Lexus RX300 (MCU15). Service manual - part 267

F13438

Skid Control ECU

Ts

3

11

DLC3

W–B

IF

4

14

CG

5B

J/B No. 5

A22

4

W–B

Ts

5B

W–L

DI–300

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300   (RM785E)

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

DI0X6–11

F09679

DLC3

Ts

CG

ON

(+)

(–)

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

DI–301

LEXUS RX300   (RM785E)

INSPECTION PROCEDURE

1

Check voltage between terminals Ts and CG of DLC3.

CHECK:
(a)

Turn the ignition switch ON.

(b)

Measure voltage between terminals Ts and CG of DLC3.

OK:

Voltage: 10 – 14 V

OK

If ABS warning light does not blink even after Ts
and CG have been connected, the ECU may be
defective.

NG

2

Check for open and short circuit in harness and connector between skid control
ECU and DLC3, DLC3 and body ground (See page IN–32).

NG

Repair or replace harness or connector.

OK

Check and replace skid control ECU.

F13953

DI–302

–

DIAGNOSTICS

ABS & BA & TRC & VSC SYSTEM

LEXUS RX300   (RM785E)

Check for Fluid Leakage

Check for fluid leakage from actuator or hydraulic lines.

DI1HC–13

DI6OW–08

Warning Light Check

P. DI–305

END

: Diagnostic steps permitting the use
of the hand–held tester.

P. DI–304

P. DI–305

Symptom Simulation

Normal

DTC Check

Warning Light 
ON

Malfunction Code

Warning Light
Remains OFF

Circuit Inspection

Identification of Problem

Repair

Warning Light Check

P. DI–305

DTC Check (Read Past DTC)

Confirmation Test

Remains ON

Remains OFF

Clear DTC (Present and Past DTC)

Items inside              are titles of pages in this manual,
with the page number in the bottom portion. See the
pages for detailed explanations.

1

2

4

3

5

7

8

9

10

DTC Chart

11

6

P. DI–311

P. IN–22

P. DI–318 to DI–439

Remains OFF

Remains ON

Vehicle Brought to Workshop

Customer Problem Analysis

DTC Check (Read Present DTC)

Step 3, 4, 6, 8, 9, 11

P. DI–305

DTC Check (Read Past DTC)

P. DI–305

P. DI–305

P. DI–305

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–303

LEXUS RX300   (RM785E)

SUPPLEMENTAL RESTRAINT SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING