1 IS 300 ELECTRICAL WIRING DIAGRAM - 2JZGARAGE · PDF file1 is 300 electrical wiring diagram 1 p 1 1 1 1 2 1d 1 1o 2 acc ig1 ig2 st2 ... 51 32 mpx2 20 ia3 1 2 i 2 ignition ... m overall

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

1 IS 300 ELECTRICAL WIRING DIAGRAM

1

P

1111

1D2

1O1

2

ACC

IG1

IG2

ST2

AM1 4

6

8

7 AM2

8 EA1

IH Cowl sidepanel RH

1

1 1

1D4

7. 5ASTARTER

8 1K

EA12

6 EA1

1B

1 A

3 EA1

1K5

1D5

1 A

B1

B

2B

3B

L

IG

S

9 EA11D1

F

10AGAUGE

9 1K

BD

A

15 D

20 B

See Multiplex

Com

munication

System<

10–3>

P ower S ource Starting and Ignition Charging

1 2 1 2

2

9

2 1 2 1

1

6

W–L

B–L

W W–R

B–L

B

B–Y

G 2

B(A/T )

A

B–Y

GENERATOR

W–B

, W–B

G 1

B–W

B

B–W B–WB–R

WW–L

B–L

W–R

B–R R–L

R–L

R–L

L–R

W–L

L–R

B–L

B(A/T)

B–W

B–R

L–R

B–L

W–L

7. 5A ALT–S

120A ALT

20A AM

2

40A M

AIN

40A AM1

STAR

TERR

ELAY

I12IGNITION SW

S 1 S 2,

STARTER

A B

ENG

INE C

ON

TRO

L MO

DU

LE

DB

E 4

E 6,

B–W

BATTERY

N

, J 2

J 1A

B

JUN

CTIO

N C

ON

NE

CTO

R

RL

5 1

3 2MPX2

20 IA3

1

2

I 2IGN

ITION

CO

IL NO

. 1

I 3IGN

ITION

CO

IL NO

. 2

2

1 1

2

I 4IGN

ITION

CO

IL NO

. 3

1 N 1

NO

ISE FILTE

R(Ignition )

EA Front side of theintake manifold

To Engine Control Module<2–11><2–12>

3 7 6 5 4

1 2 10 9

B–R G B

B–W

B–W

B–W

B–W

B–W

BR

GR

–B

B–R

B–Y

B–L

B–W B–W B–W B–W

I 1IGNITER

P 1PAR

K/N

EUTR

ALPO

SITION

SWGND IN1 IN2 IN3 IGF

C2 C3 C1 +B

To EngineC

ontrolM

odule<2–12>

B (M/T )

B(A/T )

(A/T )(A/T )

B (M/T )

(A/T )

2

1

15 IG1

To Multi–Display<25–2>

B(M

/T )(M

/T )B

–W

B(M/T)

B(M

/T )B–W(M

/T )

C14

CLU

TCH

START S

W

J19JU

NC

TION

CO

NN

EC

TORJ19JU

NC

TION

CO

NN

EC

TOR

C

C

C

C

C

C

2002 LEXUS IS 300 (EWD451U)

M OVERALL ELECTRICAL WIRING DIAGRAM

12

34

51H

34

21

( Con

t. n

ext

page

)2

IS 3

00

25A

EFI

15A

ETC

S12

0AAL

T20

AAM

2

1

11

11

1

4

21D

62E

11O

12C

40A AM1

W–L

B

F15

FUEL

PU

MP

7. 5A OBD

7. 5

AIG

N

2A4

2H13

5 3

1 221

35

2

ACC

IG1

IG2

ST2

AM

14 6

7A

M2

1I

Cow

l sid

epa

nel R

HIH

51D

1

EFI

RE

LAY

12

2

21G

11

V

22

11D

21E

10A

GAU

GE

54 M BLLe

ft qu

arte

r pan

el L

H

12E 2B

5

Cow

l sid

epa

nel R

HIH

8

11

21

2

2A

A

1614

9

1

22

12

413

7

L–W

B–O B–Y

B–O

B–W

W–RW

B–RL–R

L–R

B–L

I12

IGN

ITIO

N S

W

BAT

TER

Y

B–Y

W

L–W

W

W–R

BAT

B–R

TS

B–R

TAC

W–B

SIL

B–O

B–Y

TC

B–Y

CG

B–O

R–L R–L

Po

we

r S

ou

rce

W–B

R–W

W

G–Y

L–R W–B

W–B

W R–L

G–Y

R–W B–

R

V

B–R

J15

JUN

CTI

ON

CO

NN

ECTO

R

En

gin

e C

on

tro

l a

nd

En

gin

e I

mm

ob

ilis

er

Sy

ste

m

A B C GF I K L M N O PB–

R

4 1K

2B4

2I7

2I2

B–R

2B11

B–R

B–R

CIRCUITOPENINGRELAY

B–R

20IA

3

C 9MALFUNCTIONINDICATOR LAMP[COMB. METER]

21

F12FUEL PUMP RESISTOR

FUEL PMPRELAY

13

33

24

33

B–O

G–R

H

G–W

G–W

G–W

G–R

L–R

G–R

L–R

W–B

19IA

3

1EA

1

EBC

ente

r sid

e of

the

inta

ke m

anifo

ld

BRBR

BR

5SG

D 5

DAT

A L

INK

CO

NN

EC

TOR

3

15WFS

E LG

LGJ

EA14

B–R

QB–

R

B–W

17 7

G–W

EA34

From CenterAirbagSensor Assembly<18–3>

From Skid ControlECU<16–9><17–6>

B–Y

6 A/B

B

B

To CombinationMeter<22–2>

8 2G

B–R

B–R

2M8

2E5

B

DB–

R

B–R

B–R

E

2002 LEX

US

IS 300 (E

WD

451U)

M

7 865

2 IS 300 (Cont’ d) (Cont. next page)

17 A 4 A 13 A 7 A 21 C 11 E 15 E 17 C 14 E 16 C 13 E

1

2

2

1

1

2

1

2

1

2

1

2

1

2

2 B 14 A26 A

2 IA1

1 2A

2E4

6 2D 1 2J

6 A

EA17

5 A

AD

F B F B12 IA1

8 IG1 10 IG1 7 IG1

21 IH1 9 IH1 10 IH1

17 B 8 B 28 C 30 C 28 D 9 D

10 E 9 E 3 E 2 E 1 E 6 E 5 E

3 1 3 1 3 1

G

3 4 2 1

4 2 2 4 2 4

F

E

D

C

O

N

M

Engine Control and Engine Immobiliser System

L

K

I

F

G

L–W

B–O

B–Y

B–O

B–W

W

R–L

G–Y

R–W

B–R

B–R

W–R

W

W

R–L

G–Y

B–R

WW

R–W

B

W LG

P

B–O

B–Y

B–O

L–W

Y–G

W–G

R L V

R–W

L–R

B–R

B–R

B–R

B–R

B–R

B–R

B–R

R–W Y W R (*1 )

Y–B

(*1 )(*1 )

(*1 )

(*1 )BR W R

–WR

–W

B–R

BR

B–R

BR

W

R–L

+B

BR–Y

BR

B–R

B–R B–R B–R B–R

BR–Y

BR

(*1)

B–R

(*1)

R–W

BR

B–R

* 1 : Shielded

JUN

CTIO

N C

ON

NE

CTO

R

BA

J 1J 2

,

From Skid C

ontrol ECU

<16–9>

<17–6>

From C

enter AirbagSensor Assem

bly<18–3>

V 2

VSV (A

CIS )

V 4

VSV (E

VAP)

I 5INJEC

TOR

NO

. 1

I 6INJEC

TOR

NO

. 2

I 7INJEC

TOR

NO

. 3

I 8INJEC

TOR

NO

. 4

I 9INJEC

TOR

NO

. 5

T 2THROTTLE CONTROL MOTOR C

2C

AMS

HAFT TIM

ING

OIL C

ON

TRO

L VALV

E

SIL W FC +B +B2

HT

OX2B

OX

HT2B

HT

OX2A

OX

HT2A

HT

OX1A

OX

HT1A

IGSW BATT MREL +BM ACIS PRG #10 #20 #30 #40 #50 CL+ CL– M+ M– GE01 OCV+ OCV–

B–R

E1

15 C

1

2

B–W

+B

B–R

I10IN

JECTO

R N

O. 6

#60

B–R

E1+BE1

C

B

A

11 2G

PB–R

W

From Body ECU<10–9>

B–R

30 A

L–B

IMLD

HG–R

15 A

G–R

FPR

E 3 E 4, ENGINE CONTROL MODULEA B E 5, C E 7, E

To Security Indicator Light

[Com

b. Meter]<

11–3>

22 B

9 IA3

LGLG

WFSE

JLG

QB–R

17 BC2

2

1

1 IC1

10 B

TBP

PP

B–RB–R

B–R

V 8

VSV (P

ressureS

witching V

alve )

A

D

H17

HEATE

D O

XYGEN

SEN

SOR

(Bank 2 Sensor 2 )

H11

HEATE

D O

XYGEN

SEN

SOR

(Bank 2 Sensor 1 )

H 9

HEATE

D O

XYGEN

SEN

SOR

(Bank 1 Sensor 1 )

IH120B BR–Y

B(*1)

28 B 7 B

3 1

2 4

B–R

BR

H10

HEATE

D O

XYGEN

SEN

SOR

(Bank 1 Sensor 2 )

HT

OX1B

OX

HT1B

E1+B

5 EA2 9 EA2

W G–B

W G–B

(*1 )

EA Front side ofthe intakemanifold

BR

BR

B–RB–RB–R

B–R

BR

R–W

IH42

B–RA

B–R

B–R

B–R

B–R

B–R

B–R

E 6, D

DB–R

16 B

B

TACH

B

BB

(A/T )

BR–Y(M/T)

(A/T)

R–Y

22 C

1

2

Y–RB–R

V 3

VSV

(Canister C

losed Valve )

CCV

B–R

B–R

1

2

J16JU

NC

TION

CO

NN

ECTO

R

A

J 7JU

NC

TION

CO

NN

ECTO

RD

AD

(S/D)(W/G)

(W/G)(S/D)

J 3JU

NC

TION

CO

NN

EC

TOR

B

EB



1112

109

2 IS

300

(C

ont’

d)

24C

34B

23C

25E

24E

33B

32B

7C

18B

29B

19B

30B

9B

21B

20B

1J1

32E

102B

1H4

2H9

2B9

7IA

119

IA1

18IA

1

23B

24B

31A

1D

2D

31E

E32

29E

7D

14D

A2

7E

2C

1C

4E

13C

27E

26E

EC

Left

fend

er a

pron

10EA

1

1

EA

From Igniter<1–3>

From Skid ControlECU<16–8><17–5>

To Skid ControlECU<16–8><17–5>

See MultiplexCommunicationSystem<10–3>

1

14

3

43

2

A A A A

11

1

2

23

12

34

21

51

2

A A A A A

MPX

2M

PX1

NE

OEN

G–

ENG

+TR

C–

D

TRC

+IG

FIG

T3

E

IGT2

IGT

VPA2

VPA

VTA

2VT

A

F

PSP

THW

G

E2

E03

E02

E01

MO

PS

EC

MO

LE1

G2

NE–

NE

KNK

2KN

K1

CO

DE

RXC

KTX

CT

* 1

: Shi

elde

d

E10ENGINE OILLEVEL SENSOR

E11ENGINE OIL PRESSURE SW

K 3KNOCK SENSOR 2

K 2KNOCK SENSOR 1

E 8ENGINE COOLANTTEMP. SENSOR

T 9

TRAN

SPO

ND

ER

KEY

AM

PLIF

IER

BR

W–B

W–B

W–B W–B

BR

W–B

W–B

GR

W–B

W–R

BR

L

G

LL

B–W

W

B

B–R

W–B

G–B

V

P–B

R–W R–W

R–W

CO

DE

RXC

K

G

P

L–B

W–G

R–Y

B–L

B–Y

B–R

GR–B

L–W

P–L

L–Y

( *1)

R–W BR B–R

En

gin

e C

on

tro

l a

nd

En

gin

e I

mm

ob

ilis

er

Sy

ste

m

L–Y

BRB

RBR

BR

BR( *1)

( *1)

( *1)

( *1)

BR

( *1)

( *1)

( *1)

( *1)

BR

BR

BR

BR

R

G–Y

W–R

L–Y

L–Y

V

VCV

TA1

VTA

2VC

VPA1

VPA2

GN

D

E2

+B

E2

TXC

T

ANT2

R–W

From

Cen

ter

Airb

ag S

enso

rA

ssem

bly

<18

–3>

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ANSP

ON

DE

RK

EY C

OIL

EA

Fron

t sid

e of

the

inta

ke m

anifo

ld

A

BR

OIL TEMP.

OIL LEVEL

E 3

ENG

INE

CO

NTR

OL

MO

DU

LEA

E 4

, B

E 6

, D

A

J 4

JUN

CTI

ON

CO

NN

ECTO

R

11ATo Unlock Warning

SW<10–16> KSWB–Y

C 3CRANKSHAFTPOSITION SENSOR

C 1CAMSHAFTPOSITION SENSOR

12

21

W–B

( *1)

C

FromMulti–Display<25–3>

Fron

t sid

e of

the

inta

ke m

anifo

ldEB

Cen

ter s

ide

of th

ein

take

man

ifold

( *1)

( *1)

B

8EFrom FAN NO. 1, NO. 2

Relay and Diode(A/C)<23–4>L–B

FAN

2IA

3B–Y

1A

EO

M W–BW–B

3C

ME0

1 BRBR

E 7

, E

IDC

owl s

ide

pane

l LH

A

ECLe

ftfe

nder

apro

n

J 5JUNCTIONCONNECTOR

R–W

W–B

1G5

1A2

W–B

P 2POWER STEERING OILPRESSURE SENSOR

IC13

T 3THROTTLE POSITION SENSOR

A 9ACCEL POSITION SENSOR

25B

32 PT

NKL–W

L–Y

V 7VAPOR PRESSURE SENSOR

1

BR

4IC

15

IC1

EA2

3

BR

–Y

L–Y

L–W

4BSTP

12ASTA

16A

ACM

G

From Stop LightSW<6–4><26–4>

From Park/NeutralPosition SW(A/T)or Clutch Start SW(M/T)<1–2>

From A/C COMP Relay<24–2>

26C

EVG

27C VG

G–B

32C TH

AL–B

BR

B–R

A

15

43

2

G–W

B

L–W

GN

D

VOU

TV

CVC

CPT

NK

E2

E 65

, C

AA

CB

AA

EA3

10

M 1MASS AIR FLOW METER

JUNCTION CONNECTOR

BAJ 1 J 2,

3EA

3

6EA

32

EA3 P–L

L–W

35B

L–Y

VC

L–Y

L–Y

L–W

BR

BR

BR

3BTC

P–B

V

G–B

17IA

1

11B

W–L W–L(M/T) (M/T)

ToCombinationMeter<22–2>S

PD

DD

20A

F/PS

From CenterAirbag SensorAssembly<18–2>

D

L


BR

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

3 IS 300

1

20A ECU

–B1

120A ALT

40A AM1

11

1D2

1

2

3

4

1

7. 5A DR

L NO

. 1

1

15A H–LP R

LWR

15A H

–LP L LWR

2

ACC

IG1AM1 4

1

1 1 1

ECLeft fender apron

1 1O

2F11A4

1D1 2M6

2M3

2F3

2

22

5

2M4

* 1 : Front Fog Light SW

1G5

1A1

IDCowl sidepanel LH

ECLeftfenderapron

P ower Source Headlight

2

1 2

1 1 1 11

9 71

7

1

2 1

2 2 2 22

8

11

AA W–B

WW

R–L

R

B–L

R–Y R

W–B

R–W

L–Y

R–L

W–R

B–R

R–L

C 9

HIG

H BE

AM IN

DIC

ATO

RLIG

HT[C

OM

B. METER

]

4

40A M

AIN

10A H

–LP L UP

R

10A H–LP

R U

PR

7. 5A ECU

–B2

10A ECU

–IG

HE

AD LP R

ELAY

BATTERY

I12IGNITION SW

D 6DAYTIME RUNNINGLIGHT RELAY(Main)

C11COMBINATION SW

HI

DRL +BIG

OFF

TAIL

HEAD

LOW

HIGH

FLASH

ON

From FR FOGRelay<7–3>

Y


CHG–

From C

ombination

Meter<

22–5>

L–R

5

LIGH

TC

ON

TRO

LS

W

L–W

DIM

MER

SW

2

1

*1OFF

BFG LFG HL HF HU H T EL

30A D

RL N

O. 2

1

2

1

1

2

3

4

3 3

3 3

B


1

2

H 7

HE

ADLIG

HT LH

(High )

1

2

H 8

HE

ADLIG

HT R

H(H

igh )

1710

W–R

Y–R

PKB

To Parking Brake

SW

<22–4>

4

16

W–B

6

E

1

D 4DAYTIME RUNNINGLIGHT RESISTOR

R–L

L–Y

R–B

R

L–R

R–L

8

R–L

2F9

L–Y 1 32

R–L

R–L

2

H

R–L R–L

R–W

From Headlight BeamLevel Control ECU<8–2>

From Headlight CleanerSW<7–2>

A

A

J 6JU

NC

TION

CO

NN

EC

TOR

B–R

2F7

2B5

A

A

BR

BRW

–B

W–B

B

DIM

MER

RELA

Y

13

See Automatic LightControl System<11–2>

1

2 2

1

1 B 3 B 2 A

2 B 4 B 1 A 5 A

3A

2M1 2I3

J 7JU

NC

TION

CO

NN

ECTO

R

H 6

HEA

DLIG

HT C

ON

TRO

L ECU

RH

H 5

HEAD

LIGH

T CO

NTR

OL E

CU

LH

D 2

A

DAYTIM

E RU

NN

ING

LIGH

T RELAY N

O. 3

D 3

B

DAYTIM

E RU

NN

ING

LIGH

T RELAY N

O. 4

3

IND

R–B

R–B

R

R–W

R–W

R–B

R–L

R–Y

R

R–W

W–B

W–B

W–B

W–B

W–B

R–L

R–W

R–L

R–W

W–BW–B W–B

2

RR

R–L

R–L

To HeadlightCleanerControl Relay<7–2>

1G

D 8DIODE(Headlight Cleaner)

R–L1F

1FL–Y

4

13

2F2

1 2

D21DIODE(Fog Light)

R–L R–Y

R–Y

R–Y

To Rear

Fog LightS

W<

7–4>

To TheftD

eterrentE

CU

<11–4>



12

34

81H

Cow

l sid

epa

nel R

HIH

34

21

4 IS

300

1

B

15A

TUR

N–H

AZ12

0AA

LT

1

IG

1

LR

1D2

40A

AM

1

1O1

10A

GA

UG

E

E

2

ACC

IG1

AM1

4

1D1

1K1

1A10

1L3

1A7

1A8

23

1

1K7

2A2

1E6

1I8

1E4

1I10

1K2

12

12

1823

56

12

12

56

EC

Left

fend

erap

ron

BL

Left

quar

ter

pane

l LH

Po

we

r S

ou

rce

Tu

rn S

ign

al

an

d H

az

ard

Wa

rnin

g L

igh

t

L–R

W

W

W

B–L

W

W

G–W

G–W

P–G

G–Y

W–B

G–B

G–Y

W–B

W–B

W–B

W–B

G–B

G–Y

G–Y

G–B

G–B W–B

W–B

BATT

ER

Y

I12

IGN

ITIO

N S

W

C 9

TUR

N S

IGN

AL

IND

ICAT

OR

LIG

HT

[CO

MB

. M

ETE

R]

R 7REAR TURN SIGNAL LIGHT RH[REAR COMB. LIGHT RH]

R 5REAR TURN SIGNAL LIGHT LH[REAR COMB. LIGHT LH]

F 7FRONT SIDE TURNSIGNAL LIGHT LH

F 8FRONT SIDE TURNSIGNAL LIGHT RH

FLSH

REL

AY

A

12

1

2

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56

A

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7

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AZ

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TLTR

TB

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owl s

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F 9FRONT TURNSIGNAL LIGHT LH

W–B

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5JU

NC

TIO

NC

ON

NEC

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EC

Left

fend

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AJ

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AL

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OM

B. S

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1

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owl s

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l RH

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AA

BR

BR

J 7

JUN

CTI

ON

CO

NN

EC

TOR

W–B

W–B W–B

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

5 IS 300

1

2

120AALT

1

1O1

1

2

3

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1E5 1F5

6

3

2

3

6

1

4

1

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1

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Power Source Illumination

1

A A A A A A A A

A A A A A A A

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W–G

W–G

W–G

W–G

W–G

W–G

W–G

W–G

BRBR

W–B

W–G

T 8A/T SH

IFT POS

ITION

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river’s S

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ystem<

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(A/T)

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PLAY

A

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G

13

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W AN

D SN

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SW

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(A/T )

(A/T )(A

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(A/T )



12

34

34

21

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300

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REL

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11

21

53

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1H13

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nel R

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1K3

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To Engine ControlModule<2–12>

To Shift LockControl ECU<21–4>

1I12

1F3

AF

G–W

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12

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6

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54

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nel L

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2

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AA

1

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W–B

W–B W–B

W–B

G

G–W

G–B

G–W

G–Y

G–Y

G

G–W

G–Y

W–B

W–B

W–B

R–B

R–B

R–BR–BR–L

R–L

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L 3

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F 4FRONT PARKING LIGHT RH

F 3FRONT PARKING LIGHT LH

L 1LICENSE PLATELIGHT LH

L 2LICENSE PLATELIGHT RH

N 3NOISE FILTER(Stop Light)

H19HIGH MOUNTEDSTOP LIGHT

R 5BACK–UP LIGHT LH[REAR COMB. LIGHT LH]

R 7BACK–UP LIGHT RH[REAR COMB. LIGHT RH]

Po

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J 1

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J 1

J 2

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2B6

2 1

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BB

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AB

A

A

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B B B

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J14

JUN

CTI

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CO

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G G

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AP 1

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R–B

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J15

JUN

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( *1)

(*1)

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ulb

Type


R 7

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R C

OM

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ATIO

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GH

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H

R 8

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R 6

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ATIO

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Left

quar

ter

pane

l LH

J15

JUN

CTI

ON

CO

NN

ECTO

R

R 5

REA

RC

OM

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ATIO

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2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 4

Left fenderapron

EC

3 421

7 IS 300

4

3

2

1

1

HE

AD LP

RE

LAY

1

1 1

1

1

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1

22

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1

5

3

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B–L

FR FOGRELAY

F 2FR

ON

T FOG

LIGH

T RH

F 1FR

ON

T FOG

LIGH

T LH

2A9

1

2

1

2

IH

Power Source

R–Y

W

R–Y

R–Y

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15AH

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R

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bination SW<

3–4>L–W

1

2

1

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2B5

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R

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ystem<

3–1>

1

2

1

1

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2

1

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4

1

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1 2 4

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AA

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1

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1

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D

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5–1>

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3–4>R

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(S/D

)

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/G)

JUN

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NC

ON

NE

CTO

R

R 6

RE

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[RE

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OM

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T LH]

R 8

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LIGH

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OM

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H]

J15JU

NC

TION

CO

NN

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R

J 5JU

NC

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CO

NN

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R

A

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(S/D)

(S/D)

(S/D)

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)

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12

34

8 IS

300

40A

AM

1

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1D2

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ON

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114

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41

63

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4(S4

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3(S3

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SH

BSH

RL

SHG

12

3

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N S

W

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From Skid Control ECU<16–8><17–5>

Po

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33

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12

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owl s

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10

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21

3

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F

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11

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19

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20IB

114

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316

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G–O

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7 2A

C 9HEADLIGHT BEAMLEVEL CONTROLWARNING LIGHT[COMB. METER]

17 11

AA 2F7

2B520

J 7

JUN

CTI

ON

CO

NN

ECTO

R

BR BR W–B

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 4

A

8 2

1F9 5

1G

+1

WF

OFF

7

3 421

9 IS 300

HornFront Wiper and WasherPower Source

2

ACC

IG1AM1 4

1D2

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1O1

11

1

1

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1D1

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ID

17

L–B

16

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11

2

1

3

5

2 2

2 2

6

1

G W

G W

L

L–R

L–R

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1

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21

12

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L–B

W–B

L–W

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2

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RN

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H14HORNRH

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1

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OFF

MIST

INT

MIST

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HI

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M

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L–R

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EC Left fenderapron

W–B

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W–B

W–B

L

L

L

+2 E S

B

2M5

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C12

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RN

SW

[CO

MB. SW

]

To T

heft Deterrent

EC

U<

11–4>

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INT

LO

HI

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L–RTo A/C ControlAssembly<24–6>

9 IA1

To Headlight

Cleaner

Control

Relay<7–3>

L–Y

L–YL–Y

M



12

34

34

21

( Con

t. n

ext

page

)

1

120A

ALT

20A

ECU

–B1

1

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X+

11

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TER

Y

2M6

7. 5

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OM

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2

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RA

DIO

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L–B

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W

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L–Y

B–L

L–Y

R–Y

L–R

L–Y

L–W

L

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20A DOOR

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BA

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ont f

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See Combination Meter System<22–3>

13

2002 LEX

US

IS 300 (E

WD

451U)

M

7 865

(Cont. next page)10 IS 300 (Cont’ d)

IH

GF

ED

CB

A

2

1

4 BG1

2 BG1

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2 ID2

2

1

2

1

8 1L 1N7

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Front floorpanel LH

BJ

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PCT D U E PCT D U E PCT

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SD SU SD SU SD SU

2 2

1

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1 1

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L–Y

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P 6POWER WINDOWCONTROL SWFRONT RH

P 8POWER WINDOWCONTROL SWREAR RH

P 7POWER WINDOWCONTROL SWREAR LH

P11POWER WINDOWMOTOR FRONT RH

P13POWER WINDOWMOTOR REAR RH

BA

BODY ECU

, B 6B 5

3

E

I11IG

NITIO

N KE

YC

YLIND

ER

LIGH

T

D10

DO

OR

CO

UR

TESY

LIGH

T FRO

NT

LH

* 4 : w/o Moon Roof* 3 : w/ Moon Roof* 2 : w/o Power Seat* 1 : w/ Power Seat

DO

OR

OFFO

N

W

1L5

21 IB1

L–Y

C

C

J13JU

NC

TION

CO

NN

EC

TOR

From C

enter Airbag

Sensor Assembly

<18–3>

C

P–B

(*1 )

P–B(*2 )

P–B(*1 )

P–B

P–B

4

1

W–B

M 3

PERSO

NAL LIG

HT

[MO

ON

RO

OF C

ON

TRO

L SW

] (*3 )

W(*4 )

1

2

P 5PE

RSO

NA

L LIGH

T

E

C

R–W

F

F

W 4

WIR

E TOFFC

HO

LDER

1N2

A

A

L–Y

W(*4) (*3 )

W 4WIRE TOFFC HOLDER

A A

H

H H


W(*4)

H

(S/D)

W–B

(W/G

)

(S/D)

IJ11

(*1 )

A

W

M12

D U

2 5G R

P12POWER WINDOWMOTOR REAR LH

H

W–B W–B W–B

W–B

W–B

W–B

(W/G

*2 )

(S/D *2 )

(W/G

*2 )

W–B

L–YLG

L–BB–L

L–Y

W–B(S/D *2)

W–B(S/D)W–B

W–B(S/D)W–B(W/G)

L–RR–YL–YG

L–BB–L

W–B(W/G)

W–B (W

/G)

W–B(S/D *2)

2002 LEX

US

IS 300 (E

WD

451U)

M O

VE

RA

LL ELE

CT

RIC

AL W

IRIN

G D

IAG

RA

M

11 12109

(Cont. next page)10 IS 300 (Cont’ d)

KJ

I

DE

G

C

F

B

1B51H7

M

D

M

W–B

Cowl sidepanel LH

ID

M

M M

1B101B81N6 1B9 1H10 1H9 1I1 1I5

2L2 2L1 2K1 2K2

2H12H2

3 BB1 4 BB1 BB18

3 BA1 4 BA1

8 BA1

14 BC2

4 A

9 BB1

9 BA1

BLLeft quarterpanel LH

DE

F

HI

A

M ultiplex Commun ication System

R–G

W–B

BECU BCTY MPX3 ACT+ ACT–

BDM DCTY TX

PW PWR PWL D U LMT PLS SGND KL KUL LSWD

4 1 2 20 8 13 12 11 6 15 10

2

2 11 6 9 10

5 16 18

2 1 4 3 5 4 3 1 5 6

P 9POWER WINDOW MASTER SW

P10POWER WINDOW MOTOR FRONT LH

D20DOOR LOCK MOTOR, DOOR KEY LOCK ANDUNLOCK SW ANDDOOR LOCK DETECTION SWFRONT LH

To Moon RoofControl ECU<12–2>

R–Y

R–Y

B–L

L–B

L–R

G R

W–G

W

BR–W

G–R

G–B

L–B

R–G

Y–R

W–B

G–Y

R–W

L–R

LSR

1 2

B

4 1 2 4 3 4 1

C

A

3 3 2

C C

G–Y

R–W

L–R

G–Y

R–W

G–Y

R–W

L–RL–R

L–RL

W–B

W–B

W–B

W–B

D19DOOR LOCK MOTORAND DOOR LOCK DETECTION SWREAR RH

D17DOOR LOCK MOTORAND DOOR LOCK DETECTION SWFRONT RH

D18DOOR LOCK MOTORAND DOOR LOCK DETECTION SWREAR LH

B 5 B 6, BODY ECUA B

LIMIT S

W

PU

LSES

ENSO

R

LOC

K

UN

LOC

K

LOC

KD

ETEC

TION

LOC

KD

ETEC

TION

LOC

KD

ETEC

TION

LOC

KD

ETEC

TION


L–R

L–R

G–Y

R–W

G–Y

R–W

W–B

D


1L10

5 1G

EC Left fenderapron

W–BBA

AJ 5JUNCTIONCONNECTOR

G–Y

R–W

13 BC2

L–R

W–B(S/D)

2 1B1B7

GND

12

W–B

7 1L

E

9

W–B

W–B

G

1A2

C

W–B

W–B

J16JU

NC

TION

CO

NN

ECTO

R14 B

LSWP

5 II1

L–R

4 ID2

R–W

L–R

20

ACTD

B

B

BKFront floorpanel RH

W–B

A

H

W–B(W/G)


A

B

W–B(W/G) W–B(W/G)

(S/D

)

(S/D)

W–B

(W/G

)

A

W–B(W/G)

B16

1

L–Y

B15

L–O

2

K 1

KEYLE

SS BU

ZZER

13 IA1 5 IA1

L–Y

L–O

L–O

L–O

BU

ZZER

BZR2 BZR

10 B B1

HAZ OBD2

G–W

W

From FLSH

Relay

<4–3>

To Data Link C

onnector 3<

2–5>

B–LL–BG

L–YR–YL–R

W–B(W/G)W–B(S/D)

W–BW–B(S/D)

W–B(S/D)

GL–Y

W–B

W–B(S/D)W–B

W–B(S/D)W–B

GL–YW–B

W–B(W/G)W–B

W–B(W/G)

W–B

W–B

W–B(W/G)

2002 LEX

US

IS 300 (E

WD

451U)

M

1613 1514

10 IS 300 (Cont’ d)

HI

A1 A2

2

1

8 A 7 A 19 B

2F7

2K54 2K 2B5

1

2

6 B

1 1 1 1

8 IH1

8 B 6 A 5 A

M ultiplex Commun ication System

L–Y

PRG RDA TR+ LGCY GND2 KSW PCTY DCTY RCTY

E +B

PRG RDA

3

AA

D

1

B

C C

A

R–B

L–W

R–Y

RL–Y

L–Y

W–B

W–B

W–B

W–B

W–B

W–B

B–YB

–Y

R–B

R–G

R–L

R–B

R–G

R–L

R–L

W 3

WIR

ELESS D

OO

R LO

CK

CO

NTR

OL R

EC

EIVER

J12(S/D)J17(W/G)JUNCTIONCONNECTOR

J12(S/D)J17(W/G)JUNCTIONCONNECTOR

L 7LU

GG

AG

E CO

MPAR

TMEN

TLIG

HT

D13

DO

OR

CO

UR

TESY SW

FRO

NT R

H

D12

DO

OR

CO

UR

TESY SW

FRO

NT LH

D15

DO

OR

CO

UR

TESY SW

REA

R R

H

D14

DO

OR

CO

UR

TESY SW

REA

R LH

U 1

UN

LOC

K W

ARN

ING

SW

From E

ngine Control

Module<

2–12>

J12 (S/D)

J17 (W/G

)JU

NC

TION

CO

NN

ECTO

R

B 5 B 6,

BODY ECU

A B

IH

B–Y

W–B

UN

LOC

K

LOC

K

3

6 5

9 B

PMUL

G–B

7 B

PML

G–R

17 II1 18 II1

19 II1

G–B

G–R

BRBR

BR

A

A

J 7JU

NC

TION

CO

NN

ECTO

R

D16

DO

OR

LOC

KC

ON

TRO

L SW R

H

1

2

D 9

DIO

DE (Luggage

Com

partment Light )

From Theft D

eterrent ECU

<11–3>B

–YB B B

B


15 BC2

R–L

3 BC2 11 BC2

R–B

GR

–LG

R–L

R–B

(S/D)

GR

–L(S/D

)

(W/G

)

(W/G

)

(W/G

)

(W/G

)

BC22

13 B

BDSU

2 IB1

6 BJ2

7 BK1

BNRight side of theback panel lower

Cowl sidepanel RH

W–B

(W/G

)B–R

(W/G

)B

–R(W

/G)

B(W

/G)

1

2

B(W

/G)

B13BAC

K DO

OR

OPE

NER

SW

W–B

(W/G

)

3 B 1 B (W/G)

4 B 2 B (W/G)

1 A 2 A (S/D)

W–B

W–B

(W/G

)

(W/G

)

(S/D)

L–Y(W/G)

W–B

L–Y(W/G)

L–Y (S/D)

W–B(W/G) (W/G)

1 B 3 B (W/G)

4 A (S/D)1 A

2 A (S/D)3 A

5 B 4 B (W/G)2 B

R–Y

G–Y

LUG

GA

GE C

OM

PARTM

EN

TD

OO

R O

PEN

ER

RELAY

AL 6

FG

DE

CB

A

LUG

GA

GE C

OM

PARTM

EN

TD

OO

R C

OU

RTES

Y SW AN

D O

PEN

ER M

OTO

R

AL 4

B11B

BAC

K DO

OR

CO

UR

TESY SW

AND

OPEN

ER M

OTO

R

BACK D

OO

R O

PEN

ER R

ELAY

BB12

W–B

L–Y (W/G

)

W–B

(S/D)

W–B (W

/G)

W–BW–B(W/G)

W–BL–YG

W–BW–B(S/D)

W–BW–B(S/D)

2

5

G W–B

(W/G

)

M

(S/D

)

B

B

R–Y

(S/D)

D D

C(W/G)(S/D)

(W/G)(S/D)



12

34

34

21

11

IS 3

00 1

L–R

120A

ALT

20A

EC

U–B

1

11

1D2

1O1

10A

ECU

–IG

2

ACC

IG1

AM1

41D

12M

6

1A4

10A

19A

B7

8B

1A

2A

4B

9A

20A

21A

5IE

14

IE1

3IE

1

13A

12A

14A

OFF

T

HEA

D

TAIL

AUTO

HA

EL

B12

18A

8B

4A

A5

12IA

311

IB1

21

12

ECLe

ftfe

nder

apro

n

BLLe

ft qu

arte

rpa

nel L

H

22A 1A

2

1G5

1A1

IDC

owl s

ide

pane

l LH

ECLe

ft fe

nder

apro

n

B–L

W

B

B–Y

R–Y

R–W

G–W

R

Y

BR

R

Y

BR

R

R–Y

G–Y

L–B

L

B–W

W–B

L–B

L

B–W

W–B

W–B

W–B

21

2

14

3

A

12

1

CLT

BC

LTS

CLT

ET

HA

IND

DSW

HLU

GE

IGK

SWM

PX1

MP

X2H

EAD

TAIL

HO

RN

Po

we

r S

ou

rce

Th

eft

De

terr

en

t

T 5

T 6

,

THEF

T D

ETER

REN

T E

CU

AB

CLT

B


CLT

SC

LTE

From Engine Control Module<2–6>

BATT

ER

Y

A28

AU

TOM

ATI

C L

IGH

TC

ON

TRO

L S

ENSO

R

I12

IGN

ITIO

N S

W

, C10C 9 A B

SECURITY INDICATORLIGHT[COMB. METER]

To Unlock WarningSW<10–16>

J15

JUN

CTI

ON

CO

NN

ECTO

R

From Diode (Fog Light)<3–4>

From TAIL Relay<26–1>

From HORN Relay<9–4>

E 9ENGINE HOODCOURTESY SW

L 5LUGGAGECOMPARTMENT DOORKEY UNLOCK SW

LIGHT CONTROL SW

Au

tom

ati

c L

igh

t C

on

tro

l a

nd

Lig

ht

Au

to T

urn

Off

2F4 11

A

W–R

+B1

7. 5

AEC

U–B

2

AA

L–R

B–R

B–R

J 6

JUN

CTI

ON

CO

NN

ECTO

R

B

3B SH

G

G

1413

12

C11

CO

MBI

NA

TIO

N S

WW

–B16

AA

J 5

JUN

CTI

ON

CO

NN

ECTO

R

W–B

2E2

2A10

2B

11IA

1G–Y G–Y

SH–

1

T 1THEFT DETERRENT HORN

W

W–B

2I4

2C1

1

40A AM1

15A DOOR DL

WG

W–B

3IG

3L–B

2F7

2B5

IHC

owl s

ide

pane

l RH

2A3

L–B W–BBRBR

AAJ

7JU

NC

TIO

NC

ON

NEC

TOR

6A

G–W

NA

V1From Multi–Display<25–3>

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

12 IS 300

1

IG

10ARADIONO. 2

120AALT

1

1D2

30A S/R

OO

F

1O1

1N8

+B

10AECU–IG

2

ACC

IG1AM1

3

4

1D1

1N3

BJ

1D6

1B12

9 ID2 ID210

M M

4 II1 13 II1

8 ID2

12 II1 MM

ID Cowlsidepanel LH

1G5

1L10

P ower S ource M oon Roof Remote Control M irror

2

2

4 3 10

5 2 6 3 4

1

C

MHLMVL

7

6

M+

8 7 6 8

1

1

MHR

5 6

MVR

1 2

M+

7 8

P–B

C

3 6 10

UP

2

CLOSE

9

OPEN

J11JU

NC

TION

CO

NN

ECTO

R

C

OPERATIONSW

SELECTSW

DOWN

B–L

E

W

W

4

W

W

B–R

R–G

R

R–W

HL

L–R

L–W

HR

W–B

W–B

VL

W–B

W–B

VR

W–B

M+

P–B

L–Y

B

P–B

GR

I12IGNITION SW

P–B

BATTERY

L–YDCTY

L

L–Y LL

P–G

P–B

P–G

P–L

W–B

W–B

P–L

W

R

L–R

R

P–B

W–B

UP DOWN CLOSE OPEN E1 GND

From BodyECU<10–10>

R13REMOTE CONTROL MIRROR SW

M 2MOON ROOFCONTROL ECU

M 3MOON ROOF CONTROL SW

1L7

1B7

W–B



D

AA

D

R11REMOTE CONTROLMIRROR LH

EC Leftfenderapron

W–B

R12REMOTE CONTROLMIRROR RH

LEFTDOWN RIGHTDOWN/RIGHT

UP/LEFT

UP

LEFTRIGHTLEFTRIGHT

1 IJ1

Front floorpanel LH

1N4 1N1

1A3 1A6

17 ID212 ID2 8 II1 20 II1

B

B

H

H

B–R

B–RW

W W

W–R

G–R

G–R

W–R

G–R

W–R

W–R

WW

–B

B–R


1

IG

EC+ EC–

I14INNER MIRROR

2 3

C G

C G


W–R G

–RG

–R

W–R

G–R

4 5 4 5

EC+ EC– EC+ EC–

R11REMOTE CONTROLMIRROR LH

R12REMOTE CONTROLMIRROR RH

Automatic G lare–Res istantEC M irror

4

W–B

E40A AM1



12

34

34

21 BAT

TER

Y

13

IS 3

00

1

2

11D2

11O1

L–R

Y–G

L L–R

Y–R

Y–G

2

ACC

IG1

AM1

4

MM

15A

SEAT

HTR

1D1

1L2

1L6

R–L

4IH

4

2B5

2F7

BJ

Fron

t flo

orpa

nel L

H

2

M

33

A

16

22

6

A

A

WL–

RL–

R

BR

B–LWW

M

BB–R

W–R

W–G

B

W–R

W–B

W–BBRBR

BR

R–L

B–W

B–W

Po

we

r S

ou

rce

Po

we

r S

ea

tS

ea

t H

ea

ter

P21

POW

ER S

EAT

MO

TOR

( Driv

er’

s Se

at S

lide

Con

trol)

P18

POW

ER S

EAT

MO

TOR

( Driv

er’

s Se

at F

ront

Ver

tical

Con

trol)

I12

IGN

ITIO

N S

W

10IB

3

3BG

1

R–G

R–G( *1)

( *1)

R–G(*2)

R–G

IHC

owl

side

pane

lR

H

BK

W–B

P19

POW

ER S

EAT

MO

TOR

( Driv

er’

s Se

at R

ear

Ver

tical

Con

trol)

P20

POW

ER S

EAT

MO

TOR

( Driv

er’

s Se

at R

eclin

ing

Con

trol)

1BG

1

REA

R

DO

WN

FRO

NT

FRO

NT

UP

UP

DO

WN

REA

R REARVERTICAL

FRONTVERTICAL SLIDERECLINING

(*2)

* 1

: w/ P

ower

Sea

t*

2 : w

/o P

ower

Sea

t

S 9SEAT HEATER(Driver’ s Seat)

S10SEAT HEATER(Front Passenger’ s Seat)


S 3SEAT HEATER SW(Driver’ s Seat)

S 4SEAT HEATER SW(Front Passenger’ s Seat)

Fron

tflo

orpa

nel

RH

2 3 8 7 5 10 6 9

P16POWER SEAT CONTROL SW (Driver’ s Seat)

W

1

1 1 2 2

2 2 1 1

2L–

R

Y–G

L L–R

Y–R

Y–G

P17POWER SEAT CONTROL SW (Front Passenger’ s Seat)

MMM

W

M

BB–R

W–R

W–G

B

W–R

P25

POW

ER

SEA

T M

OTO

R( F

ront

Pas

seng

er’

s Se

at S

lide

Con

trol)

P22

POW

ER

SEA

T M

OTO

R( F

ront

Pas

seng

er’

s Se

at F

ront

Ver

tical

Con

trol)

P23

POW

ER

SEA

T M

OTO

R( F

ront

Pas

seng

er’

s Se

at R

ear V

ertic

al C

ontro

l)

P24

POW

ER

SEA

T M

OTO

R( F

ront

Pas

seng

er’

s Se

at R

eclin

ing

Con

trol)

RE

AR

DO

WN

FRO

NT

FRO

NT

UP

UP

DO

WN

RE

AR

REARVERTICAL

FRONTVERTICAL SLIDERECLINING

3 7 8 10 5 6 9

1

1 2 1 1

2 1 2 2

44

W–B

( *1)

40A AM1 120A ALT

12G10

2M7

W

1BH

1

12IH

4 W

W

W

3BH

1

R–L

R–L( *1)

( *1)

(*2)

BG1

2

W–B

W–B

( *1)

W–B

( *1)

W–B

(*2)

BH1

2

( *1)

W–B

( *1)

W–B

( *1)

W–B

IG RE

ERIG

12

12

2

30A P/SEAT

1

7IB

3 2I9

W WW


MEMO



12

34

B–R

34

21

14

IS 3

00

120A

ALT

20A

AM

225

AEF

I

1

11O 1

1

I12

IGN

ITIO

N S

W

1

40A

AM

1

1D2

2

ACC

IG1

IG2

ST2

AM1

4 67

AM2

5 3

1 24

A

7. 5

AIG

N

2A8

2H13

13A

17A

2

EFI

REL

AY

2

22

21D

20D

23D

22D

32C

24C

B33

32B

25E

24E

35B

3B

12A

4B

6A

5A

19D

18D

11D

D10

35D

34D

27D

34B

4E

1A

B–Y

IHC

owl s

ide

pane

l RH

2B4

2B11

AW W–R

L–R

B–R

B–R

L–R

B–Y

B–O

W

W–R

B–Y

B–L

W–BW–B

B–R

B–Y

B–O

B–O

RG

R–L

G

L–Y

R–L

B–R

B–R

Y

G–Y

G–W

LG–B

B–Y

R–B

GR

BR

BR

W–B

BR

+B+B

2S

1S

2S

LU+

SLU

–S

LT+

SLT

–O

ILE2

E03

EOM

BATT

MR

ELIG

SWN

CO

+N

CO

–SP

2+SP

2–TH

ATH

WVP

AV

PA2

VTA

VTA

2VC

TCST

AST

PB

A

EN

GIN

E C

ON

TRO

L M

OD

ULE

, E

4E

3

21

1

2

12

E2

612

OT

410

SLT–

28

SLT+

17

SLU

–

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2002 LEX

US

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2002 LEX

US

IS 300 (E

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12

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00 BATT

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Y

AM2

63

AM1

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IG2

IG1

ACC

72

2G3

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1

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1

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1

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10A SRS–ACC

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11 2A

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To Data LinkConnector 3<2–9>

3B LA

6B

AC

C

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19B TC

12B SIL

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–

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+

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2A PL+

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6A

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2

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43

21

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12

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IDC

owl s

ide

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l LH

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l RH

R B–R

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R–W

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Y

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12

12

12

21

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W

A10

AIR

BAG

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ON

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ag A

ssem

bly)

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LH

S14

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TEN

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RH

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4C

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TER

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Po

we

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(*2) (*2)

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t


3C

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1

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

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GR

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ANITY

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T LH]

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H

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12

34

34

21

20

IS 3

00

1

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W

R

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Y

B

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S 7

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12

12

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1

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13

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W

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From Multi–Display<25–2>

To Navigation ECU<25–2>

From Navigation ECU<25–3>

From Navigation ECU<25–1>

R–L

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( *1)

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( *1)

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igat

ion

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/ LE

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2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

21 IS 300

1

I12IGNITION SW

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40A R

R D

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11

1

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3

4

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4

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2

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1

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1

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1D6

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3

4

2F7

Power Source Rear W indow Defogger and M irror Heater Shift Lock

L–R

R R

R–L

2K3

2B5

IH Cowl side panel RH

W–B

B–LWW

W B–R B–R

W

From Engine C

ontrol Module

<14–7>

From A/T Indicator Light SW

[Park/N

eutral Position SW]<

14–7>

W–B

W–B

W–B

G–R

G–R

G–R

L–R

BRBR

B–R

GR

GR

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LG–B

2

2 2

1

1

1

D

5

A

4 10 1 6

1 1

D

8 9

A

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IG ACC STP NSSD MT3

10AGAUGE

BATTERY

RR DEFRELAY

2

2

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NO

ISE

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DS )

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J11JU

NC

TION

CO

NN

ECTO

R

J10JU

NC

TION

CO

NN

ECTO

R

From Stop Light SW

<6–4>

<26–4>

U 1KEY INTERLOCKSOLENOID[UNLOCK WARNING SW]

S 5SHIFT LOCKCONTROL ECU

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2L8

B

1L101G5

ID Cowl side panel LH


A

G–R

G

G–W

L–R

L

SHIFT LOCKCONTROL SW

3

2

1

4 5

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P1

P

P2

SLS+

SLS–

To Body EC

U<

10–1>

N 2NOISE FILTER(Rear Window Defogger)

R12

MIR

RO

R H

EATER

RH

[REM

OTE C

ON

TRO

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R R

H]

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RO

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EATER

LH[R

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1A2

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A

A


To A/C

Control

Assem

bly<24–6>

G–O

7 1L

W–B

1B7

2

1

5

3

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3

21

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8 IB3

B(W

/G)

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(W/G

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B

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3 BK2

ECLeft fenderapron

W–B

2 BK2

BM

W–B

W–B

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(S/D

)B

(S/D

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1 A

1 B

RE

AR W

IND

OW

DE

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GE

R

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R19

R20

,

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ON

T WIN

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R

F ront W indow Deicer

B(W

/G)

(W/G

)

(W/G

)(W

/G)

(W/G

)

Left side of theback panel Upper



12

34

34

21

( Con

t. n

ext

page

)22

IS

300

1

20A

ECU

–B1

120A

ALT

11

I12

IGN

ITIO

N S

W

12C1

2M6

1O1

7. 5

AS

RS–

B10

AM

PX–B

40A

AM1

21D

2H5

2G3

11D

2

ACC

IG1

AM1

4

1H7

1E2

1H2

17A

15A

16A

5 BC2

1B

19A

12A

IEFr

ont f

loor

pan

el c

ente

r LH

TACHOMETER

SPEEDOMETER

MOMENTARY FUELCONSUMPTION

VOLT

WATER TEMP.

FUEL21

A20

A

3A

5B

14AA

13

4BC

2

1210

B 1

10A

GAU

GE

BR–W

C 9

C10

,

CO

MBI

NA

TIO

N M

ETE

R

AB

BA

A/C

CO

NTR

OL

ASS

EMB

LY, A

13A1

2

See VSC System orABS and TractionControl System<16–10><17–7>

W

B

W

B–L

W

R–Y

LG–B

R–L

R–Y

LG–B

L–R

R–Y

DOOR

BR–W

12

YY

Y–R

L

O

B 5

B 6

,

BO

DY

ECU

AB

122

FRM

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FE

P 3

PAR

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SW

F15

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ND

ER

F16

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ub)

1

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TER

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PKB

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we

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ou

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mb

ina

tio

n M

ete

r

LG–B

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MP

X+

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32

O

O

78

T 6THEFT DETERRENT ECU

C C

C C


Y–R Y–R

Y–R

Y–R

From

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d C

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6–7>

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time

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t Rel

ay( M

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4>

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BUZZ

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ulti–

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2>

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32

1

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2

(M/T)R

(M/T)R–Y

(M/T)R–L

DDJ

2JU

NC

TIO

NC

ON

NE

CTO

R

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( M/T

)R

–L( M

/T)

(M/T)R–L

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VEH

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SPE

ED S

ENS

OR

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bina

tion

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er)

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3

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–L( M

/T)

From

Nav

igat

ion

ECU

<25

–2>

From

Eng

ine

Con

trol

Mod

ule<

2–11

>

From

Mul

ti–D

ispl

ay<

25–2

>

J 7

JUN

CTI

ON

CO

NN

ECTO

R

W–L

( A/T

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W–L

( M/T

)

W–L

( M/T

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W–L

( A/T

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W–L

14A

BFrom EngineControl Module<2–4>

W–L

( M/T

)

R

M

2002 LEX

US

IS 300 (E

WD

451U)

M

5 6 7 8

22 IS 300 (Cont’ d)

Combination M eter

8 B 2 A 3 A 4 A A22

5 A 6 A 10 A18 A 8 A 6 B 7 A 9 A 3 B 4 B

See Turn Signal andH

azard Warning Light

System<

4–3>

See Illumination

System<

5–2>

See H

eadlightS

ystem<3–3>

See Theft Deterrent System

<11–3>

See Engine Control and

Engine Imm

obiliser System<

2–3>

See Taillight andStop Light System

<6–3>

<26–3>

See SRS S

ystem<

18–3>

See Illumination

System<

5–2>

See VSC S

ystem (w

/ VSC)or

ABS and Traction C

ontrolSystem

(w/o VS

C)<

16–11><

17–8>

See Headlight

System<

3–3>

Cowl side panel RH IH

TUR

N LH

TUR

N R

H

BEAM

CH

ARG

E

OIL P

RESS

UR

E

OIL LE

VEL

SEAT BE

LT

SN

OW

EC

T PWR

FUEL

CR

UISE

BRA

KE

ILLUM

INATIO

N

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REAR

LIGH

TS

MA

LFUN

CTIO

NIN

DIC

ATOR

LAMP

ABS

TRA

C O

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SLIPSECU

RITY

BR

C 9 C10,

COMBINATION METER

A B

9 B

To Daytim

e Running Light

Relay (M

ain )<3–4>

Y

AJ 7JUNCTIONCONNECTOR

BR

11 A

See Headlight Beam

LevelC

ontrol System<

8–2>

BEAM

LEVEL

A

W–B

2F7

2B5

VSC

5 B

See VSC

System (w

/ VSC

)orABS

and Traction Control

System(w

/o VSC

)<16–11>

<17–8>

See VSC

System<

16–11>



12

34

1

34

21

23

IS 3

00

30A

RD

IFA

N

30A

CD

SFA

N

120A

ALT

40A

AM1

10A

ECU

–IG

2IG

1AM

1

3

4

21

35

21

53

4

1H3

33

33

33

W–L

3

11

1D1

2H10

2A7

33

33

3


3

21 M

12 M

ECLe

ft fe

nder

apr

onIH

Cow

l sid

e pa

nel R

H

23

11C

A

2

AA

CC

2

B–LW

W

L

W

B–R

L–B

W–B

L–W

L–B

W–B

W–BL–B

L–B

L–W

L–R

W

L L–W W–B

L–B

L–R

L–R

WL

B–R

L–W

L–Y

L–B

B–R

B–R

B–R

L–B

W–B

L–W

W–B

W–B

W–B

A 4A/C SINGLEPRESSURE SW

D 7DIODE(A/C)

R 1RADIATORFAN MOTOR

W 2WATER TEMP. SW

FAN NO. 3RELAY

FAN NO. 1RELAY

A 2A/C CONDENSERFAN MOTOR

FAN NO. 2RELAY

BAT

TER

Y

I12

IGN

ITIO

N S

W

Po

we

r S

ou

rce

Ra

dia

tor

Fa

n a

nd

Co

nd

en

se

r F

an

25

11

1

22

2

To A

/C C

OM

PR

elay

<24

–2>

13

ACC

1

11D2

2 1O1

C

L–B

J 3

JUN

CTI

ON

CO

NN

ECTO

R To Engine ControlModule<2–11>

L–B 8

EA3

1N3

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1IJ

1

BJFr

ont f

loor

pan

el L

H

W–BB–R W W W–B

41


I14COMPASS[INNER MIRROR]


IG ECo

mp

as

s


MEMO



12

34

34

21

( Con

t. n

ext

page

)24

IS

300 1

20A

EC

U–B

112

0AAL

T

10A

MPX

–B40

AAM

140

AH

EAT

ER

2

ACC

IG1

AM1

3 4

21

35

2M6

1O1

2C1

2D2

122I

33

HTR

RE

LAY

11

2I6

1D2

2H12

3

A/C

CO

MP

RE

LAY

3

10A

A/C

1H12

1A9

10A

RAD

ION

O. 2

10A

ECU

–IG

1D1

1H3

1D6

M1

2

3A

2A

1A

1B

2B

2IF

21

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3IF

2

25A

A18

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FE

Inst

rum

ent p

anel

rein

forc

emen

t RH

IGE

CLe

ft fe

nder

apr

on

1

A B C

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we

r S

ou

rce

Au

tom

ati

c A

ir C

on

dit

ion

ing

BATT

ER

Y

B–LB

WW

R–Y

B–R

R

21

L

L

L

V

W–B

R

B

W–B

W–BL–Y

LG–R

BR BR LG–R

W–B

GR

W

L–R

L–RR

R–Y

B–R GR V L

L

V

W–B

GR

122

A

1

2

1

211

2

4

1

A

B 2

BLO

WER

MO

TOR

J10

JUN

CTI

ON

CO

NN

EC

TOR

I12

IGN

ITIO

N S

W

W

A 1A/C AMBIENT TEMP. SENSOR

A 4A/C DUAL PRESSURE SW

BLOWER MOTORCONTROLLER

BAB 3 B 4,

GN

DSI

+B

E2TA

MPR

E

M–

M+

To Engine ControlModule<2–12>

From Diode(A/C)<23–3>

1G9

L–R

B

MPX

1

IA3

1

DL

L L

21

53

5E

A1

A 3A/C MAGNETIC CLUTCHAND LOCK SENSOR

31 2 E

AFr

ont s

ide

of th

ein

take

man

ifold

P P

BR

L–W

L–W

W–L

34E

LCK1

W–L

E 3

E 4

,

ENG

INE

CO

NTR

OL

MO

DU

LE

AB

E 7

, E

L–R

CC


AAA

L–W


2002 LEX

US

IS 300 (E

WD

451U)

M

5 6 7 8

24 IS 300 (Cont’ d)

F

E

A

B

C

R–Y

B–R

GR

V

L

7 A 16 A 8 A 1 B10 B 5 A 4 A 13 A 3 A

2I5

2H10

See Multiplex

Com

munication

System<

10–3>

See ElectronicallyC

ontrolled Transmission and A/T

Indicator System(A

/T ) orAB

S and Traction Control

System(M

/T )<14–7>

<17–7>

See Turn Signal and

Hazard W

arning LightSystem

<4–4>

See Com

binationM

eter System

<22–3>

GR

12 A 10 A 17 B 5 B 8 BB6B20 3 B 12 B B7

M M

8 IF1 2 IF1 3 IF1 1 IF1 10 IF1

4 IF1

9 IF1 6 IF1 7 IF1

15 B 14 B 13 B

1 IE1

GR

–R

18 A

2I1

2B5


A12 A13,

A/C CONTROL ASSEMBLY

A B

A utomatic A ir Conditioning

1 1

B

P–B

B

B

LG–R

B

1 5 3

IE1

6

2

7 1 5 3 6 7

22

B

B

BR–W BR–W

GR GR

B–R

R–Y

B–R

PKBSNOWPWRP–S/BMPX+

BR–W

HAZD

V L

L–W

+B

GR

–L

IG

BR–W

ACC

GR

–R

R–Y

GND

L–R

P–L

AMC

J10JU

NC

TION

CO

NN

ECTO

R

J 8JU

NC

TION

CO

NN

ECTO

R

AMH

B–R

BR

–W

TP

GR

–R

BR–W

TE

GR

–R

GR

–L

AOF

L–W

BR–W

AOD

R–Y

GR

S5

L–R

P–L

TPM

BR

–W

GR

SG

GR

BR

–W

TS

V–W

B–R

TR

V–W

LG–R

HR

P–B

W–B

BLW

W–B

A14A/C

RO

OM

TEMP.

SENSO

R

A23AIR VENT MODE CONTROLSERVO MOTOR

A22AIR MIX CONTROLSERVO MOTOR

A15

A/C

SOLA

R SE

NSO

R

A/CTH

ERM

ISTOR

A1

DL

MPX–

L

See ElectronicallyC

ontrolled Transmission and

A/T Indicator System<

14–6>

M

1 5 3 6 7

GR

–R

GR

–R

BR–W

Y–G

R–W

A21AIR INLET CONTROLSERVO MOTOR

B16

GR

–R

TPI

B11

Y–G

AIR

B2

R–W

AIF

B

BBR–W

BR–W

GR–R

GR–R

6 A 11 A

From M

IR H

TR R

elay<

21–3>

From Front W

iperand W

asher SW

[Com

b. SW]<

9–1>

WIPMHTR

G–O

L–R

GR



12

34

25

IS 3

00

2 7

ACC

IG1

IG2

ST2

AM1

3 4 8

AM2 I1

2IG

NIT

ION

SW

1D2

2E7

40A AM1

1O1

2C1

7. 5A TV

2 1

W

W

W–R

11

1

2 121

1

B–L

120A ALT

20A AM2

20IA

3

BATT

ER

Y

1D4

1E1

7. 5A STARTER

1D1

1A4

10A ECU–IG

3AIG

B–R

AA

B–R

A15

ST1 B–W

B–W(M/T)

(A/T)

From Clutch Start SW<1–2>

J 6JUNCTION CONNECTOR

B15

MU

TE

9B +B

A1

+B1 V

V V

5IH

3

V

L–R

B–W

W

W–R

A25

GN

D1 BR

IFFr

ont f

loor

pan

elce

nter

RH

B17

GN

D

BK

Fron

t flo

or p

anel

RH

BB

W–B(S/D)

W–B(S/D)

W–B(W/G)

J16

JUN

CTI

ON

CO

NN

ECTO

R

R–L

1IH

3 R–L

To S

tere

o C

ompo

nent

Ampl

ifier

<20

–2>

<28–

4>

B5SP

D W–L To CombinationMeter<22–2>

B14

REV

R–B

IH3

4

R–B

From

Bac

k–U

p Li

ght S

W[P

ark/

Neu

tral P

ositi

onSW

]( A/T

) or

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–Up

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t SW

( M/T

)<

6–4>

B2A

UO

+ P

IH4

6

P

B11

AU

O– V

IH4

5

V

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wee

ter L

H<

20–3

><

28–2

>

BR

A5G

TX+ Y–B

A18

GTX

– Y–RTo StereoComponentAmplifier<20–2><20–3><28–4>

A17

PKB Y–R To Parking Brake

SW<22–4>

To CombinationMeter<22–2>A

4SP

D W–L

To TheftDeterrent ECU<11–4>

A7

DR G–W

B6

VGB

8SYN

CB

3B

B7

GB

2R

B1

VR

6A VG

8IH

3

8A

SYN

CB

9IH

3

3A B

Y10

IH3

7A G

G

11IH

3

2A R

R

12IH

3

1A VRW

13IH

3

10B

AUI–G

13IH

4

1B

AUI+G–B

14IH

4

W

R

G

Y

B

(Shielded)

(Shielded)

(Shielded)

(Shielded)

1D6

1A9

10A RADIO NO. 2

A14

AC

C GR

GR

10A

TX1–G–B

3IH

3

5A

TX1+G–R

2IH

3

B10

CTX

–B

5CTX

+ G–R

G–B

AA

AA

GR


A16

TC

R–W

6IH

3 R–W

G–B G

From

Ste

reo

Com

pone

ntA

mpl

ifier

<20

–3>

<28

–3>

A22

SGD

1A

10R

E1

41

3

SG

ND

RE

AC

C

18B

ACCGR

1IH

1

6GN

D BR

BR

GR

O

(Shielded)

(Shielded)

J10JUNCTION CONNECTOR

R15REMOTE CONTROLLER(Navigation)

RR

B–W(A/T)

M 4

M 5

, M

ULT

I–D

ISPL

AYA

B

N 4

N 5

,

NA

VIG

ATI

ON

EC

U

AB

GR

Po

we

r S

ou

rce

LE

XU

S N

av

iga

tio

n S

ys

tem

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

26 IS 300

TAILRELAY

1

1

2

1

5

3

10ATAIL

1 1O 1F2 1H1312 1K

2

1

2

1

2B1

2H6

GG

ECLeft fenderapron

IHCowl sidepanel RH

6 1K

2

ACC

IG1

2

AM1 4

1D 1D1 1E2

17 A

6 B

5 IB1

1K3 1F7

7 1G

To EngineC

ontrol Module

<2–12>

To Shift LockC

ontrol ECU

<21–4>

1I12 1F3

G–W

G–W

1

2

1

2

1 BK1

BLLeft quarterpanel LH

5

1 3 3

2 1

BM

2

2

120A ALT

A A

1

11 9 2 1

2

1

1

3 48 7

GND T– ST– HS–

L–RW

W R–L

W–B

W–B

T+ ILIG ST+

B–LW

G–B

V–G

R–L

G–R

W–B

W–B

W–B

W–B

G

G–W

G–W

G–Y

G G–W

G–Y

G–W

W–B

W–B

G–R

L–R

G–R G–W

L 3LIGHT FAILURE SENSOR

F 4FR

ON

T PAR

KING

LIGH

T RH

F 3FR

ON

T PAR

KIN

G LIG

HT LH L 2

LICEN

SE PLA

TELIG

HT R

H

L 1LIC

ENSE

PLATE

LIGH

T LH

N 3

NO

ISE FILTER(S

top Light )

Power Source Taillight and Stop Light (W /G )

G–B

40A AM1

To Skid Control

ECU

<16–8>

<17–5>

15A STO

P

10A GA

UG

E

BATTER

Y

A

V–G

S 8STOP LIGHT SW

STOP

I12IGNITION SW

1I9

G–B

REAR

LIGH

TSW

ARN

ING

LIGH

T[C

OM

B. M

ETER

] BA

C 9

C10

,

To Theft Deterrent

EC

U<

11–4>R

–W

2B6

2

1

G

F 6FR

ON

T SIDE

MAR

KER

LIGH

T RH2

1

W–B

F 5FR

ON

T SIDE

MAR

KER

LIGH

T LHW

–B

2B5

2B3

W–B

W–B

F

FF

TAIL

R 5

REAR

CO

MB

INATIO

NLIG

HT LH

R 7

REAR

CO

MB

INATIO

NLIG

HT R

H

1

G

R 8

REAR

CO

MB

INATIO

NLIG

HT R

H

3

2 4

G–R

STOP

TAIL

R 6

REAR

CO

MB

INATIO

NLIG

HT LH

3

2 4G

W–B

STOP

TAIL


W–B

W–B

G–B

G–B

W–B W–B

E

AC

A

E

AC

C

C

EE

J17JUNCTION CONNECTOR


GGG

G

G–R

G–W

G–R

G

A

G–R

1I6

STOP

TAIL

5

C

C C

A

AA

G

BK12

G

BJ22

J18JU

NC

TION

CO

NN

ECTO

R


G–WBJ23

G–RBK1

3

G

W–B

BJ12

BK22

W–B

W–BW–B

4 BJ2

G–W

2

1

W–B

H19

HIG

H M

OU

NTED

STO

P LIGH

T

G–Y

Left side of theback panel Upper

G–B

1 BJ2

F


G–B

B

B

BNRight side of theback panel lower

W–B

W–B

G–B

B

J18JU

NC

TION

CO

NN

ECTO

RW

–B

W–B

W–B W–B

R16

RE

AR SID

E MA

RKE

R LIG

HT

LH RH

2

1

J13JU

NC

TION

CO

NN

ECTO

R



12

34

27

IS 3

00

2

ACC

IG1

AM1

4

I12

IGN

ITIO

N S

W

1D2

40A

AM

1

2 1 1O1

W

1

120A

ALT

1

1 2

B–L

BAT

TER

Y

1D1

15AWASHER

1G4

L–R

L L

IB35

LBJ

29L

BK14

L

3A

1A

2A

1B

R21

R22

,

RE

AR W

IPER

MO

TOR

AB

+B LSC

1–

32 M

WAS

H

OFF

WAS

H

EWC

IR+1

R

1013

212W

R

INT

ON

C13

RE

AR W

IPER

AN

D W

ASH

ER

SW

[CO

MB.

SW

]

IB31 IB32

L–R

BJ28

L–R

BK19

LBJ

27L

BK18

L–W

10IA

3

L–W

L–R L

BNR

ight

sid

e of

the

back

pan

el lo

wer

L–R

L

W–B

IDC

owl s

ide

pane

l LH

AA

J 5

JUN

CTI

ON

CO

NN

EC

TOR

ECLe

ft fe

nder

apr

on

W–B

W–B

1F9

1G5

W–B

W

W 1

WAS

HER

MO

TOR

Po

we

r S

ou

rce

Re

ar

Wip

er

an

d W

as

he

r

25AWIPER

1F6

L

2002 LEX

US

IS 300 (E

WD

451U)

M

1 2 3 43 421

28 IS 300

1

120AALT

20ARADIONO. 1

1 1

1

1D2

1 1O

6 1D

2

ACC

IG1AM1

3


10ARADIONO. 2

1A9

16 A7 A 2 A 9 A

1 II1 9 II1

1 A 8 A

1 ID2 5 ID2

6 A B5

1 IH4

A11

13 IH1 9 IH42 IH1

Power Source Radio and P layer (W /G )

A

A

W

E

FR+ FR–FL+ FL–

WR+ NAVI–MUTEWL–

B–LW L–Y

GR

GR

L–Y

LG L

LG L

R W

P

V

P V

Y B

R–W

R–W

R–L

Y–R

W–L

L Y–R

S 6 S 7,

STEREO COMPONENT AMPLIFIER

A B

ACC+BU+B

AMP+ MTR WF–

2

I12IGNITION SW

BATTERY

1

12

2

4 A 15 A 2 B 11 B

8 IH4 7 IH4

B–W

W–L

Y–B

Y–R

B–W

W–L

8 B 9 B 17 B 18 B 15 B 1 B 10 B 7 B14 B

1

B

W G R B

WL+

Y

WR–

R–Y

CTX+

R–W

CTX–

L

GND(E)

ANT+B

L+ R+ L– R– S–GND TX+ TX– MUTE

B A26ANTENNAAMPLIFIER

L+ R+ L– R– GND(S) TX+ TX– MUTE

T13TW

EETER

RH

T12TW

EETER

LH

F14FRONT DOOR SPEAKER RH

F13FRONT DOOR SPEAKER LH

1 21 2

3 43 4

11 22

2B12

2G9 2F5

BU+B ACC+B

A

L–Y

GR

GR

R

12 A

GND(E)

GND

IF Front floor panelcenter RH

BR

BR

BR

L–Y

L–Y

R

(Shielded )

AMP+

1 11 9 8 19 18 16 5 15 7 3

2013 R 2RADIO AND PLAYER

3 6 5

BK Front floorpanel RH

W–B

142

WF+ WF– WF+L

L

W–L

From N

avigation ECU

<25–1>

From M

ulti–Display

<25–2>

8

+B

L–Y

7

3 IH4

L–Y

BR

W 5WOOFER

L–Y

(*2 )

(*2 )

G–B

(*1 )

G(*1 )To N

avigationEC

U<

25–2>

P(*1)

V(*1)

From N

avigationEC

U<

25–3>

3 A 10 A

RL+ RL–

B Y

3 IB3 9 IB3

B Y

1

R17REAR SPEAKER LH

2

5 A 14 A

RR+ RR–

R W

10 IH4 11 IH4

R W

1

R18REAR SPEAKER RH

2

* 2 : w/o LEXUS Navigation System* 1 : w/ LEXUS Navigation System

40AAM1

B Y R W

A B A B

A B A B

S20SQUAWKER LH

S21SQUAWKER RH

1 13 3

A AB B

B Y R W

XX



Documents

1 IS 300 ELECTRICAL WIRING DIAGRAM - 2JZGARAGE · PDF file1 is 300 electrical wiring diagram 1 p 1 1 1 1 2 1d 1 1o 2 acc ig1 ig2 st2 ... 51 32 mpx2 20 ia3 1 2 i 2 ignition ... m overall