2001 TOYOTA SEQUOIA door lock

DI1PQ±11
I28436
Instrument Panel J/B
BDR
CPUB
GND W±R
W±B
AW±R Engine Room J/B F10
Fusible Link BlockI18
Ignition SW
IF Battery BB 4 5ALT
8
W1L1AM1
121C6
17
1FW±L1 2 B±YIG1 AM1
1C4 ECU±IG
4
1F B±R AAJ/C
B±R
II27
B±R19
L±Y20
II23
L±Y
1
2D 2C8 SHORT PIN
ECU±B
Sub J/B No. 3
3D
3ASIG
PWR No. 2
Instrument Panel J/B
3
1J2
1E
11
II2
W±B J12
J/C12
8 6
II2 W±RFront Passenger Door ECU
W±R 11F18 J37
B±R
Sub J/B No. 3
3A 3C88J38 F18
F18 F18
F18 F18
F18 F1821
25
23
13 (*1) (*2)
(*1) (*2)
(*1) (*2)
(*1) (*2)
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory DI±1826
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2020 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the passenger door ECU.
WIRING DIAGRAM

I28437
D21
Door Unlock Detection
SW Front RH
3 R±Y4
LSWP
LSWE W±B 4Front Passenger
Door ECU
13 24
9 F18 F18
F18 F18
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory(*1) (*2)
(*1) (*2)
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1829
2023 Author: Date:
2005 SEQUOIA (RM1146U)
Door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor. This switch is ON when the door lock knob
is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the door lock
knob conditions in this circuit. It is used as one of the operating conditions for the key confinement prevention
function.
WIRING DIAGRAM
DI1Q8±09

DI±1830
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2024 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not using the hand±held tester,
start from step 2.
1 Check door unlock detection switch using hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
According to the display on the tester, read the DATA LIST.
P±DOOR:
ItemMeasurement Item/Dis-
play (Range)Normal conditionDiagnostic Note
LOCK POS SWLock position SW signal/
ON or OFFON: Door lock is in unlock position
OFF: Door lock is in lock position±
OK:
Indication on the tester switches between ON and OFF in accordance with the door unlock
detection switch status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1818).
NG
2 Check door unlock detection switch (See page BE±79).
NG Replace the door lock assembly.
OK

± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1831
2025 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between door unlock detection switch and
passenger door ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1818).

I28438
D21
Door Key Lock and
Unlock SW Front RH
LSWE
PKUL
PKL 13
2
3 W±B
LG±R
LG±B 4
1
2Front Passenger
Door ECU
F18 F18
*1: w/ Driving Position Memory
*2: w/o Driving Position Memory(*1) (*2)
F18 F18
F18 F189
10
22 (*1) (*2)
(*1) (*2) DI±1832
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2026 Author: Date:
2005 SEQUOIA (RM1146U)
Door key lock and unlock switch circuit
CIRCUIT DESCRIPTION
The door key lock and unlock switch is built in the door lock motor. When the key is turned to the lock side,
terminal 2 of the switch is grounded and when the key is turned to the unlock side, terminal 1 of the switch
is grounded.
The door key lock and unlock switch can be checked using the DTC check (refer to DI±1904).
WIRING DIAGRAM
DI1Q9±09

± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1833
2027 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check the door key lock and unlock switch (See page BE±79).
NG Replace the door key lock and unlock switch.
OK
2 Check wire harness and connector between door key lock and unlock switch
and passenger door ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1818).

I28443
F18
Front Passenger Door ECUD22
Driver Door ECU
WLSW 7
R±L E
J7 J/C
E
J6
R±L
R±LII15
LSW7
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
DI±1843
2037 Author: Date:
2005 SEQUOIA (RM1146U)
Window lock switch circuit
CIRCUIT DESCRIPTION
The power window lock switch circuit can be checked using the DTC check (refer to DI±1904).
The window lock switch is built in the passenger door ECU. Voltage applied to the LSW terminal of the pas-
senger door ECU is shut off when the window lock switch is turned to the LOCK position. The power main
relay stops power supply to the other power window control switches.
WIRING DIAGRAM
DI1PE±16

DI±1844
± DIAGNOSTICSPASSENGER DOOR CONTROL SYSTEM
2038 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
When using the hand±held tester, start the inspection from step 1 and when not using the hand±held tester,
start from step 2.
Check if DTC B1223 of the multiplex communication system is output. When the DTC is not output, proceed
to the following procedures and when it is output, perform inspection (see page DI±1904).
1 Check window lock switch using hand±held tester.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
According to the display on the tester, read the DATA LIST.
P±DOOR:
ItemMeasurement Item/Dis-
play (Range)Normal conditionDiagnostic Note
P P/W AUTO SWP/W auto SW signal/
ON or OFFON: P/W auto UP/DOWN SW is ON
OFF: P/W auto UP/DOWN SW is OFF±
LOCK POS SWLock position SW signal/
ON or OFFON: Door lock is in unlock position
OFF: Door lock is in lock position±
OK:
Indication on the tester switches between ON and OFF in accordance with the window lock
switch status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1818).
NG
2 Check wire harness and connector between passenger door ECU and driver
door ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI±1818).