Lexus ES300 (2002 year). Service manual - part 21

184

Cruise Control

  :  Parts Location

Code

See Page

Code

See Page

Code

See Page

A4

36

E6

A

38

S7

C

39

A25

38

E7

B

38

S13

39

C7

38

E8

C

38

T2

37

C10

38

E9

D

38

T3

37

D2

38

E10

E

38

T8

39

E1

A

36

J11

39

E2

B

36

S6

B

39

: Junction Block and Wire Harness Connector

Code

See Page

Junction Block and Wire Harness (Connector Location)

1B

1C

25

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

1H

g

g

(

g

)

1K

25

Engine Wire and Engine Room J/B (Engine Compartment Left)

2B

28

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

2G

28

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

2M

2O

29

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

2P

(

)

3A

34 (w/ VSC)

3A

35 (w/o VSC)

Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)

3B

34 (w/ VSC)

Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)

3B

35 (w/o VSC)

: Connector Joining Wire Harness and Wire Harness

Code

See Page

Joining Wire Harness and Wire Harness (Connector Location)

IF4

46

Engine Room Main Wire and Instrument Panel Wire (Right Side of Steering Column Tube)

IF5

46

Engine Room Main Wire and Instrument Panel Wire (Right Side of Steering Column Tube)

IK1

48

Instrument Panel Wire and Instrument Panel Wire (Instrument Panel Reinforcement RH)

IL1

48

Engine Wire and Instrument Panel Wire (Behind the Glove Box)

IL2

48

Engine Wire and Instrument Panel Wire (Behind the Glove Box)

: Ground Points

Code

See Page

Ground Points Location

ED

44

Left Fender

EE

44

Left Side of Cylinder Head

EF

44

Intake Side of Cylinder Block

ID

46

Instrument Panel Brace RH

: Splice Points

Code

See Page

Wire Harness with Splice Points

Code

See Page

Wire Harness with Splice Points

I2

48

Engine Room Main Wire

I6

48

Engine Wire

185

SRS

NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started after 90 seconds from when the ignition switch is turned to the ”LOCK” position and the
negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may be deployed.)

When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. This vehicle has power tilt and power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of the memory contents. So when the work is finished, it will be necessary
to explain this fact tot the customer, and ask the customer to adjust the features and reset the memory. To avoid erasing
the memory in each memory system, never use a back–up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain shield airbag
assembly, seat belt pretensioner, airbag sensor assembly or side airbag sensor assembly directly to hot air or flames.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, curtain shield airbag assembly, seat belt pretensioner, airbag sensor assembly and
side airbag sensor assembly should be inspected.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain
shield airbag assembly, seat belt pretensioner, airbag sensor assembly or side airbag sensor assembly in order to reuse
it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain shield airbag assembly, seat
belt pretensioner, airbag sensor assembly or side airbag sensor assembly has been dropped, or if there are cracks,
dents or other defects in the case, bracket or connector, replace them with new ones.

Use a volt/ohmmeter with high impedance (10 k

Ω

/V minimum) for troubleshooting the system’s electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.

After work on the SRS is completed, perform the SRS warning light check.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.

186

SRS

B

6

B

5

B

4

B

12

B

19

B

27

B

13

B

14

B

16

B

17

B

10

B

11

B

8

B

7

B

15

B

26

B

9

B

20

C

10

C

9

A

7

A

8

IF1

1

IF1

3

IF1

2

IF1

4

2D

7

2D

5

2D

2

2L

3

2L

4

3B

3B

41

61

(*1)
(*2)

3B

3B

42

62

(*1)
(*2)

3B

3B

51

71

3B

3B

52

72

2R

8

2D

3

IA

10A
ECU–IG

From Power Source System (See Page 56)

2D

10

2D

9

2G

8

10A
IG2

1C

7

B–

R

B–

O

B–

O

B–

O

B–

R

L

W

P–

B

W

W

W

P–

B

Y–

B

Y

Y–

B

Y

W–

B

W–

B

Y

Y–

B

Y–

V

Y–

O

Y–

R

Y–

G

Y–

G

R

Y–

P

W–

R

BR

W–

R

BR

B–

W

BR

–

W

B–

W

BR

–

W

E1

IG1

D+

D2+

D2–

P+

P–

P2+

P2–

+SL

–SL

+SR

–SR

D–

IG2

GSW

SIL

TC

PL+

PL–

PR+

PR–

SIL

TC

GSW

Airbag Squib
(Steering Wheel Pad)

A35

Airbag Squib
(Front Passenger
 Airbag Assembly
 No. 1)

A33

Airbag Squib
(Front Passenger
 Airbag Assembly
 No. 2)

A34

Airbag Sensor
Front LH

A12

Airbag Sensor
Front RH

A13

Body ECU

Data Link Connector 3

D 2

Pretensioner LH

P11

Pretensioner RH

P12

Airbag Sensor Assembly

A30(A), A31(B), A32(C)

7

21

13

1

2

1

2

2

1

4

3

1

2

1

2

2

1

2

1

D–

D+

D2+

D2–

P+

P–

P2+

P2–

187

ID

B

28

A

15

A

5

A

14

A

13

A

9

A

10

C

18

C

12

C

19

C

20

C

8

C

7

C

17

C

15

A

12

A

11

P–

G

GR

–

R

LG

–B

GR

–

L

V

O

P

GR

Y–

R

Y–

G

BR

BR

L–

R

P

BR

G–

W

V

O

E2

CSL+

CSL–

VUCL

ESCL

ICL+

ICL–

CSR+

CSR–

VUCR

ESCR

VUPR

ESR

CSR+

CSR–

VUCR

ESCR

ICR+

ICR–

VUPR

ESR

SFL+

SFL–

CSL+

CSL–

VUCL

ESCL

Curtain Shielded
Airbag Sensor LH

C14

Curtain Shield
Airbag Squib LH

C16

Curtain Shielded
Airbag Sensor RH

C15

Curtain Shield
Airbag Squib RH

C17

Side Airbag
Squib RH

S17

Side Airbag
Squib LH

S22

Airbag Sensor Assembly

A30(A), A31(B), A32(C)

3

2

4

1

1

2

3

2

4

1

1

2

2

1

1

2

*  1 : w/ VSC
*  2 : w/o VSC

A

16

A

18

C

5

C

6

P–

L

GR

–

L

Y–

R

Y–

G

VUPL

ESL

VUPL

ESL

SFR+

SFR–

Side Airbag
Sensor LH

S16

Side Airbag
Squib RH

S23

2

1

1

2

Buckle SW LH

B 7

1

2

5

4

BA

A

2

L–

B

LSP+

A

1

GR

–

B

LSP–

A

19

LG

–B

LBE+

W–

B

B

2

G–

Y

PBEW

B

3

B–

Y

LA

C

14

G–

Y

RBE+

B–Y

G–Y

G–Y

Y

L

B–

G

B

S

eat

 P

o

s

it

ion

A

ir

bag S

ens

or