TOYOTA SEQUOIA 2001 Service Repair Manual

I18724
Back Door ECU
LSWB
B106
21
R±Y B13
Back Door Unlock
Detection Switch
R±L
B1022
LSWE
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1869
2063 Author: Date:
2005 SEQUOIA (RM1146U)
Back 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 is in
the unlock position and OFF when the door lock is in the lock position. The ECU detects the door lock condi-
tions in this circuit. It is used as one of the operating conditions for the theft deterrent system.
WIRING DIAGRAM
DI57L±12

DI±1870
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2064 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 the back 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.
BACK±DOOR:
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
LOCK POS SW
Back door lock posi-
tion SW signal/ON or
OFFON: Back door lock is in unlock position
OFF: Back door lock is in lock position±
OK:
Indication on the tester switches between ON and OFF in accordance with the back door unlock
detection switch status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1854).
NG
2 Check back door unlock detection switch (See page BE±79).
NG Replace the back door unlock detection switch.
OK

± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1871
2065 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between back door unlock detection switch
and back 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±1854).

I18723
Back Door ECU
ACT+
B1015
3 4
L±R B13
Back Door Lock Motor
L±B
B1014
ACT± DI±1872
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2066 Author: Date:
2005 SEQUOIA (RM1146U)
Back door lock motor circuit
CIRCUIT DESCRIPTION
When the back door ECU receives a LOCK/UNLOCK demand signal from the body ECU or back door key
lock and unlock switch, etc., it operates the back door lock motor based on the signal.
WIRING DIAGRAM
DI94G±05

± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1873
2067 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 the back door lock motor 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, perform the ACTIVE TEST.
BACK±DOOR:
ItemTest detailsDiagnostic note
DOOR LOCKOperate the door lock motor at rear door LOCK/
UNLOCK±
OK:
Back door lock motor operates normally.
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI±1854).
NG
2 Check back door lock motor (See page BE±79).
NG Replace the back door lock motor.
OK
3 Check wire harness and connector between back door lock motor and back 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±1854).

I28432
Back Door ECU
B10
B1025
13 4
1W
P B14
Back Door
Power Window Motor
BDDN
BDUP D
U DI±1874
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2068 Author: Date:
2005 SEQUOIA (RM1146U)
Back door power window motor circuit
CIRCUIT DESCRIPTION
The back door power window goes down when voltage is applied to the BDDN terminal of the back door
ECU, and the window goes up when voltage is applied to the BDUP terminal.
WIRING DIAGRAM
DI94H±05

± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1875
2069 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 the back door power window motor 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, perform the ACTIVE TEST.
BACK±DOOR:
ItemTest detailsDiagnostic note
P/W UP/DOWNOperate the back door power window Motor UP/
DOWNDuring this ACTIVE TEST, jam protection caught
detection can be monitored.
OK:
Back door power window operates normally.
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI±1854).
NG
2 Check back door power window motor (See page BE±75).
NG Replace the back door power window motor.
OK

DI±1876
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2070 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between back door power window motor and
back 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±1854).

I28433
Back Door ECU
DSG B1023
6
2
LG±B B14
Back Door Power
Window Motor
W±R
B1011
DSV 5
3 PLS2
PLS1
SSRBLG±RP
B1017
DS1 B1016
DS2 E
Pulse
Sensor
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
DI±1877
2071 Author: Date:
2005 SEQUOIA (RM1146U)
Back door power window pulse sensor circuit
CIRCUIT DESCRIPTION
Two pulse sensors are built into the back door power window motor. The back door ECU detects movement
and position of the back door window based on information from these pulse sensors.
WIRING DIAGRAM
DI94I±04

DI±1878
± DIAGNOSTICSBACK DOOR CONTROL SYSTEM
2072 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 the back door power window pulse sensor 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.
BACK±DOOR:
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
P/W POSITION
Back door power win-
dow position/CLOSE
or OPENCLOSE: Back door power window is fully closed
OPEN: Back door power window is opened±
OK:
Indication on the tester switches between CLOSE and OPEN in accordance with the back door
power window status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1854).
NG
2 Check back door power window pulse sensor (See page BE±75).
NG Replace the back door power window regulator
assembly.
OK