Lexus ES300 (2002 year). Service manual — part 316

F41998

Skid Control ECU

TS

10

S7

LG-B

D3

DLC3

SG

W-B

5

14

3B

Driver Side J/B

SB

2L

8

2R

8

IA

W-B

3B

Passenger Side J/B

TS

80

70

LG-B

J3
J/C

A

A

C52361

Ts

CG

DLC3

05-382

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

535

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

TS TERMINAL CIRCUIT

CIRCUIT DESCRIPTION

In the sensor check mode, a malfunction of the speed sensor that cannot be judged when the vehicle is
stopped is judged while driving.
Transition to the sensor check mode can be performed by connecting terminals Ts and CG of the DLC3 and
turning the ignition switch from OFF to ON.

WIRING DIAGRAM

INSPECTION PROCEDURE

1

INSPECT DLC3 TERMINAL VOLTAGE(TS TERMINAL)

(a)

Turn the ignition switch ON.

(b)

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

OK

Go to step 3

NG

052B8-03

C52361

Ts

CG

DLC3

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

05-383

536

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

2

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

(a)

Check for open and short circuit in harness and connector between terminal Ts of the DLC3 and skid
control ECU, CG of DLC3 and body ground (See page

01-31

).

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE SKID CONTROL ECU ASSY

3

INSPECT ABS AND VSC WARNING LIGHT

SST

09843-18040

(a)

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

(b)

Turn the ignition switch ON.

(c)

Check the ABS and VSC warning right.
OK: Warning light blinking

OK

END

NG

CHECK AND REPLACE SKID CONTROL ECU ASSY

055XK-02

F07812

S1

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

05-249

402

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

TERMINALS OF ECU

Symbols (Terminal No.)

Wiring Color

Condition

STD Voltage (V)

+BS (S1-1) - GND (S1-2, 24)

L - W-B

Always

11 - 14

FL+ (S1-9) - FL- (S1-8)

BR - Y

IG switch ON, slowly turn left front wheel

AC generation

STP (S1 10)

GND (S1 2 24)

G W

W B

Stop light switch ON

10 - 14

STP (S1-10) - GND (S1-2, 24)

G-W - W-B

Stop light switch OFF

Below 1.0

RL+ (S1-11) - RL- (S1-12)

R - G

IG switch ON, slowly turn left rear wheel

AC generation

WA (S1 13)

GND (S1 2 24)

R B

W B

IG switch ON, ABS warning light ON

10 - 14

WA (S1-13) - GND (S1-2, 24)

R-B - W-B

IG switch ON, ABS warning light OFF

Below 2.0

D/G (S1 - 14) -

GND (S1-2, 24)

W - W-B

IG switch ON

10 - 14

T (S1

15)

GND (S1 2 24)

LG B

W B

IG

it h ON

10

14

Ts (S1 - 15) - GND (S1-2, 24)

LG-B - W-B

IG switch ON

10 - 14

Tc (S1-16) - GND (S1-2, 24)

P-B - W-B

IG switch ON

10 - 14

PKB (S1 18)

GND (S1 2 24)

R W

W B

IG switch ON, parking switch ON

Below 1.0

PKB (S1-18) - GND (S1-2, 24)

R-W - W-B

IG switch ON, parking switch OFF

10 - 14

+BM (S1-23) - GND (S1-2, 24)

L - W-B

Always

11 - 14

IG (S1-25) - GND (S1-2, 24)

B-R - W-B

IG switch ON

10 - 14

FR+ (S1-31) - FR- (S1-30)

W - B

IG switch ON, slowly turn right front wheel

AC generation

RR+ (S1-33) - RR- (S1-34)

P - L

IG switch ON, slowly turn right rear wheel

AC generation

BRL (S1 32)

GND (S1 2 24)

R Y

W B

IG switch ON, brake warning light ON

10 - 14

BRL (S1-32) - GND (S1-2, 24)

R-Y - W-B

IG switch ON, brake warning light OFF

Below 2.0

F41999

Skid Control ECU

71

TC

19

S7

P-B

D3

DLC3

TC

CG

80

70

Passenger Side J/B

SB

IA

4

13

P-B

3B

3B

3B

3B

21

Driver Side J/B

2L

2R

8

8

W-B

W-B

C52361

Tc

CG

DLC3

05-380

-

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

533

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(TC TERMINAL VOLTAGE)

(a)

Turn the ignition switch ON.

(b)

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

OK

Go to step 3

NG

052B7-03