Lexus ES300 (1997 year). Service manual - part 356

DI0AF–01

W04370

Rear Absorber Control Actuators

Absorber Control Switch

Steering Sensor

Rear Speed Sensor Rotor

Rear Speed Sensor

Absorber Control ECU

(Acceleration Sensor is a built–in equipment)

Stop Light Switch

Front Absorber Control Actuators

DLC1

DLC2

ECM

Crankshaft Position Sensor

Front Speed
Sensor Ro-
tor

ABS ECU or ABS & TRAC ECU

Front Speed Sensor

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–201

353

1997 LEXUS ES300   (RM511U)

PARTS LOCATION

DI0AG–01

W03883

A24

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

DI–202

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

354

1997 LEXUS ES300   (RM511U)

TERMINALS OF ECM

Symbols (Terminals No.)

STD Voltage (V)

Condition

GND (A24 – 1) – Body ground

Continuity

Always

+B (A24 – 2) – Body ground

10 – 14

IG switch ON

SW2 (A24

3)

B d

d

8 V or more

IG switch ON, Absorber control switch 1

SW2 (A24 – 3) – Body ground

Below 1.5

IG switch ON, Absorber control switch 2

TEM (A24 – 4) – Body ground

10 – 14

Connect between terminals TEM and E1 of DLC2 for 2 sec. after the

ignition

RB– (A24 – 5) – Body ground

RB+ (A24 – 6) – Body ground

RA– (A24 – 7) – Body ground

RA+ (A24 – 8) – Body ground

FB– (A24 – 10) – Body ground

FB+ (A24 – 11) – Body ground

FA– (A24 – 12) – Body ground

FA+ (A24 – 13) – Body ground

Continuity

Always

NEO (A24 – 14) – Body ground

1 – 8

Start the engine, run it at idle

SS1 (A24 – 16) – Body ground

1

3 5

IG

it h ON St

i

h

l i b i

t

d l

l

SS2 (A24 – 17) – Body ground

1 – 3.5

IG switch ON, Steering wheel is being turned slowly

RRO (A24 – 18) – Body ground

1.5 – 8

While driving

T (A24

19)

B d

d

Below 1.5

IG switch ON, Connect between terminals Ts and E1 of DLC1

Ts (A24 – 19) – Body ground

10 – 14

IG switch ON, Disconnect terminals Ts and E1 of DLC1

FRO (A24 – 20) – Body ground

1.5 – 8

While driving

SW1 (A24

21)

B d

d

Below 1.5

IG switch ON, Absorber control switch 3

SW1 (A24 – 21) – Body ground

8 V or more

IG switch ON, Absorber control switch 4

T (A24

22)

B d

d

Below 1.5

IG switch ON, Connect between terminals Tc and E1 of DLC1

Tc (A24 – 22) – Body ground

10 – 14

IG switch ON, Disconnect terminals Tc and E1 of DLC1

STP (A24

26)

B d

d

10 – 14

IG switch ON, Brake pedal is released

STP (A24 – 26) – Body ground

Below 1.5

IG switch ON, Brake pedal is depressed

DI0AH–01

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–203

355

1997 LEXUS ES300   (RM511U)

PROBLEM SYMPTOMS TABLE

If a normal code is displayed during the DTC check but the problem still occurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the relevant troubleshooting page.

Symptom

Inspection Circuit

See page

Damping force control do not operate at all

1. Absorber control actuator circuit

2. TEM terminal circuit

3. Tc terminal circuit

4. Ts terminal circuit

5. Shock absorber

6. Absorber control ECU

DI–204

DI–224

DI–226

DI–228

SA–24

SA–50

–

Only anti–roll control does not operate

1. Steering sensor circuit

2. Speed sensor circuit

3. Absorber control ECU

DI–211

DI–209

–

Only anti–squat control does not operate

1. Crankshaft position sensor circuit

2. Speed sensor circuit

3. Absorber control ECU

DI–214

DI–209

–

Only anti–dive control does not operate

1. Stop light switch circuit

2. Speed sensor circuit

3. Absorber control ECU

DI–216

DI–209

–

Only semi–active control does not operate

1. Speed sensor circuit

2. Absorber control ECU

(Deceleration sensor is a built–in equipment)

DI–209

–

Only speed sensing control does not operate

1. Speed sensor circuit

2. Absorber control ECU

DI–209

–

Only unsprung damping control does not operate

1. Speed sensor circuit

2. Absorber control ECU

DI–209

–

DI0AI–01

W03885

12

Absorber Control

Left Front

Connector

Instrument Panel J/B

Right Rear

13

Absorber Control ECU

Junction

J3

Connector

Junction

Absorber Control

Right Front
Absorber Control

Junction

A11

Connector

A12

A36

Left Rear
Absorber Control

A24

A35

J37

Junction

J15

Connector

Junction
Connector

J27

A24

A24

A24

A24

A24

A24

A24

A12

A12

A12

A35

A35

A35

A35

A12

A36

A36

A36

A36

A11

A11

A11

A11

J9

J8

1J

11

L–Y

1J

10

L–Y

L–Y

L–Y

L

L–B

R–Y

L–W

8

IM3

R

IM3

IM3

IM3

ID1

ID1

ID1

ID1

IN1

IN1

IN1

IN1

7

EA

II

BN

IM

BO

L

L

L

L–B

L–W

L–B

L–B

L–W

L–W

R

R

R–Y

R–Y

R–W

L–R

W–B

R–W

R–W

L–R

L–R

R

R

R–Y

R–Y

R–W

R–W

L–R

L–R

W–B

W–B

W–B

W–B

W–B

W–B

W–B

W–B

A

2

A

1

1

1

6

5

5

A

A

A

A

W–B

C

C

C

4

4

4

2

2

10

6

3

8

7

5

1

4

4

3

5
2

1

3

2

2

5

3

5

7

6

8

D

D

E

F

B

E

F

B

B

F

E

D

Junction

Connector

J27

2
3

C

F

F

F

E

C

E

E

C

FA+

FB–

FB+

FA–

RA+

RB–

RB+

RA–

DI–204

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

356

1997 LEXUS ES300   (RM511U)

CIRCUIT INSPECTION

DTC

21, 23

Absorber Control Actuator Circuit

CIRCUIT DESCRIPTION

DTC No.*

DTC Detecting Condition

Trouble Area

21

23

When the absorber control actuator is activated, over current

flows through the front or rear driving circuit.

Left  front, right front, left rear and right rear absorber control

actuator

Short circuit in between absorber control actuator and ab-

sorber control ECU

Absorber control ECU

*: Code 21 corresponds to the left front and right front absorber control actuator circuit.
   Code 23 corresponds to the left rear and right rear absorber control actuator circuit.

WIRING DIAGRAM