2001 TOYOTA SEQUOIA door lock

DI±1722
± DIAGNOSTICSBODY CONTROL SYSTEM
1916 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between door lock motor and body 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).

I24354
BHW±BW±B
W±BP±B
W±BBA1Body ECU
432 D18
Door Unlock Detection SW
Rear LH
B7 LSWL
2
BC12
1
3
BC1
BKB5 LSWR 3
BA1
P±L
D19
Door Unlock Detection SW
Rear RH
P±B P±B21 24
P±L P±LJ/C
LE
J30
J29
J/C
J45 J44FM
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1723
1917 Author: Date:
2005 SEQUOIA (RM1146U)
Rear Door unlock detection switch circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. 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.
WIRING DIAGRAM
DI574±10

DI±1724
± DIAGNOSTICSBODY CONTROL SYSTEM
1918 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check rear door unlock detection switch (See page BE±79).
NG Replace door lock motor assembly.
OK
2 Check wire harness and connector between door unlock detection switch and
body ECU, door unlock detection switch and body ground (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).

I24356
32
1J 1E W±RBody ECU
RDA ECU±B
4
52D
5
4
B5PRG B
OW±R
B5 5
IG1
BatterySHORT PIN Engine Room J/B
1
2C8
Sub J/B No. 3
3A2
3A1
RDA PRG W2
Wireless Door
Control Receiver
+B
EV
R±G 3
2 W±RInstrument Panel J/B
F10
Fusible
Link
Block
BW±R
A J43
J/C
O
A
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1737
1931 Author: Date:
2005 SEQUOIA (RM1146U)
Wireless door lock receiver circuit
CIRCUIT DESCRIPTION
The signal from the transmitter is sent to the body ECU through RDA line of the wireless door control receiver.
RDA line is diagnosed by the body ECU, check DTC also in case of the failure of the wireless function.
WIRING DIAGRAM
DI6LV±13

DI±1738
± DIAGNOSTICSBODY CONTROL SYSTEM
1932 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check that DTC B1242 is not indicated (See page DI±1829).
OK:
DTC B1242 is not indicated.
NG Go to multiplex communication system
(See page DI±1892).
OK
2 Check wire harness and connector (PRG circuit).
PREPARATION:
Disconnect the connectors of the wireless door lock receiver and body ECU.
CHECK:
Check continuity between terminal W2±3 (PRG) of the wireless door lock receiver and terminal B5±5 (PRG)
of the body ECU.
OK:
Continuity
NG Repair or replace wire harness or connector.
OK
3 Check voltage between terminals +B and E of wireless door lock receiver.
CHECK:
Measure the voltage between terminals W2±5 (+B) and W2±1 (E) of the wireless door lock receiver.
OK:
Voltage: 10 to 14 V
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1739
1933 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check wireless door lock receiver.
PREPARATION:
Check that malfunction disappears when another wireless door lock receiver in good condition is installed.
CHECK:
Check wireless door lock function.
OK:
The wireless door lock system operates normally.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
OK
Failure of the original wireless door lock re-
ceiver.
5 Check wire harness and connector (RDA circuit).
PREPARATION:
Disconnect the wireless door lock receiver connector.
CHECK:
Check continuity between terminal W2±2 (RDA) of the wireless door lock receiver and terminal B5±4 (RDA)
of the body ECU.
OK:
Continuity
NG Repair or replace harness or connector.
OK
6 Check voltage between terminals +B and E of wireless door lock receiver.
CHECK:
Measure the voltage between terminals W2±5 (+B) and W2±1 (E) of the wireless door lock receiver.
OK:
Voltage: 10 to 14 V
NG Repair or replace harness or connector.
OK

DI±1740
± DIAGNOSTICSBODY CONTROL SYSTEM
1934 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check wireless door lock receiver.
PREPARATION:
Check that malfunction disappears when another wireless door lock receiver in good condition is installed.
CHECK:
Check wireless door lock function.
OK:
The wireless door lock system operates normally.
NG Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
OK
Failure of the original wireless door lock re-
ceiver.

I18739
2
1
BUZZERLG7
IA1
EDBody ECU
W1
Wireless Door
Lock Buzzer
BZR LG
B715
W±B
A
J28
J/C
A
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1741
1935 Author: Date:
2005 SEQUOIA (RM1146U)
Wireless door lock buzzer circuit
CIRCUIT DESCRIPTION
The body ECU receives a door OPEN/CLOSE demand signal from the wireless transmitter via the wireless
door lock receiver. The ECU then sounds the wireless door lock buzzer as an answer back.
WIRING DIAGRAM
DI6LW±13