TOYOTA SEQUOIA 2001 Service Repair Manual

± 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

DI±1742
± DIAGNOSTICSBODY CONTROL SYSTEM
1936 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 wireless door lock buzzer 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
BUZZ RESP SOUNDTurn wireless buzzer ON/OFFTurn volume to MAX. if it is a wireless buzzer
equipped vehicle.
OK:
The wireless door lock buzzer sounds normally.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
NG
2 Check wireless door lock buzzer (See page BE±99).
NG Replace wireless door lock buzzer.
OK

± 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).

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

± 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

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).

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

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