Lexus ES300 (2002 year). Manual - part 353

F41648

Absorber Control ECU

Left Front Absorber
Control Actuator

A8

L-Y

L-W

L

L-B

FAL+

FAL-

FBL+

FBL-

A21

3

1

2

7

4

5

W-B

ED

A21

A21

A21

2

3

1

A21

A21

A21

A21

4

5

L-Y

L-W

L

L-B

4

5

2

3

Right Front Absorber
Control Actuator

A9

W-B

EB

1

12

6

FAR+

FAR-

FBR+

FBR-

Left Rear Absorber
Control Actuator

A38

4

5

W-B

2

3

1

L-R

R-W

R-Y

R

L-R

R-W

R-Y

R

5

6

15

16

ID1

ID1

ID1

ID1

A22

A22

A22

A22

10

8

9

7

W-B

RAL+

RAL-

RBL+

RBL-

A

A

BC

BA

J12 
J/C

Right Rear Absorber
Control Actuator

A39

4

5

W-B

2

3

1

W-B

A

A

BD

BB

J13 
J/C

L-R

R-W

R-Y

R

10

12

11

13

L-R

R-W

R-Y

R

L-R

R-W

R-Y

R

A22

A22

A22

A22

26

12

13

11

9

11

10

12

IF2

IO5

IF2

IF2

IF2

IO5

IO5

IO5

RAR+

RAR-

RBR+

RBR-

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

05-21 1

364

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

WIRING DIAGRAM

C52361

Ts

CG

DLC3:

05-212

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

365

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

INSPECTION PROCEDURE

1

INSPECT ABSORBER CONTROL ACTUATOR OPERATION

In case of using hand-held tester:
(a)

Connect the hand-held tester to the DLC3.

(b)

Turn the ignition switch to ON and turn the hand-held tester main switch to ON.

(c)

Select the item ”DAMPER STEP FR (FL, RR, RL)” in the ACTIVE TEST and operate the absorber con-
trol actuator on the hand-held tester.

(d)

Check whether or not the absorber control actuator operates to harden or soften the suspension with
the hand-held tester.
OK: 
The absorber control actuator operates to harden or soften the suspension.

In case of not using hand-held tester:
(a)

Using SST, connect terminals Ts and CG of the DLC3 with
the ignition switch to OFF (TEST mode).
SST

09843-18040

(b)

Start the engine.
(1)

Under this condition, the absorber control actuator
position becomes 1 (Soft).

(c)

Starting from the above mentioned position, as the brake
pedal is depressed, the absorber control actuator position
increase (1 

→

2 

→

 3 

→

 ... 15 

→

 16).

At this time, bounce the vehicle and check that the shock
absorber is becoming harder.
OK: 
The absorber control actuator operates.

NG

Go to step 2

OK

CHECK AND REPLACE ABSORBER CONTROL ECU(See page 

01-31

)

C91056

Front:

C91056

Rear:

-

DIAGNOSTICS

ELECTRONIC MODULATED SUSPENSION SYSTEM

05-213

366

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

2

INSPECT ABSORBER CONTROL ACTUATOR

Front absorber control actuator:
(a)

Disconnect the absorber control actuator connector.

(b)

Measure the resistance between each terminal of the
front absorber control actuator.
OK:

Terminal

Resistance

A8 or A9 - 1 and A8 or A9 - 2

13.4 - 15.0 

Ω

A8 or A9 - 1 and A8 or A9 - 3

13.4 - 15.0 

Ω

A8 or A9 - 1 and A8 or A9 - 4

13.4 - 15.0 

Ω

A8 or A9 - 1 and A8 or A9 - 5

13.4 - 15.0 

Ω

Rear absorber control actuator:
(a)

Disconnect the absorber control actuator connector.

(b)

Measure the resistance between each terminal of the
front absorber control actuator.
OK:

Terminal

Resistance

A42 or A43 - 1 and A42 or A43 - 2

13.4 - 15.0 

Ω

A42 or A43 - 1 and A42 or A43 - 3

13.4 - 15.0 

Ω

A42 or A43 - 1 and A42 or A43 - 4

13.4 - 15.0 

Ω

A42 or A43 - 1 and A42 or A43 - 5

13.4 - 15.0 

Ω

NG

REPLACE SHOCK ABSORBER ASSY FRONT
RH

NG

REPLACE SHOCK ABSORBER ASSY FRONT
LH

NG

REPLACE SHOCK ABSORBER ASSY REAR RH

NG

REPLACE SHOCK ABSORBER ASSY REAR LH

OK

3

CHECK HARNESS AND CONNECTOR(ABSORBER CONTROL ACTUATOR  -
ABSORBER CONTROLL ECU)

(a)

Check for open and short circuit in harness and connector between each absorber control actuator
and absorber control ECU (See page 

01-31

).

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE ABSORBER CONTROL ECU(See page 

01-31

)

051LP-07

-

DIAGNOSTICS

SFI SYSTEM (1MZ-FE)

05-1

154

2002 LEXUS ES300 REPAIR MANUAL   (RM911U)

SFI SYSTEM (1MZ-FE)

HOW TO PROCEED WITH TROUBLESHOOTING

1

VEHICLE BROUGHT TO WORKSHOP

2

CUSTOMER PROBLEM ANALYSIS (See page 

05-4

)

3

CONNECT THE HAND-HELD TESTER TO DLC3

HINT:
If the display indicates a communication fault in the tool, inspect DLC3.

4

CHECK DTC AND FREEZED FRAME DATA

 

(See page 

05-5

)

HINT:
Record or print DTC and Freezed Frame Data, if needed.

5

CLEAR DTC AND FREEZED FRAME DATA (See page 

05-5

)

6

VISUAL INSPECTION

7

SETTING THE CHECK (TEST) MODE DIAGNOSIS (See page 

05-5

)

8

PROBLEM SYMPTOM CONFIRMATION

HINT:
If the engine does not start, perform step 10 and 12 first.

A

Malfunction does not occur

B

Malfunction occurs

B

GO TO STEP 10

A