Lexus ES300 (1997 year). Manual - part 361

W03887

Instrument Panel J/B

Absorber Control ECU

Switch

Junction
Connector

Ignition

Battery

FL BLOCK

J3

A24

1

2

+B

1

GND

2

FL MAIN

A24

1B

II

Junction
Connector

J15

1K

F11

F6

F11

AM1

W–B

B–R

W–B

B–R

ECU–IG

A

B–R

B–Y

W

1

2

1K

1J

1

2

1

2

Instrument Panel J/B

B–R

B–R

1

B–G

B–G

A

A

A

2

1

2

4

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–221

373

1997 LEXUS ES300   (RM511U)

Power Source Circuit

CIRCUIT DESCRIPTION

This is the power source for the absorber control ECU, hence the absorber control actuator.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check battery positive voltage.

OK:
Voltage: 10 – 14 V

NG

Charge or replace battery.

OK

DI0AP–01

W03878

AB0119

F00258

+B

(+)

(–)

ON

W03879

(+)

GND

(–)

DI–222

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

374

1997 LEXUS ES300   (RM511U)

2

Check voltage between terminal +B of absorber control ECU connector and body
ground.

PREPARATION:
(a)

Remove the No.1 lower panel (See page 

BO–82

).

(b)

Turn the ignition switch ON.

CHECK:
Measure voltage between terminal +B of absorber control ECU
and body ground.
OK:
Voltage: 10 – 14 V

 

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page 

DI–203

).

NG

3

Check continuity between terminal GND of absorber control ECU connector and
body ground.

CHECK:
Measure continuity between terminal GND of absorber control
ECU connector and body ground.
OK:
Continuity

 

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page 

DI–203

).

NG

N20675

ECU–IG

Instrument Panel J/B

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–223

375

1997 LEXUS ES300   (RM511U)

4

Check ECU–IG fuse.

PREPARATION:
Remove ECU–IG fuse from instrument panel J/B.
CHECK:
Check continuity of ECU–IG fuse.
OK:
Continuity

 

NG

Check for short in all the harness and compo-
nents connected to ECU–IG fuse (See attached
wiring diagram).

OK

Check for open in harness and connector between absorber control ECU and battery 
(See page 

IN–27

).

W03894

Absorber Control ECU

Junction

P

TEM

BR

Connector

J24

IK3

E1

A24

BR

BR

Junction
Connector

BR

B

C

A

A

TEM

J9

J8

DLC2

4

6

15

3

ED

F00288

E1

ON

TEM

DLC2

DI–224

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

376

1997 LEXUS ES300   (RM511U)

TEM Terminal Circuit

CIRCUIT DESCRIPTION

By connecting LED to the between terminals TEM and E1 of DLC2, a TEM output check can be performed
(See page 

DI–196

).

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check voltage between terminals TEM and E1 of DLC2.

CHECK:
Measure the voltage between terminals TEM and E1 of DLC2
for 2 sec. after the ignition switch is ON.
OK:
Voltage: 10 – 14 V

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page 

DI–203

).

NG

DI0AQ–01