Lexus RX300 (MCU15). Service manual - part 265

F13435

Instrument Panel J/B

HEATER

1K

15

C12

SLIP Indicator

1

IE2

2

C10

W–L

IND

Skid Control ECU

A23

6

7

R–W

W–L

J/B No. 3

R–W

1C

13

B–Y

4

2

Ignition Switch

W

Instrument Panel J/B

1C

6

1A

1

5

3

Fusible Link Block

ALT

Battery

AM1

2

1

IG1 AM1

1

3A

5

3E

W

W–L

DI–292

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300   (RM785E)

SLIP Indicator Light Circuit

CIRCUIT DESCRIPTION

The SLIP indicator blinks during TRC & VSC operation.

WIRING DIAGRAM

DI1HA–06

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

DI–293

LEXUS RX300   (RM785E)

INSPECTION PROCEDURE

HINT:
Start the inspection from step 1 in case of using the hand–held tester and start from step 2 in case of not
using the hand–held tester.

1

Check operation of the SLIP indicator light.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON, and push the hand–held tester main switch ON.

(c)

Select the ACTIVE TEST mode on the hand–held tester.

CHECK:
Check that ”ON” and ”OFF” of the SLIP indicator light can be shown on the combination meter by the hand–
held tester.

OK

Go to step 4.

NG

2

Check that the SLIP indicator light is on for 3 seconds soon after ignition switch
has been turned ON.

OK

Check and replace skid control ECU.

NG

3

Check SLIP indicator light.

See combination meter troubleshooting on page BE–68.

NG

Repair bulb or combination meter assembly
(See page BE–66).

OK

DI–294

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300   (RM785E)

4

Check for open and short circuit in harness and connector between skid control
ECU and SLIP indicator light (See page IN–32).

NG

Repair or replace harness or connector.

OK

Check and replace skid control ECU.

F13436

1C

ECU–IG

1

A23

Instrument Panel J/B

20

BZ

Buzzer

Skid Control ECU

P–B

2

1

2

B–R

10

B–Y

1D

4

Ignition Switch

W–L

Instrument Panel J/B

1C

6

AM1

2

1

1A

1

FL Block

5

3

Battery

ALT

IG1

AM1

W

W

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

DI–295

LEXUS RX300   (RM785E)

VSC Buzzer Circuit

CIRCUIT DESCRIPTION

The VSC buzzer sounds during VSC operation.

WIRING DIAGRAM

DI1HB–06