Lexus ES300 (2002 year). Manual — part 288

F41977

Skid Control ECU
with Actuator

2L

51

TC

16

S1

P-B

18

D3

DLC3

TC

CG

60

50

2G

Passenger Side J/B

SB

II

W

3

4

13

P-B

3B

3B

3B

3B

41

Driver Side J/B

2L

2R

18

3

W-B

W-B

C52361

Tc

CG

DLC3

05-280

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

433

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

TC TERMINAL CIRCUIT

CIRCUIT DESCRIPTION

Connecting terminals Tc and CG of the DLC3 causes the ECU to display the DTC by flashing the ABS warn-
ing light.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

INSPECT DLC3

(a)

Turn the ignition switch ON.

(b)

Measure voltage between terminals Tc and CG of DLC3.
OK: : 10 - 14 V

NG

Go to step 3

OK

055XY-02

C52361

Tc

CG

DLC3

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

05-281

434

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2

CHECK HARNESS AND CONNECTOR(DLC3 - SKID CONTROL ECU, DLC3 -
BODY GROUND)(See page

01-31

)

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE BRAKE ACTUATOR ASSY

3

CHECK ABS WARNING LIGHT

SST

09843-18040

(a)

Using SST, connect the terminals Tc and CG of the DLC3.

(b)

Check the ABS warning light.
OK: ABS warning light blinks

OK

END

NG

CHECK AND REPLACE BRAKE ACTUATOR ASSY

F42001

60

TS

SG

50

Passenger Side J/B

4

14

3B

3B

Driver Side J/B

LG-B

SB

2L

8

2R

8

W-B

Skid Control ECU
with Actuator

TS

15

S1

7

LG-B

IF3

D3 DLC3

IA

C52361

Ts

CG

DLC3

05-282

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

435

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

TS TERMINAL CIRCUIT

CIRCUIT DESCRIPTION

The sensor check circuit detects the abnormalities in the speed sensor signal which cannot be detected by
the DTC check.
Connecting terminals Ts and CG of the DLC3 starts the check.

WIRING DIAGRAM
.

INSPECTION PROCEDURE

1

INSPECT DLC3

(a)

Turn the ignition switch ON.

(b)

Measure voltage between terminals Ts and CG of DLC3.
OK: 10 - 14 V

NG

Go to step 3

OK

2

CHECK HARNESS AND CONNECTOR(DLC3 - SKID CONTROL ECU, DLC3 -
BODY GROUND)(See page

01-31

)

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE BRAKE ACTUATOR ASSY

055XZ-02

C52361

Ts

CG

DLC3

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

05-283

436

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

3

CHECK ABS WARNING LIGHT

SST

09843-18040

(a)

Using SST, connect the terminals Ts and CG of the DLC3.

(b)

Check the ABS warning light.
OK: ABS warning light blinks

OK

END

NG

CHECK AND REPLACE BRAKE ACTUATOR ASSY