Lexus ES300 (1997 year). Service manual - part 359

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–213

365

1997 LEXUS ES300   (RM511U)

NG

Repair or replace harness or connector.

OK

Check and replace absorber control ECU.

W03886

NEO

TACH

B–O

Connector

Junction

ECM

Absorber Control ECU

B–O

D

F

J29

A24

14

13

E7

J28

W03874

AB0119

F00255

(+)

NEO

ON

(–)

DI–214

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

366

1997 LEXUS ES300   (RM511U)

DTC

41

Crankshaft Position Sensor Circuit

CIRCUIT DESCRIPTION

DTC No.

DTC Detecting Condition

Trouble Area

41

Engine speed 2,000 rpm or higher signal does not input.

Open or short circuit in between absorber control ECU and

ECM

ECM

Absorber control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1

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

PREPARATION:
(a)

Remove the No.1 lower panel (See page 

BO–82

).

(b)

Start the engine, run it at idle.

CHECK:
Measure voltage between terminal NEO of absorber control
ECU connector and body ground.
OK:
Voltage: 1 – 8 V

OK

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

DI–203

).

NG

DI0AM–01

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

DI–215

367

1997 LEXUS ES300   (RM511U)

2

Check crankshaft position sensor (See page 

DI–66

).

OK

Go to step 4.

NG

3

Check harness and connectors between absorber control ECU and ECM
(See page 

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace absorber control ECU.

4

Does malfunction disappear when a known good absorber control ECU is
installed?

YES

Check and replace absorber control ECU.

NO

Check and replace ECM.

W03892

Absorber Control ECU

Instrument Panel J/B

Junction

STP

J27

Stop Light Switch

Battery

26

Connector

W

2

1

G–W

A

A

G–W

G–W

1R

1R

4

5

A24

DI–216

–

DIAGNOSTICS

ELECTRIC MODULATED SUSPENSION

368

1997 LEXUS ES300   (RM511U)

DTC

42

Stop Light Switch Circuit

CIRCUIT DESCRIPTION

DTC No.

DTC Detecting Condition

Trouble Area

42

Stop light switch signal does not change.

Stop light switch

Open or short circuit in between absorber control ECU and

stop light switch

Error in other system that uses the same stop light switch

Absorber control ECU

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check operation of stop light.

CHECK:
Check that stop light comes on when brake pedal is depressed and goes off when brake pedal is released.

NG

Check stop light circuit (See page 

BE–51

).

OK

DI0AN–01