Lexus RX300 (MCU15). Manual — part 342
DI2BJ–11
I19270
Driver Door ECU
Door Lock Assembly
D Door Courtesy Switch
D Door Unlock Detection Switch
DDoor Lock Motor
Power Window Motor
D Jam Protection Limit Switch
D Jam Protection Pulse Switch
Courtesy Light
DI–600
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
PARTS LOCATION
DI2BK–12
I07350
D12
DRIVER DOOR ECU
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
DI–601
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
(D12–1 ↔ D12–25)
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
(D12–2 ↔ D12–25)
L–Y ↔ W–B
Door lock switch UNLOCK
10 – 14
SIG ↔ GND
(D12–5 ↔ D12–25)
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
(D12–6 ↔ D12–25)
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
(D12–8 ↔ D12–12)
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
(D12–13 ↔ D12–25)
L–R ↔ W–B
Door lock witch LOCK
10 – 14
BDR ↔ GND
(D12–14 ↔ D12–25)
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
(D12–15 ↔ D12–25)
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
(D12–16 ↔ D12–25)
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
(D12–17 ↔ D12–25)
R–W ↔ W–B
Driver’s door is open
Below 1.0
CPUB ↔ GND
(D12–18 ↔ D12–25)
G–B
*1
↔ W–B
W–L
*2
Constant
10 – 14
KUL ↔ GND
P L ↔ GR R
Door key lock and unlock switch OFF or LOCK
10 – 14
KUL ↔ GND
(D12–19 ↔ D12–25)
P–L ↔ GR–R
Door key lock and unlock switch UNLOCK
Below 1.0
During the driver’s door power window is operate.
Pulse generation
PLS ↔ SGND
(D12 20 ↔ D12 12)
LG–B ↔ W–B
Driver’s door power window not operate with switch ON
Below 1.0
(D12–20 ↔ D12–12)
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
(D12–21 ↔ D12–4)
L–B ↔ G–W
Driver’s door open
10 – 14
*: Power window master switch
*1: LHD *2: RHD
DI2BL–03
DI–602
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
LEXUS RX300 (RM785E)
PROBLEM SYMPTOMS TABLE
POWER WINDOW CONTROL SYSTEM
Symptom
Suspect Area
See page
All the power windows does not operate.
1. Driver door ECU with master switch
–
Power window does not operate.
1. Driver door ECU with master switch
–
Auto up (or down) function does not operate.
1. Driver door ECU with master switch
–
Jam protection function and auto up (or down) function does not
operate.
1. Jam protection limit switch circuit
2. Jam protection pulse switch circuit
3. Driver door ECU with master switch
DI–616
DI–618
–
OTHERS
Symptom
Suspect Area
See page
Parts of the door does not function.
1. Power source circuit
2. Driver door ECU with master switch
DI–603
DI2BM–13
I19264
SIG
IC2
25
BDR
CPUB
GND
W–B
18
12
9
14
5
D14
J/C
Instrument Panel J/B
Driver Door ECU
D14
D14
D14
1G
10
IC1
J5
A
L–B (*1)
L–B (*1)
(*1)
4
Short Pin
ECU–B
Engine Room J/B
*1: LHD
*2: RHD
IE (*1)
IG (*2)
12
IL1
(*2)
W–B
A
J9
(*1)
(*2)
2A
W
Battery
FL DOOR
1
2I
2
2A
1
5
(*1)
W–L (*2)
W–R
R–L
W
F11 FL Block
ALT
3
P FR DOOR
L–B (*2)
IL1
1
L–B (*2)
1H
6
G–B (*1)
W–L (*2)
G–B (*1)
IL1
9
IC1
9
(*2)
(*1)
IL1
4
IC1
4
(*2)
R–L
1D
1
IG1
B–Y
AM1
GAUGE
1C
7
4
AM1
2
W–L
1C
6
2
1
1A
1
1D
12
W
Ignition
SW
L–B (*2)
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
DI–603
LEXUS RX300 (RM785E)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the driver door ECU.
WIRING DIAGRAM
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