Lexus RX300 (MCU15). Manual — part 330

DI–552

–

DIAGNOSTICS

COMBINATION METER SYSTEM

LEXUS RX300 (RM785E)

3

Check combination meter circuit plate (See page BE–68).

NG

Replace combination meter circuit plate.

OK

Replace A/C and combination meter inte-
grated ECU.

DI1RK–04

Customer Problem Analysis

Vehicle Brought to Workshop

Problem Symptom Confirmation

Symptom Simulation

Symptom does not occur

Problem Symptom Table

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

5

6

8

Step 6, 8 : Diagnostic steps permitting the use

of the hand–held tester and break–
out–box.

P. DI–554

P. DI–557

P. IN–22

P. DI–558 – DI–562

Symptom occur

7

Multiplex Communication System inspection*

4

P. DI–676

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

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–553

LEXUS RX300 (RM785E)

SLIDING ROOF SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:
The ECU of this system is connected to the multiplex communication system. Therefore, before starting trou-
bleshooting, make sure to check that there is no trouble in the multiplex communication system.

DI1RL–03

DI–554

–

DIAGNOSTICS

SLIDING ROOF SYSTEM

LEXUS RX300 (RM785E)

CUSTOMER PROBLEM ANALYSIS CHECK

SLIDING ROOF CONTROL SYSTEM Check Sheet

Inspector’s name:

Customer’s Name

Date of Vehicle

Registration No.

Registration Year

Frame No.

Odometer Reading

/ /

km
Mile

Weather Conditions
When Problem
Occurred

Frequency Problem Occurs

Weather

Outdoor temperature

/ /

j

Constant j Sometimes ( Times per day, month)

j

Once only

Brought in

j

Sliding roof control system does not operate.

Date Problem First Occurred

j

Fine j Cloudy j Rainy j Snowy

j

Various/Others

j

Hot j Warm j Cool

j

Cold (Approx. °F ( °C))

Problem

Symptom

j

Sliding roof operates abnormally or stops half way.

j

Jam protection system does not operate.

DI1RM–04

I19272

Instrument Panel J/B
D S/ROOF Fuse
D ECU–IG Fuse

Sliding Roof Gear Assembly
D Sliding Roof ECU
D Sliding Roof Motor

Sliding Roof Switch

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DIAGNOSTICS

SLIDING ROOF SYSTEM

DI–555

LEXUS RX300 (RM785E)

PARTS LOCATION