2UZ-FE)

H7 32 (2UZ-FE) J18 38 V8 41

H8 32 (2UZ-FE) J22 38 V10 41

I1 33 (2UZ-FE) J26 38

2003 4RUNNER (EWD514U)

83

Engine Control (2UZ-FE)

()

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1D

1G

3C

3D

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1 44 (2UZ-FE) Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

EB1 44 (2UZ-FE) Engine No.2 Wire and Engine Wire (Near the Starter)

IB1

IB2

IC3

IC4

IE1 50 Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)

IK1 50 Instrument Panel Wire and Instrument Panel Wire (Left Upper Side of the Glove Box)

IL1 50 Instrument Panel Wire and Instrument Panel Wire (Right Upper Side of the Glove Box)

IM1

IM2

BC2 54 Frame Wire and Floor No.2 Wire (Under the Rear LH Seat)

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1E

1J

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1K

3A

28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

3E

:

Connector Joining Wire Harness and Wire Harness

48 Floor No.2 Wire and Engine Room Main Wire (Left Kick Panel)

48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

II1 50 Instrument Panel Wire and Instrument Panel Wire (Instrument Panel Brace LH)

52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

:

Ground Points

Code See Page Ground Points Location

EB 44 (2UZ-FE) Front Left Fender

EE 44 (2UZ-FE) Rear Side of Right Bank Cylinder Block

EF 44 (2UZ-FE) Rear Side of Left Bank Cylinder Block

IG 48 Left Kick Panel

IK 48 Right Kick Panel

BL 54 Floor Seat Crossmember LH

BO 54 Rear Pillar LH

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E3 44 (2UZ-FE) Engine Wire I2 50 Engine Room Main Wire

E4 44 (2UZ-FE) Engine No.2 Wire I8

E6 44 (2UZ-FE)

I1 50

Engine Room Main Wire

50 Engine Wire

I9

84

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

85

Engine Control (1GR-FE)

AM1

76AM2

I18
Ignition SW

ACC

IG1

IG2

ST2

7. 5A
ACC

1K8

P

F3E

3EF

P

5IC3

P

22

32

From Power Source Syste m (See Page 58

15A
A/F HEATER

22

2

L

J 4
Junc tion
Connector

B

B- R

L

B- R

W- G

2

2

51

)

11

20A
EFI

2

B

B

L

W- G

22 22

15

L

B

B- O

51

W- G

L

B- R

B- O

B- W

ACC CUT Relay

41

22

GR

RR

2

2

30A AM2

1

2

B

Battery

W- G

A/F HEATER Relay

32

2

W

IC4C1

W

IM14

EFI Relay

23

2

W- B

22 22

B

W- B

B

B

J 2

Junction

B

W- B

Connect or

B

E 6

B

C/OPN Relay

32

B- W

B

IC4C3 IC4C15

B

GR- B

GR- B

GR- B

GR- B

B

B

W

W- G

86

EB

2003 4RUNNER (EWD514U)

B- R

W- G

L

B- R

B- O

B- W

B- W

22

23

FUEL PUMP

Relay

15

22 2

Y- B

B- Y

IC4D5

Y- B

IM219

Y- B

B- R

P 1

Park/Neutral

Position SW

IM15

L

B- R

1D61H3

C

4

F 8

Fuel Pump

J 4

Junction

Connector

C

B- O B- O

Connector

IB12

B- R

4

M

5

W- B

BABA

AA

W- B

B- O

F14

Fuel Pump

B- R

B- R

I 1

B- R

2

Resistor

1

)
B

(

, J41

)
A

(

J40

Junction

W- B

10A
IGN

)
A

(
J 8

B- R

IC4C4

L

E3E

BATT MREL

IGSW

1J111E23

AB

Junction

Connector

AB

B- O B- O

9E E2

B- O

BB

)
B

(

, J32

)
A

(

AB

J31

Junction

Connector

B- O

W- G

IC4C17

GR- B

P

B9

STAR

ACCR

A14

W- G

5IM2

W- GW- G

16 IC3

W- G

8

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

FPR FC

A33 E10

Y- B

P

N

D

16 A

9

PP

D

D

NSW

6

STA Relay

B- Y

A

A

STA

)

+B1

B

BABA

)

B

(

, J32

)

A

(

AC

J31

Junction

CA

Connecto r

B

A

J28

Junction

Connector

B- Y B- Y

A17

CCV+B

27 A1E

B

B

R- G

IM217

IE1C3

)

R- G R- GB

1

Canister Closed Valve

(

2

V10

VSV

GR- B

B

B

W

W- G

IB21

B

W

B

BLBO

87

2003 4RUNNER (EWD514U)

Engine Control (1GR-FE)

B- R B- R B- R B- R B- R

Combinatio n Meter

R- L

E 8

B- R

2

I 9

Injector No. 1

1

D

D

D

R- L R- L

1A

#10

E 8

B- R

2

I10

Injector No. 2

1

B

J27

Junction

Connector

2

A3

#20

E 8

B- R

2

I11

Injector No. 3

I12

1

R

A4

#30

B- R

2

Injector No. 4

1

G

A5

#40

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

From Power Source System (See Page 58

7. 5A
STA

E 8E 8

B- R

2

I13

Injector No. 5

1

Y

A

#50

B- RL

2

I14

Injector No. 6

1

3

B

#60

)

NO. 2

1K2

L- Y

IM24

L- Y

C12

STSW

)

2

1

C 3

Camshaft Timing Oil

Control Valve RH

G- Y

C16 C14C15 C13

OC1+ O C1- O C2+ OC2-

L- B

2

1

C 2

Camshaft Timing Oil

Control Valve LH

L- W

L- R

PTNK

E21

O

IM222IM27

OO

IE1A10 IE1A16 IE1A17

BC2

10

O

231

PTNK VCC GND

V 8
Vapor Pressur e Sensor

L- R

L- R

BC28BC216

L- R

BR

BR

BR

L- R

BR

VC

A18

L- RL- R

B

B

B

56421

T 2
Throt tle Con trol Motor

Throt tle Po sition Sensor

VTA1

J27

Junction

Connector

VTA2

A21

G- B

A31

G- W

M+

C3

)

P

*1

(

M-

C2

L

351

BR

E 8

GE01

C17

VG

E2G

THW

A19

B- L

2

1

E 2

Engine Coolant

Temp. Se nsor

BR

BRBRBR

E 8

A30

R- Y

324

M 1

Mass Air

Flow Meter

BR

E 8

THA

A29

A20

R- B

R- W

THAE2GVGVC VTA1 VTA2 M+ M-

+BE2E2

B

BR

88

12

IM1

2003 4RUNNER (EWD514U)

WW

B

E13

BB

* 1 : Shielded

R- Y

C23

LCKI

A/C Lock Se nsor

ACIS

A15

W- RW- RW- R

E 9

W- R

2

I 1

Ignition Coil and

Igniter No. 1

3

Y- R

A8

IGT1

EVP1

A34

W- R

2

I 2

Ignition Coil and

Igniter No. 2

33333

P- L

A9

IGT2

E2

A28

AFL+

B23

W- R

I 3

Ignition Coil and

Igniter No. 3

LG

A10

IGT3

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

AFL-

B31

W- R

I 4

Ignition Coil and

Igniter No. 4

LG- B

A11

IGT4

)

HAFL HAFR

AFR+

B22

E 9E 9E 9

W- R

222

I 5

Ignition Coil and

Igniter No. 5

GR

IGT5

AFR-

B30

W- R W- R

A12

B5B4

E 9

W- R

2

I 6

Ignition Coil and

Igniter No. 6

MG CLT Relay

L

A13

IGT6

OX2B

B29

W- R

IGF

A24

HT2B

B- Y

D2

ACMG

B33

)
*1

BR

G- Y

2

)

ACIS

(

V 1

VSV

1

BW-L

BR

W

B

E13 E13 E13

2

)

EVAP

(

V 2

VSV

1

B

BB B

(

BR

E 8

Y

+B HT + B HT + B E 1

21 21

W

W

A

AA W

BR

J27
Junction
Connecto r

)

*1

(

B- W

)

Bank 2 Sensor 1

A13

Air Fuel Ratio Sensor

(

I 9

P

AF+ AF- OX HTAF-AF+

W

BR BR

L

R- L

)

Bank 1 Sensor 1

A12

Air Fuel Ratio Sensor

(

)

*1

(

B

313434

24

B

LBR

)

Bank 2 Sensor 2

H 8

Heated Oxygen Sensor

(

BRBR

BR

E 8

(*1)

B

2003 4RUNNER (EWD514U)

89

Engine Control (1GR-FE)

A24
Accel Position Sensor

VPA1 VPA2 VCP1 VCP2 EP1 EP2

634152

W- R

W- R

VPA

R- B

R- B

23 EE22

VPA2

B- Y

B- Y

E27

VCPA

W- L

W- L

E26

VCP2

LG- B

IC4C11 IC389IC3A8 IC4C13 IC4C16 IC4

LG- B

E28

EPAEEPA2

V- W

V- W

29

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

A32
Airbag Sensor
Assembly

GSW2

23

L

IL12

L

14 E

F/PS

)

From Power Sourc e Syste m (See Page 5 8

11

2

2

GRGR

IC4C5

6D

+BM

10A
ETCS

S12

J 4

Junction

Stop Light SW

Connector

10A
STOP

2

2

G- W

2

1

G- Y

E

E

G- Y

)

G- Y

3CB

3CB

G- Y

IC315

AH

)
B

(

, J32

)
A

(

BE

J31

Junction

Connector

G- Y

19 D

STP

BR

(*1)

BR

OX1B

)

*1

(

31

42

I 9

B

HT1B

B21

W

OX HT

E1 +B

BR

G

B

BR

BR

B25

H 6

Heated Oxygen Sensor

J28
Junction
Connect or

F

F

F

BR

J27
Junction
Connect or

E1

C1

)

Bank 1 Sensor 2

(

BR BR

CC

VV1+

C27

)

R

*1

(

1

V 4

VVT Sensor

RH

2

G

BRC

NE-

W

)

W

*1

(

2

1

C 4

Cranks haft

Position Sensor

NE+

C24

I 9

C25

BR

BR

EE

)
*1

(

I 9

2

V 3

VVT Sensor LH

1

B

I 9

BR

VV2+

C26

(*1)

L

Y

I 9

BR

90

2003 4RUNNER (EWD514U)

From Power Source Syste m (See Page 5 8

)

* 1 : Shielded

10A
TAIL

B

B

1L5

G

G

3DD

3DD

J16
Junction
Connector

G

ADAI

BIBD

G

E13 E12

ELS2 ELS

Y- G

30A
DEFOG

D

Y- G

J31(A), J32(B
Junction
Connect or

1

2

2

Y- GY- G

IC4C10

D

)

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

J22

Junction

Connect or

F 9(A), F10(B
4WD Control ECU

)

B

(

J30

Junction

Connector

4D

)

L4

W- L

BH

J28

BH

)

W- L

4WD

(

L4

Junction

ADD

E

Connector

E

8B

4WD

)

GR

GR

A11
ADD Actuator

ADD

3

24 E

ENG+

)

R

W

30 E

ENG-

B16

SP1

B

25 E

TRC+

S 8(B), S 9(C

GRGR

B18A24

EC16

E

)

4WD

(

Skid Control ECU

NEO ENG+ ENG- TRC+ TRC-

C7C14 C22 C24 C16

P

17 E

NEO

GR- R

Y

31 E

TRC-

)
*1

(

(*1)

)
*1

(

EKN2

B20

RR

KNK2

B2

G

E10

ED14ED16

G

22

ED11

E11

K 2

Knock Sensor

2

BR

BR

K 1

)

*1

(

)

*1

(

Knock Sensor

KNK1

B1

B

ED12ED15

B

1

11

EKNK

B28

W

W

)
B

(

, J32

)
A

(

J31

Junction

THWO

Connector

ACLD

D14

BH

AE

L- B L- B

3DC

3DC

L- B

A7A18 B7B17

A16(A), A17(B
A/C Control Assembly

D33

B- R

IK14IK12IK13

B- R

ACLDTWI

)

THE

GR- G

GR- G

THE

A/CS

D32

D31

BR- B

BR- B

ACS

7C6A7A 4C

W- B

W- B

W- B

W- B

W- B

W- B

W- B

W- B

E05E04ME01E0 3E02E01

6B7B

W- B

W- B

W- B

W- B

2003 4RUNNER (EWD514U)

EF

EE

91

Engine Control (1GR-FE)

GR- R

T 8
Trans ponder Key
Computer

EFIO

6

W- R

D27

IMI

EFII

7

R- Y

AF

)
B

L- R

26 D

IMO

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E
Engine Control Module

(

, J36

)
A

(

BH

J35

Junction

Connector

R- Y

E18

SIL

From Po wer Source Syste m (See Page 58

1

7. 5A
OBD

2

2

R- Y

P- L

3C A

P- L

AE

)

B

(

, J30

)

A

(

BA

J29

Junction

Connector

P- L

20 E

TC

)

R- W

19 E

WFSE

R- W

3CCC

P- L

J18

Junction

Connector

HG

R- WBR

15 13 7 16

WFSE TC SIL BATT

P- L

3A

A3A

GH

R- Y R- Y

O

IC4C14

O

)

SPD TACH

Connector

W- B

BCBC

EOMHP

15 E1D

W- B

AB

W- B

A

V- R

J37
Junction
Connector

5E

PSW

C10

G- W

1

P 2

Power Steering

Oil Press ure S W

)
B

(

, J34

)
A

(

J33

Junction

W

11 ED17

R- B

B- W

SG CG

D 1

5

Data Link
Connect or 3

IM29

BR

BR

E

E

A

4

W- B

W- B

W- B

J22
Junction
Connector

J 5
Junction
Connector

TAC

9

B- W

B- W

GR- R

R- B

B- W

V- R

92

IK

IGEF

2003 4RUNNER (EWD514U)

From Power Source System (See Page 58

)

1

7. 5A
GAUGE

R

1G4

AH

R- L

C15 C16

Malfunction

Indicator Lamp

)

C

(

, C10

)

B

(

, C 9

)

A

(

C 8

Combination Meter

A76BB5

4B

)
B

(

J 7

, J 9

)
A

(

BF

J 8

Junction

Connector

R

Junction

10A
DOME

2

2

D

Connector

D

R

Speedometer

R

IC4C2

Tachomet er

C13

B- W

GR- R

R- B

B- W

V- R

R- B

GR- R

B- W

BC

)
B

(

, J 9

)
A

(
J 8

Junction

AC

AC

B- W

B- W

AG

)
B

(

, J32

)
A

(

BF

J31

Junction

B- W

V- R

1G1

1K11

Connector

3DB

3DB

V- R V- R

AB

)
B

(

, J30

)
A

(

BD

Connector

J29

Junction

V- R

BR

IM17

Connector

BR

2003 4RUNNER (EWD514U)

EF

93

Engine Control (1GR-FE)

()

: Parts Location

Code See Page Code See Page Code See Page

A11 34 (1GR-FE) I1 35 (1GR-FE) J31 A 38

A12 34 (1GR-FE) I2 35 (1GR-FE) J32 B 38

A13 34 (1GR-FE) I3 35 (1GR-FE) J33 A 38

A16 A 36 I4 35 (1GR-FE) J34 B 38

A17 B 36 I5 35 (1GR-FE) J35 A 38

A24 36 I6 35 (1GR-FE) J36 B 38

A32 36 I9 35 (1GR-FE) J37 38

C2 34 (1GR-FE) I10 35 (1GR-FE) J40 A 40

C3 34 (1GR-FE) I11 35 (1GR-FE) J41 B 40

C4 34 (1GR-FE) I12 35 (1GR-FE) K1 35 (1GR-FE)

C8 A 37 I13 35 (1GR-FE) K2 35 (1GR-FE)

C9 B 37 I14 35 (1GR-FE) M1 35 (1GR-FE)

C10 C 37 I18 37 P1 35 (1GR-FE)

D1 37 J2 35 (1GR-FE) P2 35 (1GR-FE)

E2 34 (1GR-FE) J4 38 S8 B 39

E4 A 37 J5 38 S9 C 39

E5 B 37 J7 38 S12 39

E6 C 37 J8 A 38 T2 35 (1GR-FE)

E7 D 37 J9 B 38 T8 39

E8 E 37 J16 38 V1 35 (1GR-FE)

F8 34 (1GR-FE) J18 38 V2 35 (1GR-FE)

F9 A 37 J22 38 V3 35 (1GR-FE)

F10 B 37 J27 38 V4 35 (1GR-FE)

F14 40 J28 38 V8 41

H6 34 (1GR-FE) J29 A 38 V10 41

H8 34 (1GR-FE) J30 B 38

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1D

1G

1H

3C

3D

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1E

1J

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1K

1L

3A

28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

3E

94

2003 4RUNNER (EWD514U)

:

()

g

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EC1 46 (1GR-FE) Engine Wire and Differential Wire (Near the Front Differential)

ED1 46 (1GR-FE) Engine Wire and Sensor Wire (Rear Side of Right Bank Cylinder Block)

IB1

IB2

IC3

IC4

IE1 50 Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)

IK1 50 Instrument Panel Wire and Instrument Panel Wire (Left Upper Side of the Glove Box)

IL1 50 Instrument Panel Wire and Instrument Panel Wire (Right Upper Side of the Glove Box)

IM1

IM2

BC2 54 Frame Wire and Floor No.2 Wire (Under the Rear LH Seat)

Code See Page Ground Points Location

EB 46 (1GR-FE) Front Left Fender

EE 46 (1GR-FE) Rear Side of Right Bank Cylinder Block

EF 46 (1GR-FE) Rear Side of Left Bank Cylinder Block

BL 54 Floor Seat Crossmember LH

BO 54 Rear Pillar LH

48 Floor No.2 Wire and Engine Room Main Wire (Left Kick Panel)

48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

:

Ground Points

IG 48 Left Kick Panel

IK 48 Right Kick Panel

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E6 46 (1GR-FE) Engine Room Main Wire E11 46 (1GR-FE) Sensor Wire

E8 E13 46 (1GR-FE) Engine Wire

E9

E10

46 (1GR-FE) Engine Wire

I1 50 Engine Room Main Wire

I9 50 Engine Wire

95

2003 4RUNNER (EWD514U)

Engine Immobiliser System

1

2

1B4

1L4

3EB

3EB

W- R W- R W- R

GND

)

G

G

SIL

7

F

F

R- Y

R- Y

3AA

3AA

R- Y R- Y

D 1
Data Link
Connect or 3

J18
Junction
Connector

J35
Junction
Connector

10A
ECU- B

2

IND

3

From Power Source Syste m (See Page 58

10A
IGN

1J11

B- OB- OB- O

B

J 8
Junction
Connector

B

B

J31
Junction
Connector

B

21 9

EFIO

6

EFII

7

14

I17
Trans ponder Key Ampli fier

P- G

GR- B

KSW

10

GNDTXCTCODEVC5

7541

L

LG- R

1312118

AGNDTXCTCODEVC5D+BIG

CTY

4

T 8
Transponder Key
Computer

W- R

27 2 6

IMI

E 7
Engine Control
Module

L- R

IMO

W- B

B

J33
Junction
Connector

B

W- B

A

A

J37

Junction

Connector

IK

V- W

5

LP

GND

7

W- B

3FB

3FB3FB

W- B

Security
Indicator
Light

A

W- B

II

J24
Junction
Connect or

G- Y

AB

BC

G- Y

2

1

W- BW- B

BA

BA

A

IG

)

B

(

, J15

)

A

(

J14

Junction

Connect or

K 3
Unlock
Warning SW

)

B

(

J15

Junc tion

Connector

J 5
Junction
Connecto r

R- B

F

J18D 3
Junction
Connector

F

R- B

1

D12
Door Courtesy S W
Front LH

96

2003 4RUNNER (EWD514U)

()

Service Hints

T8 Transponder Key Computer

1-Ground : Always approx. 12 volts

14-Ground : Always continuity

2-Ground : Approx. 12 volts with ignition SW at ON position

: Parts Location

Code See Page Code See Page Code See Page

D1 37 J8 38 J33 38

D3 37 J14 A 38 J35 38

D12 40 J15 B 38 J37 38

E7 37 J18 38 K3 39

I17 37 J24 38 T8 39

J5 38 J31 38

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1B 24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1L

3A

3E

3F

28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

:

Ground Points

Code See Page Ground Points Location

IG 48 Left Kick Panel

II 48 Instrument Panel Brace RH

IK 48 Right Kick Panel

2003 4RUNNER (EWD514U)

97

Multiplex Communication System (Communication Bus)

MPX3 MPX2

C26 A23

BR- Y

B

J19
Junction
Connector

B

BR- Y

31

MPX1 MPX2

T 5
Theft Deter rent
ECU

BR- RBR- RR

IE1A14

BD19

1

B 4(A), B 6(C
Body ECU

B 8
Back Door
ECU

)

98

2003 4RUNNER (EWD514U)

Multiplex Communication System Includes Following Systems

∗ Automatic Light Control

∗ Door Lock Control

∗ Front Fog Light

∗ Garage Door Opener

∗ Headlight

∗ Interior Light

∗ Key Reminder

∗ Light Auto Turn Off

∗ Mirror Heater

∗ Power Window

∗ Rear Window Defogger

∗ Rear Wiper and Washer

∗ Seat Belt Warning

∗ Theft Deterrent

∗ Wireless Door Lock Control

2003 4RUNNER (EWD514U)

99

Multiplex Communication System

From Power Source System (See Page 58

1

50A
J/B

2

2

L- W

1

20A
DR/LCK

2

2

)

7. 5A
ACC

G- W

15A
RR
WSH

WIG

1

ACC BDR1

12

1E9

B 4(A), B 5(B), B 6(C
Body ECU

CLTB CLTE

622C

L- Y

IG13IG12IG11

L- Y

1

CLTB

A39
Automatic Light
Control Sensor

)

CLTS

C21 4 C

G- W

G- W

34

CLTE

Y

Y

CLTS

L- W

100

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

L- W

TRLY

18

32

TAIL Relay

51

11C

L- W

HRLY HF2

17

1B8

W

C20

R- B

R- B

22

1111

10A
HEAD
(

)

LO LH

W

IC4A1

2222

)

R- Y

Low

(

2212

H 2

Headlight LH

1

W- B

H 4

10A
HEAD
(

)

LO RH

)

R- B

Low

(

Headlight RH

W- B

H 1

10A
HEAD
(

)

HI LH

)

R- L

High

(

Headlight LH

1

R- GR- G

R- L

10A
HEAD
(

)

HI RH

2222

R- W

R- W

IC4A4

W

W

R- B

2

2

23

15

2

B

Battery

HEAD
Relay

R- B

E 7

W- B

EB

IC4A5

R- W

R- W

R- L

R- G

W- B

W- B

2003 4RUNNER (EWD514U)

101

Multiplex Communication System

R- W

B 4(A), B 5(B), B 6(C
Body ECU

C12
Combination SW

OFF

Tail

Head

Light

Contr ol SW

Auto

Low

2

1

R- GR- G

IN110

)

High

H 3

Headlight RH

(

Fog

High

Dimmer SW

Flash

OFF

Light

SW

ON

)

HEAD TAI L A HF

R

IH11IH110

R

G- R

17

L

J12(A), J13(B
Junction Connector

C8

G

IH18

G

C3C1

G- O

G- O

W- B

)

C7

R- W

IH19

I 5

R- W

81216141310

711

R- G

BB

W- B

BA

)
B

(

J15

Junction

Connector

BA

W- B

IC3

2

W- B

R- L

G- R

CACA CA

)
B

(

, J11

)
A

(

J10

BA

BB

Junc tion Connect or

R- G

R- G

R- W R- W

R- L

R- G

W- B

W- B

R- G

102

2003 4RUNNER (EWD514U)

R- G

W- B

W- B

W- B

W- B

B 4(A), B 5(B), B 6(C
Body ECU

)

PWS

From Power Source Syste m (See Page 58

1

R- L

R- L

22

25

13

22

G- R

)
B

BB

(

, J 3

)
A

(
J 2

Junction

Connector

AB

W- B

R- W

R- G R- G

W- B

W- B

W- B

W- B A

E 7

F 1

W- B

W- B

15A
FR FOG

2

2

LG

FR FO G
Relay

G

I 3

G

2

Front Fog Light LH

1

W- B

E 1

W- B

EA

G

2

F 2

Front Fog Light RH

1

W- B

)

1

30A
POWER

2

1F2

L- O

1J25 1H11A11H21A7

L- O

21

15

POWER Relay

23

W

M 5

Moon Roof Control ECU

W- B

L

4

PWS

16

W- B

32 32

I20

Interior Light

W- B

A

J 5
Junction
Connect or

IG

GND1GND2

4

B 3

W

WW

OFF

ON

DOOR

1

W

L 2

ILE

13

1A8

W

B 3

W

W

ON

OFF

DOOR

Luggage Compartment Light

1

W

B 3

W

W

L- O

L- O

W- B

R- W

W- B

W- B

W

2003 4RUNNER (EWD514U)

103

Multiplex Communication System

B 4(A), B 5(B), B 6(C
Body ECU

1A12 1A18 1K9

)

W

*1

W- B

E

B

P 7

Personal Light

R

V 6

(

W

(*1)

Vanity Light LH

)

W

*1

(

19 1A1A4

V 7

(*1)

Vanity Light RH

W

)

A15 B8B10 19 B 28 A

)(

L- RL- R

2UZ- FE

(

II14

)

2UZ- FE

R- G

6

I17

Ignition Key

Cylinder Light

2

221

R

115

ELS

E 8
Engine Control
Module

)
B

(

R

, J13

)
A

(

J12

E

Junc tion

Connector

BC

* 1 : w/ Vanity Light
* 2 : Limited

J 6
Junction Connector

B- L

DOWN UP E

B 1
Back Door Power
Wind ow Co ntrol SW

ABAB

Y- R

R

B- Y

13612

J35
Junction Connector

HHHH

IDLCOMBUPBDNEL S1

)

G

2UZ- FE

(

Illumination Lights

R

R

)

R(*2

1A91E61J22

W

W

L- O

L- O

W- B

R- W

R- G R- G

W- B

W- B

W

R- W

R

E

104

2003 4RUNNER (EWD514U)

W

L- O

L- O

W- B

R- W

W- B

W- B

R- W

B 4(A), B 5(B), B 6(C
Body ECU

)

25 A B22 B6A26 B21

)(
*2

(

W- RW- R

J20(A), J21(B
Junction
Connecto r

BC

Y

YR

1

2

D 9

Door Courtesy Light

Front RH

IP21BB19IA113 BA19

L- R

L- R

1

2

D11

Door Courtesy Light

Rear RH

R

ACAC

)
*2

IO110 IE1D4IP19BB18IA198BA1

)
*2

(

W- R

1

2

F13

Foot Light RH

)

R

*2

(

IO19IE1D3

)

W- G

)
*2

(

W- R

)
*2

(

W- R

1

2

F12

Foot Light LH

R

Y- G

1

2

D 8

Door Courtesy Light

Front LH

)(

R

*2

(

RDEFLCYLDCYLLPRCYLPCYL

From Po wer Source Syste m
(

See Page 5 8

P- GP- G

1

2

D10

Door Courtesy Light

Rear LH

R

4

W- B

)

1

140A
ALT

2

51

32

222

B- R

Y- R

DEFOG Re lay

R

6

321B

R

)

*2

R

R

)

R(*2

J 6
Junction Connector

W

L- O

L- O

W- B

R- W

R- G R- G

W- B

W- B

R- W R- W

(

R

)

R

EEE

R

*2

R

Y- R

L- O

L- O

B- R

R- W

W- B

W- B

W

2003 4RUNNER (EWD514U)

105

Multiplex Communication System

B 4(A), B 5(B), B 6(C
Body ECU

3 8

From Power Source System (See Page 58

24 1E 14

Y- R

J 1
Junction
Connector

STOP LP CTRL

Relay

15A
IG1

10A

G- B

STOP

2 2

2

G- W

DE E

G- W

2

S12
Stop
Light SW

1

G- Y

E

J 4

Junction

Connect or

E

4

2

Y- R

2

15

23

2

2

)

)

11

15A
TRN- HAZ

1E20

Y- R

ED

Y- R

1J18

Y- R

A

A

Y- R

2

)
*3

(

B- Y

T 9

Turn Signal

J 7

Junction

Connect or

)(

WW

*4

(

IF110

)
*4

8

EHW

Flasher Relay

BEIG

)
*3

(

B- Y

)
B

(

IC4A2

, J23

)
A

(

J22

DB

Junction Connector

EA

DRLHAZSTP1

A27

1J

1210

)
B

(

, J21

)
A

(

J20

Junction Connector

HA AH

)
*3

(

LG- R

DRLHAZ

D 2

Daytime Ru nning Ligh t Relay

196

Y- R

BF

Turn Signal Flasher Relay

)
*3

(

)

W

*3

(

)

*3

(

W- B

G- Y

Y- R

W

L- O

L- O

B- R

R- W R- W

R- G

W- B

W- B

R- W

LG

G- B

)

*3

(

W- B

A

J 5

Junction

Connector

IG

Y- R

Y- R

Y- R

W

L- O

L- O

B- R

R- G

W- B

W- B

R- W

AW-B

106

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

* 3 : w/ Daytime Running Light
* 4 : w/o Daytime Running Light

Y- R

IM12

Y- R

A

P

B17

D 3
Defogger SW

3

P 1

Park/Neutral

1

IM18

Position SW

)

B

(

BD

, J19

)

A

(

J18

Junction Connector

AB

G- B G- B

Passenger Seat Belt
Warning Light
Security Indicator Ligh t

IG+

2

Y- R

GND

7

W- BW- B

DEFSW DIND

1

G- R

DFSW DIND

B

1

RR

PBEW

3

B5B

G

114

SIND

12

GR- G

LG

J25

Junction Connector

A

A

Y- R

Y- R

Y- R

W

L- O

L- O

B- R

R- W R- W

R- G

W- B

W- B

R- W

G- B G-B

J35 J 8(A
Junction
Connector

G- B

CC

AEAE

)

Junction
Connector

B3F

A

A

3FB

B3F

W- B

J37

Junction

Connector

IK

3CA

3CA

W

L- O

L- O

B- R

R- G

W- B

W- B

R- W

R

W- BW- B W- B

2003 4RUNNER (EWD514U)

107

Multiplex Communication System

GR- G

LG

B 4(A), B 5(B), B 6(C
Body ECU

10

B- R

From Power Sourc e Syste m (See Page 5 8

10A

ECU- IG

1J281F8

B- R

34 29 10 2

6IC3

P- GW- B P- G

1

10A
SECU/HORN

W- B

)

MPX3KSWSIG

26C14

)

IN12

1K10

31231

25

GR- G W- L

)

J20(A
Junction
Connector

AGAGAGAAAA

BR- B BR- B

1

T 1

T 5
Theft Deter rent ECU

Theft Deterrent

Horn

BR- B

1

SH-

)

J12(A
Junction
Connecto r

G- R

5

HORN

G- Y

J18(A), J19(B
Junction
Connector

B- R

3DA

3DA3EB

C

G- R

G- Y

BR- Y

BBBA

BA

)

BR- Y

MPX1KSW+B2

+B1IGINDEDSWH

W- R

3EB

BR- YG- Y

BB

AE

G- Y

)

B

(

AB

, J15

)

A

(

Junction

BC

2

1

Connector

K 3 J14

Unlock Warning SW

E 3

Engine Hood

Courtesy SW

4

W

L- O

L- O

B- R

R- W

W- B

W- B

R- W

R R

W- B

W- B

A

A

II

B- R

J24
Junction
Connector

B- R

B- R B- R

W- R

W- B G- Y

I 5

LG

B- R

B- R

W

L- O

L- O

B- R

R- W

R- GR- G

W- B

W- R

R- W

108

2003 4RUNNER (EWD514U)

H 9
Horn

(

High

)

)

GR- B

)

UD

452

B

10 IP2

W

C

C

11

H10
Horn

(

Low

)

J33
Junction
Connector

C

P13
Power Window Motor
Front RH

LL-B

P 9
Power Window Control
SW Front RH

W

M

R- B

9IP2

L- Y

J 7
Junction Connector

CW

12

13

SDSUB

R

IP25

C

CC

W

W

L- R

L- Y

W

W

LG

B- R

B- R

W

L- O

L- O

B- R

R- W

W- B

W- R

R- W

B 4(A), B 5(B), B 6(C
Body ECU

TOUT

A6

G- R

G- R

ACCAAC

J14(A
Junction Connector

LG

B- R

B- R

W

L- O

L- O

B- R

R- W

R- G R- G

W- B

W- R

R- W

R R

)

G- RG- R

SR5 Grade

(

)

SR5 Grade

(

)

From Po wer Source Syste m (See Page 58

1

10A
HORN

2

2

W- G

1E10

15

HORN
Relay

23

1D113 1K

G- R

GR- B

2003 4RUNNER (EWD514U)

109

Multiplex Communication System

L- R

L- Y

W

W

J22(A), J23(B
Junction
Connector

L- R

)

L- Y

W/L 1 W/L 2

C24

L- Y

L- Y

IA27IA212

R- B

5

BB1

C22

L- R

BCBB

AAAAABAB

L- R

R

W

B 4(A), B 5(B), B 6(C
Body ECU

PD PU B B2 BW RRU RRD

15

R

)

D17
Door Lock Control SW Front L H

Power Window Master SW

13 6 11 7 18 16

B

R- B

B

IA25

W

B

IA112 IA22

B- R

R

L- O

IA211 IA210

BB17BB16

G- B G- B

SU SD U D

P11
Power Window Control
SW Rear RH

R- L

G

G

L

1

M

P15

Power Window Motor

2

L- B

1325

B

4

W

Rear RH

LG LG

B- R

B- R

W

L- O

L- O

B- R

R- W

R- G R- G

W- B

W- R

R- W R- W

R R

110

2003 4RUNNER (EWD514U)

B- R

W

L- O

B- R

R- W

W- B

W- R

B 4(A), B 5(B), B 6(C
Body ECU

D17
Door Lock Control SW Front L H

Power Window Master SW

RLU RLD DD DU PLS2 VCC PLS GND E UL L

12 10 9 4 17 3 14 2 1 8 5

)

L

IA29IA26

BA17BA16

G- W G- W

SU SD U D D U PLS2 SSRB PLS E

Power Window Contr ol
SW Rear LH

LG

B- R

W

G

L

1

G- R

G- R

L

M

2

L- B

B

4

WW

5BA1

P14

Power Window Motor

L- B

Rear LH

P12P10
Power Window Motor Front LH

W- L

W- G

W- R

BR- B

6543211325

W- B

J38

B

Junction Connector

B

BB

W- BW- B

IA24

G- W

R- W

IA14IA15

L- W

L- O

R

LG

W- B

W- B

B- R

W- B

L- O

B- R

R- W

W- B

W- R

R- W

R

2003 4RUNNER (EWD514U)

L- O

B- R

R- W

R- GR- G

W- B

W- R

R- W

A

A

J 5
Junction
Connector

IG

111

Multiplex Communication System

L- W

L- O

L- W

J 6
Junction
Connector

B 4(A), B 5(B), B 6(C
Body ECU

19 1 5 20

1K151K

L- W

L- O

L- W

L- O

DA

L- O

R

L- O

)

D18
Door Lock Control SW
Front RH

Lock

Unlock

L

5IP1IP16

L- W

365DADA

B 1

W- B W- B

4IP2

L2UL1L1

1K3

L

IA16IA18IA213 IA17IA28

L

W- B

E

7

A12 A10 A21 A30

G

G

D16
Door Key Lock and Unlock SW Front LH

Door Lock Detection SW Front LH
Door Lock Moto r Front LH

L- B

B- R

LSWPLSWDACTDUL3

W- R

W

481109

B- W

L- R

B- W

LLSSRULULL

J37
Junction
Connector

W- B

W- B

R

LG LG

W- B

W- B

B- R

W- B

L- O

B- R

R- W

R- G R- G

W- B

W- R

R- W

AA

IK

W- B

W- B

B- R

W- B

W- B

L- O

B- R

R- W

W- B

W- R

R- W

R

112

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

23 24 5

)

ACTYACT+ ACT- L SR

B20

61L1L181L9

B- W

L- R

IP17IP27IP22

BW- B

EEE

W- B

LG LG

W- B

B- R

W- B

W- B

L- O

B- R

R- W

R- G R- G

W- B

W- R

R- W

R

B 1

W- B

L- B

B- R

D19 D20 D21
Door Lock Detect ion
SW Front RH

Door Lock Motor
Front RH

L- R

B- W

W

BA110 BA111 BA112

W

Door Lock Dete ction
SW Rear LH
Door Lock Motor
Rear LH

W- B

W- B

11 1L1L23

L- B

L- B

L- R

L- R

W

BB110 BB111 BB112

W

998

Door Lock Detection
SW Rear RH
Door Lock Moto r
Rear RH

W- BW- B

BB14BA14

10 1L1L221K151L16

L- B

L- B

L- R

L- R

R- GR- G

IC215

4416416417

DOORLULLSSRLULLSSRLULLSSR

S15
Suspension
Control ECU

W- B

W- B

B- R

L- O

B- R

R- W

W- B

W- R

R- W

R

2003 4RUNNER (EWD514U)

113

Multiplex Communication System

97

1B10 1B6

P- B

1

2

Y- B

W 3

Wireless Door

Lock Buzzer

B 4(A), B 5(B), B 6(C
Body ECU

B4B3

DD D

L- R

IE1A12 I E1A13 IE1A15

L- R

RDA PRG +B

1

W- BW- B

E

G- O

G- O

D 7
Door Control
Receiver

532

)

A3

J 7
Junction Connector

R

R

R

From Power Sourc e Syste m
(

See Page 58

)

1

10A
DOME

2

2

R

22

52

RR

IC31IC4C2

RR

R

B23 B24

BH

AF

R- B R- B

11

PCTYDCTYLMRYPRGRDABZR2BZR

R- Y

)
B

(

, J19

)
A

(

J18

Junction Connector

D12

Door Courtesy S W

D13

Front LH

Door Courtesy S W

Front RH

AAAAAA

)

B

(

, J41

)

A

BA

LG

W- B

W- B

B- R

R R

L- O

B- R

R- W

R- G

W- B

W- R

R- W

W- B

(

J40

W- B

Junction Connector

W- B

31

22

R- W

DOME
Relay

R

R

LG

W- B

W- B

B- R

W- B

L- O

B- R

R- W

R- G

W- B

W- R

W- B

114

W- B

W- B

BLBO

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

11 B B12 C12 C11 C15

P- BP- B

IE1A11 IO18

11

D14

Door Courtesy S W

Rear LH

R

LG

W- B

W- B

B- R

R

W- B

L- O

B- R

R- W

R- G

W- B

W- R

From Power Sourc e Syste m
(

See Page 58

P- L

7. 5A
GAUGE

P- L

D15

Door Courtesy S W

Rear RH

)

V- Y

1G4

Door

Driver’ s Seat Be lt

C15 C16 A14 A13 C13B13 B12

R- L

B13
Buckle SW RH

Occup ant D etecti on
Sensor

32

W- B

11 IO1 IM17

W- L

GR- B

GR- B

KSWODCY2DRLPRRCYRL CY

RR

BF

AH

SPD

14

S 8

1G1

V- G

AH

R

V- R

B5B19C8A17

Beam

B18

LG

R- W

)

B

(

, J 9

)

A

(

J 8

Junction

Connecto r

Skid Control
ECU

SP1

16

GR- R

B4

Speedometer

)

C

(

, C1 0

)

B

(

, C 9

)

A

(

C 8

Combinatio n Meter

BR

R- G

BRBR

G- Y

G- Y

W- B

W- B

B- R

W- B

L- O

B- R

W- B

W- R

W- B

BM

W- B

W- B R- L

EF

115

2003 4RUNNER (EWD514U)

Multiplex Communication System

DBKL

A13

G- YG- Y

J20(A), J21(B
Junction Connector

BB

ADAD

)

B

AF

(

, J 9

)

A

(

J 8

Junction Connector

BH

B 4(A), B 5(B), B 6(C
Body ECU

)

G- Y

IE1A8

G- YW- B

3

B12

Buckle SW LH

4

B- R

)

B- R

E 8
Engine Control

Y- G

BH17

Y- G

)

A1

B

(

, R22

)
A

(

R21

B1

W- B

BD14

Y- G B

Rear Window Defo gger

IE1B1

Y- G

Module

12

ELS

Y- G

Y- G

)(

1GR-FE

(

)
B

(

BD

, J32

)
A

(

J31

Junction

Connect or

AI

)

1GR- FE

2

11

30A
DEFOG

22

22

IC4C10 IC4D4

Y- G Y- G

ADADAD

B- L

10A
MIR HEATER

B- L

G- Y

W- B

W- B

B- R

W- B

L- O

B- R

W- B

W- R

W- B

10

BD1

BH13

W- B W- B

W- B W- B

B 6

J22(A), J23(B
Junction Connector

)

BE

Y- G

(

)

2UZ- FE

W- B

W- B

B- R

L- O

W- B

W- R

W- B

116

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

DEF PKB

A27

)

Y- G

2UZ- FE

(

J 6
Junction Connector

BB B

B- L

IA11818 IP1

G- B

4

Mirror Heater RH

M 3

5

W- B

B- L

B- L

B- L

G- B

4

M 4

5

W- B

B2

LGLG

1J17

1E1

1

P 4

Parking Brake SW

Mirror Heater LH

From Po wer Source Syste m
(

See Page 5 8

)

1

10A
ECU- B

2

2

BECU

11

1B41L41F12

W- R

W- R

W- R

Y- G

(

)

2UZ- FE

W- B

W- B

B- R

L- O

W- B

W- R

W- B W- B

W- R

B- R

L- O

W- B

2003 4RUNNER (EWD514U)

117

Multiplex Communication System

Washer

OFF

INT

ON

Rear Wiper and

Washer SW

Washer

C14
Combination SW

B 4(A), B 5(B), B 6(C

WMTR RWON RWINT

2

1B1

B- OLG- BLG- B

3

M

W 2

Wash er M otor

4

IC33IH167IH1

12 10

C10 C9

GR- R

GR- R

2

)

BR- W

BR- W

13

BR- W

C17

R- Y

)
B

(

BG

, J19

)
A

(

J18

Junction Connector

AG

R- Y

7

SIL

D 1
Data Link
Connector 3

)

B

(

, J19

)

A

(

J18

Junction Connector

A14 A23

GR

BE

AA

GRGRGR

IC4D6

(

EA15

2UZ- FE

(

EA13

1GR- FE

4

L

BR- R

A14 I E1 BD19

BR- R

)

)

B 8(A), B 9(B
Back Door ECUBody ECU

A1A56AA4

R

)

L- R

BD175BD1BD16

W- R

B

B- R

BDRSIGBECUMPX2MPX2LOBD2

L

L- O

W- B

W- R

B- R

L- O

W- B

W- B W- B

G 2
Gener ator

118

2003 4RUNNER (EWD514U)

B 8(A), B 9(B
Back Door ECU

)

IC-IC 2IC1IC+BDDNBDUPUPDOWNEHSW-HSW+ GND

V- W

LG- R

1

2

B10

Back Door Opener SW

LG- B

T10
Tailgat e Cont rol SW

GR- R

V- Y

Y- B

R- B

B11
Back Door Power Window Motor

B- O

Y- G

L- W

W- R

326154123

EPLSPLS2SSRBGR

A3B10 B22 B19 B4B5B13 B25 B11 B16 B17 B23

W- B

W- B

119

2003 4RUNNER (EWD514U)

Multiplex Communication System

B6B7B8B15 B14

G- Y

R- G

B 7
Back Door Courtesy SW

Back Door Half Latch SW
Back Door Lock Detection SW
Back Door Lock Motor

LSE

B21

L- B

B- R

BR- W

3

M

B 8(A), B 9(B
Back Door ECU

ACT-ACT+POSFUL LHALF

L- R

21465

SGND P

)

W

G- R

P- B

1

BR- B

Return
Position

Furthest
Position

Stop

2

R23
Rear Wiper Motor

Rear Wiper Position SW

WIP+

Y- G

WIP-

1B2B18 B 12 B 3 B

R- G

453

M

120

2003 4RUNNER (EWD514U)

System Outline

Communication Outline

Communication is made among the body, theft deterrent and back door ECUs.
When the ECU receives a signal from related switches, i.e., the rear wiper SW, the body ECU sends signals to the back door
ECU, and moves rear wiper.
For details, please refer to the new car features and/or the repair manual.

Service Hints

Body ECU

22-Ground : Approx. 12 volts with ignition SW at ACC or ON position

11, 12-G round : A lways ap prox. 12 vol ts

1, 10-Ground : Approx. 12 volts with ignition SW at ON position
4, 16-Ground : Always continuity

B8 (A) Back Door ECU

(A) 4, (A) 5-Ground : Always approx. 12 volts
(A) 6-Ground : Approx. 12 volts with ignition SW at ON position
(A) 3-Ground : Always continuity

T5 Theft Deterrent ECU

2, 3-Ground : Always approx. 12 volts

10-Ground : Approx. 12 volts with ignition SW at ON position
29-Ground : Always continuity

2003 4RUNNER (EWD514U)

121

Multiplex Communication System

: Parts Location

Code See Page Code See Page Code See Page

A39 36 F13 40 J31 A 38

B1 36

B4 A 36

B5 B 36

B6 C 36

B7 40

B8 A 40

B9 B 40

B10 40

B11 40

B12 42

B13 42

C8 A 37

C9 B 37

C10 C 37

C12 37 I17 37 P4 39

C14 37 I20 40 P7 41

D1 37

D2 37

D3 37

D7 40

D8 40

D9 40

D10 40 J4 38 P15 41

D11 40 J5 38 R21 A 41

D12 40 J6 38 R22 B 41

D13 40 J7 38 R23 41

D14 40 J8 A 38 S8 39

D15 40 J9 B 38 S12 39

D16 40 J10 A 38 S15 39

D17 40 J11 B 38

D18 40 J12 A 38

D19 40 J13 B 38 T5 39

D20 40 J14 A 38 T9 39

D21 40 J15 B 38 T10 41

E3

E8 37 J20 A 38

F1

F2

F12 40 J25 38

32 (2UZ-FE) J18 A 38 V6 41

34 (1GR-FE) J19 B 38 V7 41

32 (2UZ-FE) J21 B 38

34 (1GR-FE) J22 A 38

32 (2UZ-FE) J23 B 38

34 (1GR-FE) J24 38

G2

H1

H2

H3

H4

H9

H10

J1

J2 A

J3 B

32 (2UZ-FE) J32 B 38

34 (1GR-FE) J33 38

32 (2UZ-FE) J35 38

34 (1GR-FE) J37 38

32 (2UZ-FE) J38 40

34 (1GR-FE) J40 A 40

32 (2UZ-FE) J41 B 40

34 (1GR-FE) K3 39

32 (2UZ-FE) L2 40

34 (1GR-FE) M3 41

32 (2UZ-FE) M4 41

34 (1GR-FE) M5 41

32 (2UZ-FE)

34 (1GR-FE)

33 (2UZ-FE) P9 41

35 (1GR-FE) P10 41

33 (2UZ-FE) P11 41

35 (1GR-FE) P12 41

33 (2UZ-FE) P13 41

35 (1GR-FE) P14 41

P1

T1

W2

W3

33 (2UZ-FE)

35 (1GR-FE)

33 (2UZ-FE)

35 (1GR-FE)

33 (2UZ-FE)

35 (1GR-FE)

33 (2UZ-FE)

35 (1GR-FE)

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

122

2003 4RUNNER (EWD514U)

:

()

g()

Junction Block and Wire Harness Connector

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

1A 24 Roof Wire and Driver Side J/B (Lower Finish Panel)

1B

1C

1D

1E

1F 24 Floor No.2 Wire and Driver Side J/B (Lower Finish Panel)

1G

1H

1K

3C

3D

3E

3F

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1

IA1

IA2

IC2

IC3

IC4

IE1 50 Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)

IF1 50 Instrument Panel Wire and Relay Wire (Behind the Instrument Panel J/B)

IG1 50 Instrument Panel No.2 Wire and Instrument Panel Wire (Behind the Combination Meter)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

IM1 52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

IN1 52 Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

IO1 52 Instrument Panel Wire and Floor Wire (Right Kick Panel)

IP1

IP2

BA1 54 Rear Door No.2 Wire and Instrument Panel Wire (Left Center Pillar)

BB1 54 Rear Door No.1 Wire and Instrument Panel Wire (Right Center Pillar)

BD1 54 Back Door No.1 Wire and Floor No.2 Wire (Left Rear Side of Roof)

BH1 54 Back Door No.1 Wire and Back Door No.2 Wire (Left Side of Back Door)

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1J

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1L

28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

:

Connector Joining Wire Harness and Wire Harness

44 (2UZ-FE)

46 (1GR-FE)

48 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

II1 50 Instrument Panel Wire and Instrument Panel Wire (Instrument Panel Brace LH)

52 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

2003 4RUNNER (EWD514U)

123

Multiplex Communication System

g

:

Ground Points

Code See Page Ground Points Location

EA

EB

EF

BM 54 Floor Seat Crossmember RH

BO 54 Rear Pillar LH

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

44 (2UZ-FE)

46 (1GR-FE)

44 (2UZ-FE)

46 (1GR-FE)

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

II 48 Instrument Panel Brace RH

IK 48 Right Kick Panel

BL 54 Floor Seat Crossmember LH

:

Splice Points

44 (2UZ-FE) I5 50 Instrument Panel Wire

E1

46 (1GR-FE) B1 54 Front Door RH Wire

44 (2UZ-FE)

E7

46 (1GR-FE)

I3 50

Front Right Fender

Front Left Fender

Rear Side of Left Bank Cylinder Block

Engine Room Main Wire

B3 54 Roof Wire

B6 54 Back Door No.1 Wire

124

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

125

Headlight

From Power Sourc e Syste m (See Page 5 8

1

10A
ECU- B

2

2

7. 5A
ACC

)

W- R

10A
ECU- IG

SIG

10

ACC BECU

22 11

1B4

B 4(A), B 5(B), B 6(C
Body ECU

HRLY HF2

17

1B8

W

)

C20

R- B

R- B

W

IC4A1

* 1 : w/ Daytime Running Light

W

W

R- B

2

2

23

15

2

B

Battery

HEAD
Relay

R- B

126

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

R- B

R- B

R- B

22

1111

10A
HEAD
(

)

LO LH

2222

R- Y

2212

)

1

Low

H 2

Headlight LH

(

W- B

H 4

Headlight RH

10A
HEAD
(

)

LO RH

R- B

)

Low

(

W- B

H 1

Headlight LH

10A
HEAD
(

)

HI LH

2222

R- L

)

1

High

(

R- GR- G

R- W

10A
HEAD
(

HI RH

PKB

B2

LGLG

1J17

1E1

)

1

P 4

Parking Brake SW

2

)

1

High

H 3

Headlight RH

(

R- G R- W

L

A14

GRGRGRGR

)
B

(

BE

, J19

)
A

(

J18

Junction

Connector

AA

IC4D6

(

2UZ- FE

(

1GR- FE

)

)

EA15
EA13

4

L

IC4A4

E 7

E 1

W- B

EA

W- B

(*1)

W- B

EB

W- B

(*1)

IC4A5

R- W

14

Beam

13

IN110

R- G

C 8

Combination Meter

G 2
Generator

R- G

R- G

R- G

W- B(*1

W- B(*1

)

)

2003 4RUNNER (EWD514U)

127

Headlight

C12
Combination SW

OFF

Tail

Head

Light

Contr ol SW

Auto

Low

High

Dimmer SW

Flash

LH

Turn

RH

HEAD HF

C1

R

IH11

R

W- B

IH19

81613

B 4(A), B 5(B), B 6(C
Body ECU

C7

R- WR- W

I 5

)
*1

(

W- B

2

7

13

)
*1

(

R- G

G- B

G- Y

)

GND1 GND2

4

16

1H2

W- B

A

J15

Junction

Connecto r

A

W- B

)
*1

(

W- B

R- G

R- G

R- G

W- B(*1

W- B(*1

J12(A), J13(B
Junction Connector

)

)

* 1 : w/ Daytime Running Light

)

CACA CA

R- G

R- G

)

B

(

BA

, J11

)

A

(

J10

Junction

Connector

BB

BB

R- G

)

G- Y(*1

)

G- B(*1

)

W- B(*1

)

W- B(*1

J 5
Junc tion

A

Connector

A

A

W- B

(*1)

IG

W- B

(*1)

128

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

From Power Sourc e Syste m
(

See Page 58

15A
IG1

1J8

)
*1

(

Y- R

A

A

)
*1

(

Y- R

J 7
Junction
Connect or

D 2

)

15A
TRN- HAZ

Daytime Running

Light Relay

Turn Signal

DRL

A7

1

12

LG- R

DRL

W- B

)
*1

(

EIG

)(
*1

(

2

2

)
*1

(

B- Y

IC4A2

)(
*1

(

B- Y

6

B

Flashe r Rela y

19

)
*1

Y- R

HAZ

8

)

W

*1

(

10

HAZ

TSR TSL TFL TFR

87 4 2

)

*1

(

G- Y

)

*1

(

G- B

)
*1

(

R- B

)
*1

(

R- Y

1J151J14

)

W

*1

(

2

Hazard SW

H11

3

)

*1

(

W- B

3FB

3FB3FB

G- Y(*1

G- B(*1

W- B(*1

W- B(*1

W- B

(*1)

)
B

(

, J21

)
A

(

J20

Junction

Connector

HA

)

)

)

)

)
B

(

BF

)
*1

(

Y- R

DB

, J23

)
A

(

J22

Junction

Connector

EA

)
*1

W- B

IH13IH12

)

*1

(

G- Y

)

*1

(

G- B

IC4A3 IN11

R- B

3

Front Turn Signal

Light LH

F 5

2

W- B

)
*1

(

F 6

)
*1

(

)
*1

(

R- Y

3

Front Turn Signal

Light RH

2

)
*1

(

W- B

J37

)

*1

(

W- B

AA

Junction

Connector

J24

)

*1

(

W- B

Junction

Connector

IIIK

129

2003 4RUNNER (EWD514U)

Headlight

System Outline

(w/ daytime running light)
∗ This system is designed to automatically activate the turn signal lights during the daytime to keep the car highly visible to

other vehicles. This system is controlled by the body ECU.
This system makes use of the turn signal lights as daytime running lights.
For this reason, when the turn signal lights are operated, the daytime running lights function is interrupted momentarily,
which, however, will be brought back into operation as soon as the interposed operation is over.

∗ This system is enabled when the conditions given below are met.

A) Ignition switch ON condition

B) Turn signal light switch OFF condition

C) Hazard light switch OFF condition

D) Light control switch OFF condition

E) Parking brake switch OFF condition (Parking brake out of operating condition)**

**: This system does not become active when the parking brake switch is ON. However, once the OFF signal of the
parking brake switch is input into the body ECU, this system will become active thereafter, regardless of whether the
parking brake switch is ON or OFF.

: Parts Location

Code See Page Code See Page Code See Page

B4 A 36 H1 34 (1GR-FE) J13 B 38

B5 B 36

B6 C 36

C8 37

C12 37

D2 37

F5

F6

G2

H1 32 (2UZ-FE) J12 A 38

32 (2UZ-FE)

34 (1GR-FE) H11 37 J23 B 38

32 (2UZ-FE) J5 38 J24 38

34 (1GR-FE) J7 38 J37 38

32 (2UZ-FE) J10 A 38 P4 39

34 (1GR-FE) J11 B 38

H2

H3

H4

32 (2UZ-FE) J15 38

34 (1GR-FE) J18 A 38

32 (2UZ-FE) J19 B 38

34 (1GR-FE) J20 A 38

32 (2UZ-FE) J21 B 38

34 (1GR-FE) J22 A 38

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1B

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1E

1H

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

EA1

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

IN1 52 Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1J

3F 28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

:

Connector Joining Wire Harness and Wire Harness

44 (2UZ-FE)

46 (1GR-FE)

Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)

130

2003 4RUNNER (EWD514U)

:

g

Ground Points

Code See Page Ground Points Location

EA

EB

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

E1

E7 44 (2UZ-FE)

44 (2UZ-FE)

46 (1GR-FE)

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

II 48 Instrument Panel Brace RH

IK 48 Right Kick Panel

:

Splice Points

44 (2UZ-FE) E7 46 (1GR-FE) Engine Room Main Wire

46 (1GR-FE)

Front Right Fender

Front Left Fender

Engine Room Main Wire

I5 50 Instrument Panel Wire

131

2003 4RUNNER (EWD514U)

Front Fog Light

R- L

)

B 6(C
Body ECU

HRLY HF2

17

1B8

W

W

R

C1

HEAD

C20

W

IC4A1

W

R- B

2

2

23

R

2

1

10A
HEAD
(

)

HI LH

2

2

R- L R- B

C12
Combination SW

OFF

Tail

Head

Light

Control SW

Auto

Low

High

Dimmer SW

Flash

OFF

Fog

Light

SW

ON

G- R

IC32

G- R

11

IH11

RR

17

W- B

161310

G- R

W- B

132

HEAD
Relay

L

15

2

B

Battery

2003 4RUNNER (EWD514U)

R- L

G- R

From Power Source Syste m (See Page 5 8

1

15A
FR F OG

2

2

LG

22

25

)

W- B

FR FOG
Relay

13

22

G

I 3

W- BW- B

G

2

F 1

Front Fog Light LH

1

A

J15

Junction

Connector

A

W- B

G

2

F 2

Front Fog Light RH

1

W- B

A

IG

J 5
Junction
Connector

E 1

W- B

EA

133

2003 4RUNNER (EWD514U)

Front Fog Light

Service Hints

FR FOG Relay

3-5 : Closed with light control SW at HEAD position, dimmer SW at LOW position and fog light SW at ON position

: Parts Location

Code See Page Code See Page Code See Page

B6 C 36 F1 34 (1GR-FE) J5 38

C12 37

F1 32 (2UZ-FE)

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1B 24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IC3

IC4

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

F2

32 (2UZ-FE) J15 38

34 (1GR-FE)

:

Ground Points

Code See Page Ground Points Location

EA

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

:

Splice Points

44 (2UZ-FE)

E1

46 (1GR-FE)

Front Right Fender

Engine Room Main Wire

I3 50 Engine Room Main Wire

134

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

135

Automatic Light Control

HRLY

17

1

50A
J/B

2

2

L- W

1C11B4

51

TAIL
Relay

32

18

TRLY

GND2GND1

16

4

B 5(B), B 6(C
Body ECU

From Power Sourc e Syste m (See Page 5 8

1

10A
ECU- B

2

2

W- R

11 2210

BECU

A

)

C3

G- OG- O

)

7. 5A
ACC

ACC

CLTB CLTE

6C C21 4 C

CLTS

SIG

10A
ECU- IG

DCTY

B23

1B8

WB

R- B

2

2

23

15

2

Battery

HEAD
Relay

21H

W- B

A

C12
Combination SW

OFF

Tail

Head

Light

Control SW

Auto

IH110

)
B

(

BH

, J19

)
A

12

16

W- B

A

J15

Junction

A

W- B

A

Connecto r

J 5
Junction
Connect or

(

J18

Junction

Connector

AF

R- B R- B

1

D12

Door Courtesy S W

Front LH

L- Y

IG13IG12IG11

L- Y

1

CLTB

A39
Automatic Light Control
Sensor

G- W

G- W

34

CLTE

Y

Y

CLTS

136

IG

2003 4RUNNER (EWD514U)

System Outline

The automatic light control system works when the light control SW is turned to AUTO. The automatic light control sensor
detects the brightness around the vehicle. By this function, the system automatically turns the taillight and headlight on if the
brightness is below the regular level and turns the taillight and headlight off when the surroundings become brighter than the
regular level.

Service Hints

C12 Combination SW

12-16 : Closed with the light control SW at AUTO position

Body ECU

22-Ground : Approx. 12 volts with the ignition SW at ACC or ON position
10-Ground : Approx. 12 volts with the ignition SW at ON position
11-G round : Alw ays ap prox. 12 vol ts

4, 16-Ground : Always continuity

D12 Door Courtesy SW Front LH

1-Ground : Continuity with the driver’s door open

: Parts Location

Code See Page Code See Page Code See Page

A39 36 C12 37 J15 38

B5 B 36 D12 40 J18 A 38

B6 C 36 J5 38 J19 B 38

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1B

1C

1H 25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IG1 50 Instrument Panel No.2 Wire and Instrument Panel Wire (Behind the Combination Meter)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

Code See Page Ground Points Location

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

:

Connector Joining Wire Harness and Wire Harness

:

Ground Points

IG 48 Left Kick Panel

2003 4RUNNER (EWD514U)

137

Light Auto Turn Off

From Power Source Syste m (See Page 5 8

1

50A
J/B

2

2

L- W

1C1

51

TAIL
Relay

32

18

TRLY

HRLY

17

4

)

7. 5A
ACC

22

ACC

GND2GND1

16

HEAD

RR

TAIL

C1

C8

GG

B 4(A), B 5(B), B 6(C
Body ECU

A

C3

G- OG- O

)

RRCYRLCYPCTYDCTY

B23 B24 1 1 B B12

1B8

WB

R- B

2

2

23

15

2

Battery

HEAD
Relay

21H

W- B

A

OFF

Tail

Head

Light

Control SW

Auto

C12
Combination SW

P- L

P- L

D14

Door Courtesy S W

D15

Rear LH

Door Courtesy S W

Rear RH

D13

Door Courtesy S W

Front RH

P- B

IE1A11 IO18

P- B

IH11

IH18

14

13

IH110

)
B

(

BH

, J19

)
A

12

16

W- B

A

J15

Junction

A

W- B

A

Connecto r

J 5
Junction
Connect or

(

J18

Junction

Connector

AF

R- B R-B

1111

D12

Door Courtesy S W

Front LH

R- Y

138

IG

2003 4RUNNER (EWD514U)

From Po wer Source Syste m (See Page 58

)

SIG

10A
ECU- IG

B- R

81F

1110

BECU

B4B3

1

10A
ECU- B

2

2

W- R

1B4

PRGRDA

W- R

1F12

B 4(A), B 5(B), B 6(C
Body ECU

)

MPX2

A23

D

D

1

2

RR

IC4C2

R

2

10A
DOME

J 7
Junc tion
Connector

L- R

IE1A12 I E1A13 IE1A15

L- R

RDA PRG +B

E

1

W- B

W- B

G- O

G- O

D 7
Door Control
Receiver

W- B

AAAAAA

BA

W- B

BLBO

R

R

532

10

BD1

)

B

(

, J41

)

A

(

J40

Junc tion

Connector

W- B

A3

GND

BR- R

A14 IE1

BR- R

BD19BD17BD15

R

A1A56A

B 8(A), B 9(B
Back Door ECU

W- R

L- R

)

B- R

B

SIGBECUMPX2

B 7
Back Door Courtesy SW

Back Door Half Latch SW

563

R- G

B6B721B

G- Y

B- R

LSEFULLHALF

2003 4RUNNER (EWD514U)

139

Light Auto Turn Off

System Outline

When all doors are closed after opening some or all of them after the Ignition SW is turned from ON to OFF with the head
and tail lamps ON, these lamps will remain ON for 30 seconds after the doors are closed and then go OUT automatically.
Pressing the lock SW on a wireless controller twice in succession turns OFF the lamps instantly.

Service Hints

C12 Combination SW

14-16 : Closed with the light control SW at TAIL or HEAD position
13-16 : Closed with the light control SW at HEAD position
12-16 : Closed with the light control SW at AUTO position

Body ECU

22-Ground : Approx. 12 volts with the ignition SW at ACC or ON position
10-Ground : Approx. 12 volts with the ignition SW at ON position

11-G round : Alw ays ap prox. 12 vol ts

4, 16-Ground : Always continuity

D12, D13, D14, D15 Door Courtesy SW Front LH, RH, Rear LH, RH

1-Ground : Continuity with the door open

: Parts Location

Code See Page Code See Page Code See Page

B4 A 36 D7 40 J15 38

B5 B 36 D12 40 J18 A 38

B6 C 36 D13 40 J19 B 38

B7 40 D14 40 J40 A 40

B8 A 40 D15 40 J41 B 40

B9 B 40 J5 38

C12 37 J7 38

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1B

1C

1H 25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IE1 50 Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

IO1 52 Instrument Panel Wire and Floor Wire (Right Kick Panel)

BD1 54 Back Door No.1 Wire and Floor No.2 Wire (Left Rear Side of Roof)

Code See Page Ground Points Location

BO 54 Rear Pillar LH

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

1F 24 Floor No.2 Wire and Driver Side J/B (Lower Finish Panel)

:

Connector Joining Wire Harness and Wire Harness

:

Ground Points

IG 48 Left Kick Panel

BL 54 Floor Seat Crossmember LH

140

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

141

Turn Signal and Hazard Warning Light (w/ Daytime Running Light)

From Power Source Syste m (See Page 58

15A
IG1

1J8

A

J 7
Junction
Connect or

A

AH

J20(A), J21(B
Junction
Connect or

BF

Y- R Y- R Y- R

1653

TFL TFR E TSL TSR HAZ

429 7810

R- B

)

D 2
Turn Signal Flasher Relay

R- Y

)

1

15A
TRN- H AZ

2

2

B- Y

IC4A2

B- Y

W- B

G- B

L- B

G- Y

L- Y

TRRTR LBIG

W

L- Y

L- B

1J231J5

L- Y

1F15 1F9

1G31G2

L- Y

L- B

L- B

IC4A16 IN11

R- B

3

2

F 5

Front Turn Signal

Light LH

W- B

IH12IH13

R- Y

3

Turn

2

F 6

Front Turn Signal

Light RH

)

B

(

, J23

)

A

(

J22

Junction

W- B

W- B

Connector

W- B

C12
Combination SW

BD

AE

G- B

13

RH

LH

2

W- B

A

J15

Junction

Connector

AA

W- B

A

AAAW- B

G- Y

W- B

J 5
Junction
Connector

W- B

1J14

L- Y

1J15

W

2

H11

Hazard SW

3

W- B

3FB

B

3F

3FB

W- BW- B

A

J37 J24
Junction
Connect or

O 2

Turn Signal Indicat or

W- B

W- B

A

21

TURN R TUR N L

GND

Light

5

W- B

)
B

(

BC

, J11

)
A

(

J10

Junction

Connector

AA

W- B

Junction
Connecto r

L- B

142

EB EA

IG

2003 4RUNNER (EWD514U)

IK

II

L- Y

L- B

L- B

AD

J39

Junction

Connect or

AD

L- BW- B

2

Turn

R14

Rear Combi nation

Light LH

6

AAAA

)
B

(

, J41

)
A

(

J40

Junction

Connect or

BA

R15

Rear Combi nation

L- Y

D

A

93

LTIN RTIN

T14

Towing Converter

Relay

AA

L- B

L- Y

3

Turn

Light RH

6

W- B

L- Y

W- B

BL

W- B

BO

143

2003 4RUNNER (EWD514U)

Turn Signal and Hazard Warning Light (w/ Daytime Running Light)

Service Hints

D2 Turn Signal Flasher Relay

1-Ground : Approx. 12 volts with the ignition SW at ON position
9-Ground : Always continuity
6-Ground : Always approx. 12 volts

: Parts Location

Code See Page Code See Page Code See Page

C12 37 J10 A 38 J39 40

D2 37 J11 B 38 J40 A 40

F5

F6

H11 37 J23 B 38 T14 41

J5 38 J24 38

J7 38 J37 38

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

32 (2UZ-FE) J15 38 J41 B 40

34 (1GR-FE) J20 A 38 O2 39

32 (2UZ-FE) J21 B 38 R14 41

34 (1GR-FE) J22 A 38 R15 41

:

Relay Blocks

:

Junction Block and Wire Harness Connector

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

1F 24 Floor No.2 Wire and Driver Side J/B (Lower Finish Panel)

1G

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

IN1 52 Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

Code See Page Ground Points Location

EA

EB

BO 54 Rear Pillar LH

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1J

3F 28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

:

Connector Joining Wire Harness and Wire Harness

:

Ground Points

44 (2UZ-FE)

46 (1GR-FE)

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

II 48 Instrument Panel Brace RH

IK 48 Right Kick Panel

BL 54 Floor Seat Crossmember LH

Front Right Fender

Front Left Fender

144

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

145

Turn Signal and Hazard Warning Light (w/o Daytime Running Light)

From Power Source Syste m (See Page 5 8

15A
IG1

1J8

A

J 7

Junction

Connector

A

Y- R Y- R

)

B

(

AH

, J21

)

A

(

J20

Junction

Connector

BF

Y- R

Y- R

1

IG

)

1

15A
TRN- H AZ

2

2

B- Y

IC4A2

B- Y

IF16IF11

B- Y

423

L- Y

L- B

LLLR+B

IF110

W

8

EHW

L- Y

L- B

I 4

I 4

L- Y

IF13IF15

W

L- Y

L- B

L- B

1J231J5

L- Y

1F15 1F9

L- Y

L- B

L- Y

L- B

L- B

GND EL ER

T 9

Turn Signal

Flasher Relay

756

W- B

W- B

Turn

C12
Combination SW

)
B

(

BD

, J23

)
A

(

J22

Junction

Connector

AE

G- B

IF17IF18IF19

G- B

IH12IH13

G- B

13

RH

LH

J15

G- Y

G- Y

G- Y

W- B

A

Junction

Connector

AA

W- B

W- B

1G31G2

1J14

1J15

W

2

H11

Hazard SW

3

W- B

3FB

3FB

W- BW- B

O 2

Turn Signal Indicat or

Light

B

3F

W- B

L- Y

21

TURN R TUR N L

GND

52

W- B

)
B

(

BC

, J11

)
A

(

J10

Junction

Connector

AA

W- B

L- B

146

A

AAA

IG

J 5
Junction
Connect or

W- B

A

J37 J24
Junction
Connecto r

IK

W- B

A

W- B

II

Junction
Connect or

2003 4RUNNER (EWD514U)

L- Y

L- B

L- Y

L- B

IF14IF12

L- B

AD

J39

Junction

Connect or

AD

L- BW- B

2

Turn

R14

Rear Combi nation

Light LH

6

R15

Rear Combi nation

L- Y

D

A

L- Y

3

Turn

Light RH

6

L- B

93

LTIN RTIN

T14

Towing Converter

Relay

L- Y

R- B

IC4A16 IN11

R- B

1

2

F 5

Front Turn Signal

Light LH

R- Y

R- Y

1

2

F 6

Front Turn Signal

Light RH

AAAA

)
B

(

, J41

)
A

(

J40

Junction

Connect or

BA

W- B

BL

W- B

AA

W- B

BO

W- B

W- B

EB EA

W- B

147

2003 4RUNNER (EWD514U)

Turn Signal and Hazard Warning Light (w/o Daytime Running Light)

Service Hints

T9 Turn Signal Flasher Relay

1-Ground : Approx. 12 volts with the ignition SW at ON position
7-Ground : Always continuity
4-Ground : Always approx. 12 volts

: Parts Location

Code See Page Code See Page Code See Page

C12 37 J11 B 38 J40 A 40

F5

F6

H11 37 J23 B 38 T9 39

J5 38 J24 38 T14 41

J7 38 J37 38

J10 A 38 J39 40

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

32 (2UZ-FE) J15 38 J41 B 40

34 (1GR-FE) J20 A 38 O2 39

32 (2UZ-FE) J21 B 38 R14 41

34 (1GR-FE) J22 A 38 R15 41

:

Relay Blocks

:

Junction Block and Wire Harness Connector

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

1F 24 Floor No.2 Wire and Driver Side J/B (Lower Finish Panel)

1G

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IC4 48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

IF1 50 Instrument Panel Wire and Relay Wire (Behind the Instrument Panel J/B)

IH1 50 Instrument Panel Wire and Instrument Panel Wire (Behind the Combination Meter)

IN1 52 Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

Code See Page Ground Points Location

EA

EB

BO 54 Rear Pillar LH

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1J

3F 28 Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)

:

Connector Joining Wire Harness and Wire Harness

:

Ground Points

44 (2UZ-FE)

46 (1GR-FE)

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

II 48 Instrument Panel Brace RH

IK 48 Right Kick Panel

BL 54 Floor Seat Crossmember LH

Front Right Fender

Front Left Fender

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

I4 50 Relay Wire

148

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

149

Interior Light

From Power Source System (See Page 58

7. 5A
ACC

ACC

22

)

GND2

B 4(A), B 5(B), B 6(C
Body ECU

W

ILE

13

81A

W

B 3

W

1A12 1A18

W- BR

E

W

GND1

4

71A21H

W- B

B 3

W

WW

)

)(
*1

(

W

(*1)

221

3162

ON

OFF

DOOR

I20

Interior Light

1

W

L 2

Luggage Compartment

32

OFF

ON

Light

1

W

B 3

W

B

P 7

DOOR

Personal Light

1A91E61J22

V 6

Vanity Light LH

)

W

*1

19 1A1A4

V 7

Vanity Light RH

115

W

(*1)

R

150

A

J 5
Junction
Connector

IG

R- W

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

* 1 : w/ Vanity Light
* 2 : Limited

PCYL

25 A B22 B6A26 B21

1K9

R- GRR

6

2

I17

Ignition Key

Cylinde r Light

J35

BC

)
B

(

, J13

)
A

(

J12

Junc tion

Connector

AB

AB

Junction Connector

HHHH

Y

Y

1

2

D 9

Door Courtesy Light

Front RH

R

IP21BB19IA113 BA19

RCYL

L- R

L- R

1

2

D11

Door Courtesy Light

Rear RH

R

LP

)

*2

(

W- RW- R

J20(A), J21(B
Junction
Connector

BC

ACAC

)

*2

(

IO110 IE1D4IP19BB18IA198BA1

)

*2

(

W- R

1

2

F13

Foot Light RH

)

R

*2

(

IO19IE1D3

)

W- G

)(
*2

(

W- R

)
*2

W- R

1

2

F12

Foot Light LH

R

Y- G

1

2

D 8

Door Courtesy Light

Front LH

)(

R

*2

(

LCYLDCYL

P- GP- G

1

2

D10

Door Courtesy Light

Rear LH

R

R

E EE

R

R- W R- W

E

R

R

)

R(*2

J 6
Junction Connector

)

*2

(

R

)

R

R

*2

R

E

2003 4RUNNER (EWD514U)

151

Interior Light

B4B3

DD D

L- R

IE1A12 IE1A13 IE1A15

L- R

RDA PRG +B

E

1

W- BW- B

G- O

G- O

D 7
Door Control
Receiver

532

B 4(A), B 5(B), B 6(C
Body ECU

R

R

)

J 7
Junction Connector

R

From Power Sourc e Syste m
(

See Page 58

A3

)

1

10A
DOME

2

2

R

22

52

RR

IC31IC4C2

RR

R

B23 B24

BH

AF

R- B R- B

11

PCTYDCTYLMRYPRGRDA

R- Y

)
B

(

, J19

)
A

(

J18

Junction

Connector

D12

Door Courtesy S W

D13

Front LH

Door Courtesy S W

Front RH

R- W

AAAAAA

)
B

(

, J41

)
A

(

J40

Junction

BA

W- B

Connector

W- B

31

22

R- W

DOME
Relay

R

R

W- B

152

W- B

W- B

BLBO

2003 4RUNNER (EWD514U)

B 4(A), B 5(B), B 6(C
Body ECU

)

11 B B12 C12 C11

P- BP- B

IE1A11 IO18

11

D14

Door Courtesy S W

Rear LH

From Power Sourc e Syste m
(

See Page 58

P- L

7. 5A
GAUGE

P- L

D15

Door Courtesy S W

Rear RH

)

V- Y

1G4

R- L

Door

C15 C16 C13

R- L

DCY2DRLPRRCYRLCY

W- L

C8A17

RR

BRBRBR

IM17

SIG

10

From Power Source Syste m
(

See Page 58

)
C

(

, C10

)
A

(

C 8

Combinatio n Meter

)

10A
ECU- IG

1F8

B- R

)

B

BF

(

, J 9

)

A

(

J 8

Junction

Connector

AH

R

W- B W- B

B- R

EF

2003 4RUNNER (EWD514U)

153

Interior Light

B 4(A), B 5(B), B 6(C
Body ECU

From Power Sourc e Syste m
(

See Page 58

)

1

10A
ECU- B

2

2

)

BECU

11

1B4

W- R

12 1F

W- R

A23

BR- R

A14 I E1 BD19

BR- R

B 8(A), B 9(B
Back Door ECU

A1A56AA3

R

)

L- R

BD175BD1

W- R

B

B- R

GNDSIGBECUMPX2MPX2

W- BW- B

BD110

G- Y

B 7
Back Door Courtesy SW

LSEFU LL

B7B21

B- R

36

154

B- R

W- B

2003 4RUNNER (EWD514U)

System Outline

The interior light is controlled by the body ECU. This system has following features.

1. Normal Operation

∗ When one of the doors opened, the interior light, luggage compartment light and open door warning light is turned on.

When the all doors are closed, the interior light, luggage compartment light and open door warning light is turned off.

2. Illuminated Entry System

∗ When a door is unlocked through a key operation or transmitter operation, or if a door is opened or closed, the illuminated

entry system turns ON the interior light and the ignition key illumination.

∗ If the ignition switch is turned to the ACC or ON position or if all doors are locked during the 15 seconds in which these

lights are ON, they will immediately turn OFF.

: Parts Location

Code See Page Code See Page Code See Page

B4 A 36 D12 40 J12 A 38

B5 B 36 D13 40 J13 B 38

B6 C 36 D14 40 J18 A 38

B7 40 D15 40 J19 B 38

B8 A 40 F12 40 J20 A 38

B9 B 40 F13 40 J21 B 38

C8 A 37 I17 37 J35 38

C10 C 37 I20 40 J40 A 40

D7 40 J5 38 J41 B 40

D8 40 J6 38 L2 40

D9 40 J7 38 P7 41

D10 40 J8 A 38 V6 41

D11 40 J9 B 38 V7 41

:

Relay Blocks

Code See Page Relay Blocks (Relay Block Location)

2 22 Engine Room R/B (Engine Compartment Left)

:

Junction Block and Wire Harness Connector

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

1A 24 Roof Wire and Driver Side J/B (Lower Finish Panel)

1B

1E

1F 24 Floor No.2 Wire and Driver Side J/B (Lower Finish Panel)

1G

1H

1K

24 Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)

25 Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)

1J

2003 4RUNNER (EWD514U)

155

Interior Light

:

Connector Joining Wire Harness and Wire Harness

Code See Page Joining Wire Harness and Wire Harness (Connector Location)

IA1 48 Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)

IC3

IC4

IE1 50 Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)

IM1 52 Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

IO1 52 Instrument Panel Wire and Floor Wire (Right Kick Panel)

IP1

IP2

BA1 54 Rear Door No.2 Wire and Instrument Panel Wire (Left Center Pillar)

BB1 54 Rear Door No.1 Wire and Instrument Panel Wire (Right Center Pillar)

BD1 54 Back Door No.1 Wire and Floor No.2 Wire (Left Rear Side of Roof)

Code See Page Ground Points Location

EF

BO 54 Rear Pillar LH

48 Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

52 Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)

:

Ground Points

44 (2UZ-FE)

46 (1GR-FE)

IG 48 Left Kick Panel

BL 54 Floor Seat Crossmember LH

Rear Side of Left Bank Cylinder Block

:

Splice Points

Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points

B3 54 Roof Wire

156

2003 4RUNNER (EWD514U)

Memo

2003 4RUNNER (EWD514U)

157