Lexus ES300 (1997 year). Service manual - part 372

F00113

A22

ED

BR

Tc

9

LG–R

A

A

A

BR

IK3

6

BR

3

11

DLC1

Tc

E

1

Tc

E

1

LG–R

LG–R

IK3

11

BR

C

B

J/C

BR

DLC2

3

4

LG–R

B

B

B

J8

ABS ECU

J8

J9

J/C

J/C

J24

A22

ED

BR

Tc

9

LG–R

A

A

A

BR

IK3

6

BR

3

11

DLC1

Tc

E

1

Tc

E

1

LG–R

LG–R

IK3

11

BR

C

B

J/C

BR

DLC2

3

4

LG–R

B

B

B

J8

ABS ECU

J8

J9

J/C

J/C

J24

S−17−1 Iei−23−1−A

F00041

DLC1

DLC2

Tc

E

1

E

1

Tc

DLC1

DLC2

Tc

E

1

E

1

Tc

DLC1

DLC2

Tc

E

1

E

1

Tc

DLC1

DLC2

Tc

E

1

E

1

Tc

DLC1

DLC2

Tc

E

1

E

1

Tc

DLC1

DLC2

Tc

E

1

E

1

Tc

–

DIAGNOSTICS

ANTI–LOCK BRAKE SYSTEM

DI–265

417

1997 LEXUS ES300   (RM511U)

Tc Terminal Circuit

CIRCUIT DESCRIPTION

Connecting between terminals Tc and E

1

 of the DLC1 or the DLC2 causes the ECU to display the DTC by

flashing the ABS warning light.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check voltage between terminals Tc and E

1

 of DLC2 or DLC1.

CHECK:
(a)

Turn the ignition switch ON.

(b)

Measure voltage between terminals Tc and E

1

 of DLC2 or

DLC1.

OK:

Voltage: 10 – 14 V

OK

If ABS warning light does not blink even after Tc
and E

1

 are connected, the ECU may be defec-

tive.

NG

DI0BS–01

DI–266

–

DIAGNOSTICS

ANTI–LOCK BRAKE SYSTEM

418

1997 LEXUS ES300   (RM511U)

2

Check for open and short in harness and connector between ABS ECU and
DLC2 or DLC1, DLC2 or DLC1 and body ground (See page 

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.

F00117

J/C

ED

BR

A

A

BR

3

16

DLC1

Ts

E

1

R–Y

R–Y

A22

8

Ts

ABS ECU

J24

IK3

8

J/C

J30

F

F

R–Y

J/C

ED

BR

A

A

BR

3

16

DLC1

Ts

E

1

R–Y

R–Y

A22

8

Ts

ABS ECU

J24

IK3

8

J/C

J30

F

F

R–Y

F00007

Ts

DLC1

E

1

Ts

DLC1

E

1

Ts

DLC1

E

1

Ts

DLC1

E

1

Ts

DLC1

E

1

Ts

DLC1

E

1

–

DIAGNOSTICS

ANTI–LOCK BRAKE SYSTEM

DI–267

419

1997 LEXUS ES300   (RM511U)

Ts Terminal Circuit

CIRCUIT DESCRIPTION

The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected with
the DTC check.
Connecting terminals Ts and E

1

 of the DLC1 in the engine compartment starts the check.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check voltage between terminals Ts and E

1

 of DLC1.

CHECK:
(a)

Turn the ignition switch ON.

(b)

Measure voltage between terminals Ts and E

1

 of DLC1.

OK:

Voltage: 10 – 14 V

OK

If ABS warning light does not blink even after Ts
and E

1

 are connected, the ECU may be defec-

tive.

NG

DI0BT–01

DI–268

–

DIAGNOSTICS

ANTI–LOCK BRAKE SYSTEM

420

1997 LEXUS ES300   (RM511U)

2

Check for open and short in harness and connector between ABS ECU and
DLC1, DLC1 and body ground (See page 

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace ABS ECU.