Lexus ES300 (1997 year). Service manual — part 375

DI0BY–01

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

DI–277

429

1997 LEXUS ES300 (RM511U)

DIAGNOSTIC TROUBLE CODE CHART

HINT:Using SST 09843 –18020, connect the terminals Tc and E

1

.

If a malfunction code is displayed during the DTC check, check the circuit listed that the code. For details
of each code, turn to the page referred to under the ”See page” for respective ”DTC No.” in the DTC chart.

DTC No.

(See Page)

Detection Item

Trouble Area

11

(

DI–240

)

Open circuit in ABS & TRAC solenoid relay circuit

ABS & TRAC solenoid relay

ABS & TRAC

l

id

l

i

it

12

(

DI–240

)

Short circuit in ABS & TRAC solenoid relay circuit

ABS & TRAC solenoid relay circuit

ECU

13

(

DI–286

)

Open circuit in ABS & TRAC motor relay circuit

ABS & TRAC motor relay

ABS & TRAC

t

l

i

it

14

(

DI–286

)

Short circuit in ABS & TRAC motor relay circuit

ABS & TRAC motor relay circuit

ECU

21

(

DI–289

)

Open or short circuit in right front solenoid circuit

ABS & TRAC actuator

SFRR or SFRH circuit

ECU

22

(

DI–289

)

Open or short circuit in left front solenoid circuit

ABS & TRAC actuator

SFLR or SFLH circuit

ECU

23

(

DI–289

)

Open or short circuit in right rear solenoid circuit

ABS & TRAC actuator

SRRR or SRRH circuit

ECU

24

(

DI–289

)

Open or short circuit in left rear solenoid circuit

ABS & TRAC actuator

SRLR or SRLH circuit

ECU

25

(

DI–289

)

Open or short circuit in SMC1 circuit

ABS & TRAC actuator

SMC1 circuit

ECU

26

(

DI–289

)

Open or short circuit in SMC2 circuit

ABS & TRAC actuator

SMC2 circuit

ECU

27

(

DI–289

)

Open or short circuit in SRC1 circuit

ABS & TRAC actuator

SRC1 circuit

ECU

28

(

DI–289

)

Open or short circuit in SRC2 circuit

ABS & TRAC actuator

SRC2 circuit

ECU

31

(

DI–292

)

Right front wheel speed sensor signal malfunction

32

(

DI–292

)

Left front wheel speed sensor signal malfunction

Right front, left front, right rear and left rear speed sensor

Each speed sensor circuit

33

(

DI–292

)

Right rear wheel speed sensor signal malfunction

Each s eed sensor circuit

Speed sensor rotor

ECU

34

(

DI–292

)

Left rear wheel speed sensor signal malfunction

41

(

DI–297

)

Low battery positive voltage or abnormally high battery

positive voltage

Battery

IC regulator

Power source circuit

ECU

43*

(

DI–300

)

Malfunction in ABS control system

ABS control system

DI–278

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

430

1997 LEXUS ES300 (RM511U)

44*

(

DI–301

)

Open or short circuit in NE signal circuit

NEO circuit

ECM

ECU

49

(

DI–303

)

Open circuit in stop light switch circuit

Stop light switch

Stop light switch circuit

ECU

51

(

DI–305

)

Pump motor is locked

ABS pump motor

53*

(

DI–306

)

Malfunction in ECM communication circuit

TRC+ or TRC – circuit

EFI+ or EFI– circuit

ECM

ECU

61*

(

DI–307

)

Malfunction in engine control system

Engine control system

Always ON

(

DI–308

)

Malfunction in ECU

ECU

*: TRAC OFF indicator light blinking

DI0BZ–01

F00079

SLIP Indicator Light
TRAC OFF Indicator Light
ABS Warning Light

DLC1

DLC2

Rear Speed Sensor

Sensor Rotor

ABS & TRAC Actuator

ABS & TRAC ECU

TRAC OFF Switch

ABS & TRAC
Solenoid Relay

ABS & TRAC
Motor Relay

Sensor Rotor

Front Speed Sensor

Stop Light Switch

Front Speed Sensor

–

DIAGNOSTICS

ABS &

TRACTION CONTROL

SYSTEM

DI–279

431

1997

L

EXUS ES300 (RM51

1

U

)

P

ARTS

LOCA

TION

DI0C0–01

R05698

A19

A20

A21

1

2

3

4

5

6

7

8

9

10

21

11

12

13

14

15

16

17

18

19

20

22

23

24

25

26

1

2

3

4

5

4

6

7

8

9

10

11

12

13

14

16

15

1

2

3

5

6

7

8

9

10

11

12

DI–280

–

DIAGNOSTICS

ABS & TRACTION CONTROL SYSTEM

432

1997 LEXUS ES300 (RM511U)

TERMINALS OF ECM

Symbols (Terminals No.)

STD Voltage (V)

Condition

IG1(A20 – 8) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON

R+ (A19 – 1) – SR (A19 – 11)

9 – 14

IG switch ON, ABS warning light OFF

R+ (A19 – 1) – MR (A19 – 24)

Below 1.0

IG switch ON

SFRR (A19 – 26) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SFRH (A19 – 13) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SFLR (A21 – 1) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SFLH (A21 – 2) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SRRR (A21 – 7) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SRRH (A21 – 8) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SRLR (A19 – 12) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

SRLH (A19 – 25) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

AST (A19 – 10) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

WA (A20

4)

GND (A19

15 A21

9 10)

Below 2.0

IG switch ON, ABS warning light ON

WA (A20 – 4) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light OFF

STP (A20

16)

GND (A19

15 A21

9 10)

Below 1.5

Stop light switch OFF

STP (A20 – 16) – GND (A19 – 15, A21 – 9, 10)

8 – 14

Stop light switch ON

D/G (A19 – 22) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, ABS warning light ON

Tc (A19 – 9) – GND (A19 – 15, A21 – 9, 10)

8 – 14

IG switch ON

Ts (A19 – 23) – GND (A19 – 15, A21 – 9, 10)

8 – 14

IG switch ON

FR+ (A19 – 17) – FR– (A19 – 18)

AC generation

IG switch ON

Slowly turn right front wheel

FL+ (A19 – 5) – FL– (A19 – 4)

AC generation

IG switch ON

Slowly turn left front wheel

RR+ (A20 – 9) – RR– (A20 – 10)

AC generation

IG switch ON

Slowly turn right rear wheel

RL+ (A20 – 2) – RL– (A20 – 1)

AC generation

IG switch ON

Slowly turn left rear wheel

MT (A19 – 14) – GND (A19 – 15, A21 – 9, 10)

Below 1.5

IG switch ON

SRC1 (A21 – 5) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, TRAC OFF indicator light OFF

SRC2 (A21 – 6) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, TRAC OFF indicator light OFF

SMC1 (A21 – 12) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, TRAC OFF indicator light OFF

SMC2 (A21 – 6) – GND (A19 – 15, A21 – 9, 10)

10 – 14

IG switch ON, TRAC OFF indicator light OFF

NEO (A20 – 15) – GND (A19 – 15, A21 – 9, 10)

Pulse generation

Idling

EFI+ (A20 – 6) – GND (A19 – 15, A21 – 9, 10)

Pulse generation

IG switch ON

EFI– (A20 – 14) – GND (A19 – 15, A21 – 9, 10)

Pulse generation

IG switch ON