Lexus RX300 (MCU15). Service manual — part 359

DI–666

–

DIAGNOSTICS

REAR RIGHT DOOR CONTROL SYSTEM

LEXUS RX300 (RM785E)

INSPECTION PROCEDURE

1

Check ECU–B, GAUGE and P RR DOOR fuse.

CHECK:
Check continuity of ECU–B,GAUGE and P RR DOOR fuse.
OK:
Continuity

NG

Replace the failure fuse.

OK

2

Check voltage between terminals BDR,CPUB, SIG and GND of rear right door
ECU connector.

PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals SIG, and GND.
OK:

Voltage: 10 – 14V

PREPARATION:
(a)

Turn ignition switch OFF.

(b)

Disconnect the rear right door ECU connector.

CHECK:
Measure voltage between terminals BDR, CPUB and GND.
OK:

Voltage: 10 – 14V

OK

Proceed to next circuit inspection shown on
problem symptoms table (See page DI–664).

NG

–

DIAGNOSTICS

REAR RIGHT DOOR CONTROL SYSTEM

DI–667

LEXUS RX300 (RM785E)

3

Check wireharness and connector between ECU and body ground.

NG

Repair or replace wireharness or connector.

OK

Check and repair wireharness and connector
between ECU and battery.

I03215

D10 Door Lock Motor
and Door Unlock
Detection Switch

19

L–B

Rear Right Door ECU

LSWE

A–

A+

LSW

1

13

17

GR–R

L–R

GR

2

3

6

4

R16

R16

R16

R16

DI–668

–

DIAGNOSTICS

REAR RIGHT DOOR CONTROL SYSTEM

LEXUS RX300 (RM785E)

Door lock motor circuit

WIRING DIAGRAM

DI2FK–06

–

DIAGNOSTICS

REAR RIGHT DOOR CONTROL SYSTEM

DI–669

LEXUS RX300 (RM785E)

INSPECTION PROCEDURE

1

Check door lock motor (See page BE–97).

NG

Replace the door lock motor.

OK

2

Check wireharness and connector between door lock motor and rear right door
ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problem symptoms table
(See page DI–570).