Lexus RX300 (MCU15). Manual — part 341
I19263
Body ECU
B7 PKB
R–B
19
P3
Parking Brake SW
J/B No. 5
1
R–W
2
5A
6
5A
DI–596
–
DIAGNOSTICS
BODY CONTROL SYSTEM
LEXUS RX300 (RM785E)
Parking brake switch circuit
WIRING DIAGRAM
DI1P5–05
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–597
LEXUS RX300 (RM785E)
INSPECTION PROCEDURE
HINT:
In case of using the hand–held tester, start the inspection from step 1 and in case of not using the hand–held
tester, start from step 2.
1
Check parking brake switch using hand–held tester.
PREPARATION:
Connect the hand–held tester to the DLC 3.
CHECK:
Check the parking brake switch using DATA LIST.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page DI–570).
NG
2
Check parking brake switch (See page BE–68).
NG
Replace the parking brake switch.
OK
3
Check wireharness and connector between parking brake switch and Body ECU.
NG
Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table
(See page DI–570).
DI2BH–12
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–599
P. DI–603
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–602
*: Confirm that there is no trouble by
basic inspection and DTC check.
DI–598
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
DRIVER 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.
DI2BI–03
DRIVER 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
DRIVER DOOR CONTROL SYSTEM
DI–599
LEXUS RX300 (RM785E)
CUSTOMER PROBLEM ANALYSIS CHECK
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