Lexus ES300 (1997 year). Manual — part 384

F00120

DLC2

ED

IK3

A

DLC1

6

12

Tc

B

J1

J24

J/C

LG–R

IK3

A19

IM2

J9

11

J8

E

1

C

BR

A

A

BR

BR

BR

J/C

BR

Tc

Tc

E

1

LG–R

J/C

B

B

B

LG–R

LG–R

LG–R

ABS & TRAC ECU

9

3

4

11

3

DLC2

ED

IK3

A

DLC1

6

12

Tc

B

J1

J24

J/C

LG–R

IK3

A19

IM2

J9

11

J8

E

1

C

BR

A

A

BR

BR

BR

J/C

BR

Tc

Tc

E

1

LG–R

J/C

B

B

B

LG–R

LG–R

LG–R

ABS & TRAC ECU

9

3

4

11

3

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

ABS & TRACTION CONTROL SYSTEM

DI–313

465

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

blinking the ABS warning light and TRAC OFF indicator 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

DI0CK–01

DI–314

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

466

1997 LEXUS ES300 (RM511U)

2

Check for open and short in harness and connector between ABS & TRAC 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 & TRAC ECU.

F00119

R–Y

3

DLC1

J/C

E

1

A

Ts

16

J24

8

IK3

IM2

5

ED

BR

A19

BR

A

R–Y

R–Y

23

ABS & TRAC ECU

Ts

R–Y

J/C

J30

R–Y

3

DLC1

J/C

E

1

A

Ts

16

J24

8

IK3

IM2

5

ED

BR

A19

BR

A

R–Y

R–Y

23

ABS & TRAC ECU

Ts

R–Y

J/C

J30

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

ABS & TRACTION CONTROL SYSTEM

DI–315

467

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

DI0CM–01

DI–316

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

468

1997 LEXUS ES300 (RM511U)

2

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

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace ABS & TRAC ECU.