Lexus RX300 (MCU15). Service manual — part 352

I03214

P8
Power Window Motor RH (*1)
P7
Power Window Motor LH (*2)

R

Passenger Door ECU

G

UP

DN

PLS

LMT

SGND

1

15

20

8

12

LG–B

LG

LG–R

Power Window
Motor

Pulse Sensor

Limit SW

2 (*1)

1 (*2)

3

4

5

F17

F17

F17

F17

F17

1 (*1)

2 (*2)

*1: LHD
*2: RHD

DI–640

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

LEXUS RX300 (RM785E)

Jam protection pulse switch circuit

CIRCUIT DESCRIPTION

Jam protection pulse switch is built–in the power window motor. Pulse switch outputs ON/OFF pulse when
the motor rotates.

WIRING DIAGRAM

DI2F6–06

–

DIAGNOSTICS

PASSENGER DOOR CONTROL SYSTEM

DI–641

LEXUS RX300 (RM785E)

INSPECTION PROCEDURE

1

Check jam protection pulse switch (See page BE–84).

NG

Replace the power window motor.

OK

2

Check wireharness and connector between jam protection pulse switch and pas-
senger door ECU.

NG

Repair or replace wireharness or connector.

OK

Proceed to next circuit inspection shown on
problems symptoms table
(See page DI–624).

DI2F9–07

Customer Problem Analysis

Vehicle Brought to Workshop

Problem Symptom Confirmation

Symptom Simulation

Symptom does not
occur

Circuit Inspection

Identification of Problem

Repair

Confirmation Test

End

Titles inside

are titles of pages in this

manual, with the page number indicated in
the bottom portion. See the indicated pages
for detailed explanations.

1

2

3

6

5

8

P. IN–22

P. DI–678

P. DI–643

P. DI–648

Symptom
occur

Step 6, 8 : Diagnostic steps permitting the use of the
hand–held tester.

7

Multiplex communication system inspection *

4

Problem Symptoms Table

P. DI–647

*: Confirm that there is no trouble by
basic inspection and DTC check.

DI–642

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

LEXUS RX300 (RM785E)

REAR LEFT DOOR CONTROL SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:
This ECU is connected to the multiplex communication system. Therefore, be sure to check that there is no
troubles in the multiplex communication system before performing the troubleshooting.

DI2FB–03

REAR LEFT DOOR CONTROL SYSTEM Check Sheet

Inspector’s name:

Customer’s Name

Date Vehicle

Registration No.

Registration Year

Frame No.

Odometer Reading

/ /

km
Mile

Weather Conditions
When Problem
Occurred

Date Problem First Occurred

Frequency Problem Occurs

Weather

/ /

"" Once only

Brought in

Malfunction
System

Outdoor Temperature

"" Fine "" Cloudy ""Rainy ""Snowy
"" Various/ Others

"" Hot ""Warm "" Cool
"" Cold (Approx. °F ( °C))

"" Constant "" Sometimes ( times per day, month)

"" Power Window Control System

"" Power Door Lock Control System

"" Theft Deterrent System

"" Others

"" Jam Protection System

–

DIAGNOSTICS

REAR LEFT DOOR CONTROL SYSTEM

DI–643

LEXUS RX300 (RM785E)

CUSTOMER PROBLEM ANALYSIS CHECK