Lexus ES300 (2002 year). Manual — part 286

F13038

2

(+)

(-)

24

25

ON

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

05-273

426

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

INSPECTION PROCEDURE

1

CHECK SKID CONTROL ECU CONNECTOR SECURELY CONNECTED

NG

CONNECT CONNECTOR TO ECU

OK

2

RECONFIRM DTC(See page

05-239

)

A

Normal Code

B

Malfunction Code

B

REPAIR CIRCUIT INDICATED BY OUTPUT
CODE

A

3

CHECK VOLTAGE OF ECU IG POWER SOURCE

(a)

Disconnect the skid control ECU connector.

(b)

Turn the ignition switch ON.

(c)

Measure the voltage between terminals 25 and 2 or 24 of
the skid control ECU connector.
OK: 10 - 14 V

NG

CHECK AND REPLACE HARNESS AND
CONNECTOR

OK

F13040

13

ON

24

2

05-274

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

427

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

4

CHECK ABS WARNING LIGHT

In case of using the hand-held tester:
(a)

Select the item ”ABS WARN LIGHT” in the ACTIVE TEST and operate the ABS warning light on the
hand-held tester.

(b)

Check that ”ON” and ”OFF” operation of the ABS warning light can be done on the combination meter
by the hand-held tester.

In case of not using the hand-held tester:
(a)

Disconnect the skid control ECU connector.

(b)

Using a service wire, connect terminal WA (13) and GND
(2 or 24) of the skid control ECU connector.

(c)

Turn the ignition switch ON.
OK: ABS warning light turns off

OK

CHECK AND REPLACE BRAKE ACTUATOR
ASSY

NG

CHECK AND REPLACE HARNESS AND CONNECTOR

F41975

Skid Control ECU
with Actuator

Combination Meter

Passenger Side J/B

I14
Ignition SW

FL MAIN

Battery

55

65

57

13

W

W

ABS

Engine Room R/B

54

87

3B

3B

3B

3B

C7

C7

2M

2R

1

2E

2A

32

B-G

1

1

B-G

W-B

IA

4

IF4

64

10

3

AM1

IG1

BR

R-B

WA

40

21

B-Y

ID

IG1 Relay

AM1

8

2

C7

2

S1

Driver Side J/B

8

5

3A

1

ALT

W-B

B-G

2A

2

2

1

GAUGE1

2

W

W

W

W

3A

R-B

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

05-275

428

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

ABS WARNING LIGHT CIRCUIT (REMAINS ON)

CIRCUIT DESCRIPTION

If the ECU detects trouble, it lights the ABS warning light while at the same time prohibiting ABS control. At
this time, the ECU records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the ABS warning light blink and output the DTC.

WIRING DIAGRAM

055XV-02

05-276

-

DIAGNOSTICS

ABS WITH EBD SYSTEM

429

2002 LEXUS ES300 REPAIR MANUAL (RM911U)

INSPECTION PROCEDURE

1

RECONFIRM DTC(See page

05-239

)

A

Normal Code

B

Malfunction Code

B

REPAIR CIRCUIT INDICATED BY OUTPUT
CODE

A

2

CHECK HARNESS AND CONNECTOR(See page

01-31

)

NG

REPAIR OR REPLACE HARNESS OR
CONNECTOR

OK

CHECK AND REPLACE BRAKE ACTUATOR ASSY