Page 1945 of 4323
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1743
1937 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between wireless door lock buzzer and body
ECU, body ground and wireless door lock buzzer (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).
Page 1946 of 4323
I24358
Body ECU
P2
Parking
Brake SWPKB
14
B53
4
LG±R LG±RSub J/B No. 4
4D 4C DI±1744
± DIAGNOSTICSBODY CONTROL SYSTEM
1938 Author: Date:
2005 SEQUOIA (RM1146U)
Parking brake switch circuit
CIRCUIT DESCRIPTION
The body ECU determines if the parking brake switch is ON or OFF and sends the parking brake switch ON/
OFF signal to the combination meter via BEAN.
WIRING DIAGRAM
DI29Y±18
Page 1947 of 4323
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1745
1939 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 parking brake 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 ºDATA LISTº.
BODY ECU:
ItemMeasurement Item/Display
(Range)Normal ConditionDiagnostic Note
PARKING BRAKE SWParking brake switch/ON or OFF
ON:
Parking brake pedal depressed
(ON)
OFF:
Parking brake released (OFF)
±
OK:
The indication on the tester switches between ON and OFF in accordance with the parking
brake switch status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
NG
2 Check parking brake switch (See page BE±55).
NG Replace parking brake switch.
OK
Page 1948 of 4323
DI±1746
± DIAGNOSTICSBODY CONTROL SYSTEM
1940 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness and connector between parking brake switch 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).
Page 1949 of 4323
I28519
W±B
BA1
P8
Power Window
Motor Rear LHP3
Power Window Control
Switch Rear LH
G±R
B7
B7RLU
RLD BA1
B5
B5 BC1
BC1G±R G±R
G±Y
G±Y G±Y
RRU
RRD L
W±BUP
BH DWNLL
BK W±B D U E25
13
BA1 BC1
13 W±BD UE
UP
DWN
P4
Power Window Control
Switch Rear RH
P9
Power Window
Motor Rear RHLL
L26 1
4
119
20
4 6
1 2
G 2
15 R
2
G 2 13
16
3Body ECU
J/C
B
J CI
J30 J29
J/C
D
J45 J44K
EL
J45J44 J30
J29
5 RB
B4
4From PWR No. 4 Fuse
From PWR No. 3 Fuse
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1747
1941 Author: Date:
2005 SEQUOIA (RM1146U)
Rear power window switch circuit
CIRCUIT DESCRIPTION
The rear power window switch controls the UP/DOWN function of the rear power window motor.
The driver door ECU (power window master switch) operates the remote control of each window UP/DOWN
function via BEAN.
WIRING DIAGRAM
DI6LS±11
Page 1950 of 4323

DI±1748
± DIAGNOSTICSBODY CONTROL SYSTEM
1942 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 rear 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 ºACTIVE TESTº.
BODY ECU:
ItemTest DetailsDiagnostic Note
RL P/W UP/DOWNRear left passenger power window DOWN/UPCaution: This test causes vehicle parts to move.
Watch your hands and feet.
RR P/W UP/DOWNRear right passenger power window DOWN/UPCaution: This test causes vehicle parts to move.
Watch your hands and feet.
OK:
The rear power windows go up or down correctly when operating them through the hand±held
tester.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
NG
2 Check power window control switch rear (See page BE±69).
NG Replace power window switch rear.
OK
3 Check wire harness and connector between power window control switch rear
and body ECU (See page IN±35).
NG Repair or replace wire harness or connector.
OK
Page 1951 of 4323
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1749
1943 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check power window motor rear (See page BE±69).
NG Replace power window motor rear.
OK
5 Check voltage between power window control switch rear and battery, power
window control switch rear and body ground.
PREPARATION:
Disconnect the power window control switch rear connector.
CHECK:
Measure the voltage between terminals P3±4 (B) and P3±3 (E), and terminals P4±4 (B) and P4±3 (E) of the
power window control switch rear.
OK:
Voltage: 10 to 14 V
NG Repair or replace harness or connector.
OK
6 Check wire harness and connector between power window motor rear and pow-
er window control switch rear (See page IN±35).
NG Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).
Page 1952 of 4323
I18747
Body ECU
Instrument Panel J/BHEAD
TAIL
A G±Y
G
L±R (*1)B6
137 9
H
TELA
OFF
TAIL
HEAD
AUTO Light
Control
Switch
16
W±B
1B7 9
1F J8
J/C
W±B
A
IE10
14 12
(*1): w/ Automatic Light ControlB6
B6
C8
Combination Switch DI±1750
± DIAGNOSTICSBODY CONTROL SYSTEM
1944 Author: Date:
2005 SEQUOIA (RM1146U)
Light control switch circuit
CIRCUIT DESCRIPTION
The body ECU detects the light control switch position and drives the DRL No. 4 and HEAD relays.
If the vehicle is equipped with an automatic light control system, the light control switch includes the AUTO
position.
The body ECU turns the headlights ON and OFF based on the ambient light level outside the vehicle, which
is detected by the automatic light control sensor.
WIRING DIAGRAM
DI1OL±27