2001 TOYOTA SEQUOIA ECU

DI±1790
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1984 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector (Driver door ECU ± body ground, battery)
(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±1782).

I18711
D20
Door Unlock Detection
SW Front LHD22
Driver Door ECU
LSWD
LSWE 24
9 R±Y
W±B
34
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1791
1985 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
DI1PG±16

± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1793
1987 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between door unlock detection switch 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±1782).

I18710
D22
Driver Door ECU
D20
Door Key Lock and
Unlock SW Front LH
LSWE
KUL
KL 9
10
22 W±B
LG±R
LG±B 3
6
5 DI±1794
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1988 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 5 of the switch is grounded and when the key is turned to the unlock side, terminal 6 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
DI1PH±17

± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1795
1989 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 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±1686).

I18709
D22
Driver Door ECU
D10
Door Courtesy Light Front LH
CTYB
DCYL 5
6 R
R±W 1 2 DI±1796
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1990 Author: Date:
2005 SEQUOIA (RM1146U)
Door courtesy light circuit
CIRCUIT DESCRIPTION
The door courtesy light comes on when the door is opened and goes off when the door is closed.
WIRING DIAGRAM
DI1PI±18

± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±1797
1991 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check door courtesy light operation.
CHECK:
Check that the door courtesy light comes on when the door is opened, and goes off when the door is closed.
OK:
Door courtesy light normally operates.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1782).
NG
2 Check door courtesy light (See page BE±40).
NG Replace the door courtesy light.
OK
3 Check wire harness and connector between door courtesy light 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±1782).

I28452
D22
Driver Door ECU P6
Power Window Motor
Front LH
DDN
DU 14
1 G
R 2
1 DI±1798
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1992 Author: Date:
2005 SEQUOIA (RM1146U)
Power window motor circuit
CIRCUIT DESCRIPTION
The power window goes down when voltage is applied to terminal 2 of the power window motor, and the
window goes up when voltage is applied to terminal 1.
WIRING DIAGRAM
DI1PJ±09