Lexus RX300 (MCU15). Manual — part 347
DI2ES–08
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–621
P. DI–625
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–624
*: Confirm that there is no trouble by
basic inspection and DTC check
DI–620
–
DIAGNOSTICS
PASSENGER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
PASSENGER 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.
DI2ET–03
PASSENGER 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 Mirror Control System
"" Power Door Lock Control System
"" Theft Deterrent System
"" Others
"" Jam Protection System
–
DIAGNOSTICS
PASSENGER DOOR CONTROL SYSTEM
DI–621
LEXUS RX300 (RM785E)
CUSTOMER PROBLEM ANALYSIS CHECK
DI2FS–09
I19271
Power Window Motor
D Jam Protection Limit Switch
D Jam Protection Pulse Switch
Passenger Door ECU
Door Lock Assembly
D Door Courtesy Switch
D Door Unlock Detection Switch
D Door Lock Motor
Courtesy Light
DI–622
–
DIAGNOSTICS
PASSENGER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
PARTS LOCATION
DI2EV–10
I07350
F17
PASSENGER DOOR ECU
–
DIAGNOSTICS
PASSENGER DOOR CONTROL SYSTEM
DI–623
LEXUS RX300 (RM785E)
TERMINALS OF ECU
Symbols (Terminals No.)
Wiring Color
Condition
STD Voltage (V)
UP ↔ GND
R ↔ W B
Ignition switch ON and driver’s window switch OFF
Below 1.0
UP ↔ GND
(F17–1 ↔ F17–25)
R ↔ W–B
Ignition switch ON and driver’s window switch UP
10 – 14
A– ↔ GND
L Y ↔ W B
Door lock switch OFF or LOCK
Below 1.0
A ↔ GND
(F17–2 ↔ F17–25)
L–Y ↔ W–B
Door lock switch UNLOCK
10 – 14
SIG ↔ GND
(F17–5 ↔ F17–25)
R–L ↔ W–B
Ignition switch ON
10 – 14
KL ↔ GND
P ↔ W B
Door key lock and unlock switch OFF or UNLOCK
10 – 14
KL ↔ GND
(F17–6 ↔ F17–25)
P ↔ W–B
Door key lock and unlock switch LOCK
Below 1.0
LMT ↔ SGND
LG ↔ LG R
Driver’s door window fully–closed position
10 – 14
LMT ↔ SGND
(F17–8 ↔ F17–12)
LG ↔ LG–R
Driver’s door window except fully–closed position
Below 1.0
A+ ↔ GND
L R ↔ W B
Door lock switch OFF or UNLOCK
Below 1.0
A+ ↔ GND
(F17–13 ↔ F17–25)
L–R ↔ W–B
Door lock witch LOCK
10 – 14
BDR ↔ GND
(F17–14 ↔ F17–25)
L–B ↔ W–B
Constant
10 – 14
DN ↔ GND
G ↔ W B
Ignition switch ON and driver’s window switch OFF
Below 1.0
DN ↔ GND
(F17–15 ↔ F17–25)
G ↔ W–B
Ignition switch ON and driver’s window switch DOWN
10 – 14
LSW ↔ GND
GR ↔ W B
Driver’s door is locked
10 – 14
LSW ↔ GND
(F17–16 ↔ F17–25)
GR ↔ W–B
Driver’s door is unlocked
Below 1.0
CTY ↔ GND
R W ↔ W B
Driver’s door is closed
10 – 14
CTY ↔ GND
(F17–17 ↔ F17–25)
R–W ↔ W–B
Driver’s door is open
Below 1.0
CPUB ↔ GND
(F17–18 ↔ F17–25)
W–L ↔ W–B
Constant
10 – 14
KUL ↔ GND
P L ↔ W B
Door key lock and unlock switch OFF or LOCK
10 – 14
KUL ↔ GND
(F17–19 ↔ F17–25)
P–L ↔ W–B
Door key lock and unlock switch UNLOCK
Below 1.0
During the driver’s door power window is operate.
Pulse generation
PLS ↔ SGND
(F17 20 ↔ F17 12)
LG–B ↔ LG–R
Driver’s door power window not operate with switch ON
Below 1.0
(F17–20 ↔ F17–12)
Driver’s door power window not operate with switch OFF
10 – 14
CTYB ↔ CYL
L B ↔ G W
Driver’s door closed
Below 1.0
CTYB ↔ CYL
(F17–21 ↔ F17–4)
L–B ↔ G–W
Driver’s door open
10 – 14
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