Lexus ES300 (1997 year). Service manual — part 385

F00114

TRAC OFF
Indicator Light

ABS & TRAC ECU

C J29

C10

GAUGE

R–L

A

3

DLC2

17

J/C

J/C

2

IJ1

TRC

Instrument Panel J/B

1D

J4

J28

D

6

19

L

A20

D

R–L

C10

L

L

L

J28

A

A20

TRAC Cut Switch

W–B

12

11

LG

WT

CSW

J8

J15

4

1

II

J9

A

8

1J

W–B

A

J/C

1J

7

Instrument Panel J/B

W–B

A

J/C

TRAC OFF
Indicator Light

ABS & TRAC ECU

C J29

C10

GAUGE

R–L

A

3

DLC2

17

J/C

J/C

2

IJ1

TRC

Instrument Panel J/B

1D

J4

J28

D

6

19

L

A20

D

R–L

C10

L

L

L

J28

A

A20

TRAC Cut Switch

W–B

12

11

LG

WT

CSW

J8

J15

4

1

II

J9

A

8

1J

W–B

A

J/C

1J

7

Instrument Panel J/B

W–B

A

J/C

TRAC OFF
Indicator Light

ABS & TRAC ECU

C J29

C10

GAUGE

R–L

A

3

DLC2

17

J/C

J/C

2

IJ1

TRC

Instrument Panel J/B

1D

J4

J28

D

6

19

L

A20

D

R–L

C10

L

L

L

J28

A

A20

TRAC Cut Switch

W–B

12

11

LG

WT

CSW

J8

J15

4

1

II

J9

A

8

1J

W–B

A

J/C

1J

7

Instrument Panel J/B

W–B

A

J/C

TRAC OFF
Indicator Light

ABS & TRAC ECU

C J29

C10

GAUGE

R–L

A

3

DLC2

17

J/C

J/C

2

IJ1

TRC

Instrument Panel J/B

1D

J4

J28

D

6

19

L

A20

D

R–L

C10

L

L

L

J28

A

A20

TRAC Cut Switch

W–B

12

11

LG

WT

CSW

J8

J15

4

1

II

J9

A

8

1J

W–B

A

J/C

1J

7

Instrument Panel J/B

W–B

A

J/C

TRAC OFF
Indicator Light

ABS & TRAC ECU

C J29

C10

GAUGE

R–L

A

3

DLC2

17

J/C

J/C

2

IJ1

TRC

Instrument Panel J/B

1D

J4

J28

D

6

19

L

A20

D

R–L

C10

L

L

L

J28

A

A20

TRAC Cut Switch

W–B

12

11

LG

WT

CSW

J8

J15

4

1

II

J9

A

8

1J

W–B

A

J/C

1J

7

Instrument Panel J/B

W–B

A

J/C

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

DI–317

469

1997 LEXUS ES300 (RM511U)

TRAC OFF Indicator, TRAC Cut Switch Circuit

CIRCUIT DESCRIPTION

This is the TRAC control main switch. When the TRAC cut switch is pushed on, TRAC control goes off and
the TRAC OFF indicator lights up. This indicator blinks for warnings when the trouble occurs and for
displaying DTC.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check DTC.

Check DTC on page

DI–273

.

YES

Repair circuit indicated by the code output.

NO

DI0CN–01

F00052

1

4

(+)

(–)

3 2

DI–318

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

470

1997 LEXUS ES300 (RM511U)

2

Check TRAC cut switch.

PREPARATION:
(a)

Remove TRAC cut switch.

(b)

Disconnect TRAC cut switch connector.

CHECK:
Measure resistance between terminals 1 and 4 of TRAC cut
switch when TRAC cut switch is on and off.
OK:

TRAC cut switch

Resistance

Pushed in

Continuity

Released

1 M

Ω

or higher

NG

Replace TRAC cut switch.

OK

3

Check for open and short in harness and connector between terminal CSW of
ABS & TRAC ECU and TRAC cut switch and body ground (See page

IN–27

).

NG

Repair or replace combination meter.

OK

4

Check TRAC OFF indicator light.

See combination meter troubleshooting on page

BE–58

.

NG

Repair or replace combination meter.

OK

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

DI–319

471

1997 LEXUS ES300 (RM511U)

5

Check for open and short in harness and connector between terminal WT of ABS
& TRAC ECU and TRAC OFF indicator light (See page

IN–27

).

NG

Repair or replace harness connector.

OK

Check and replace ABS & TRAC ECU.

F00097

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

Instrument Panel J/B

1D

R–L

C10

C8

IND

2

GAUGE

J/C

J4

LG

18

A20

R–L

SLIP Indicator Light

ABS & TRAC ECU

IJ1

3

4

LG

3

D

D

DI–320

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

472

1997 LEXUS ES300 (RM511U)

SLIP Indicator Light Circuit

CIRCUIT DESCRIPTION

The SLIP indicator blinks during TRAC operation.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

Check SLIP indicator light.

See combination meter troubleshooting on page

BE–58

.

NG

Repair or replace combination meter.

OK

2

Check for short in harness and connector between ABS & TRAC ECU and SLIP
indicator light (See page

IN–27

).

NG

Repair or replace harness or connector.

OK

Check and replace ABS & TRAC ECU.

DI0CP–01