TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1769
1963 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 remote mirror control 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
MIRR SEL SW RRemote control mirror switch pas-
senger side/ON or OFF
ON: Remote control mirror switch
passenger side is selected
OFF: Remote control mirror switch
passenger side is not selected
±
MIRR SEL SW LRemote control mirror switch driv-
er side/ON or OFF
ON: Remote control mirror switch
driver side is selected
OFF: Remote control mirror switch
driver side is not selected
±
MIRR POS SW RRemote control mirror switch R
position/ON or OFF
ON: Remote control mirror switch
R position is selected
OFF: Remote control mirror switch
R position is not selected
±
MIRR POS SW LRemote control mirror switch L
position/ON or OFF
ON: Remote control mirror switch
L position is selected
OFF: Remote control mirror switch
L position is not selected
±
MIRR POS SW UPRemote control mirror switch UP
position/ON or OFF
ON: Remote control mirror switch
UP position is selected
OFF: Remote control mirror switch
UP position is not selected
±
MIRR POS SW DWNRemote control mirror switch
DOWN position/ON or OFF
ON: Remote control mirror switch
DOWN position is selected
OFF: Remote control mirror switch
DOWN position is not selected
±
OK:
The indication on the tester switches between ON and OFF in accordance with the remote con-
trol mirror switch status.
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI±1686).
NG

DI±1770
± DIAGNOSTICSBODY CONTROL SYSTEM
1964 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check remote control mirror switch (See page BE±115).
NG Replace remote control mirror switch.
OK
3 Check voltage between remote control mirror switch and battery, remote control
mirror switch and body ground.
PREPARATION:
(a) Disconnect the remote control mirror switch connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals R5±6 (B) and R5±2 (E) of the remote control mirror switch.
OK:
Voltage: 10 to 14 V
NG Repair or replace harness or connector.
OK
4 Check wire harness and connector between remote control mirror switch and re-
mote control mirror (See page IN±35).
NG Repair or replace harness or connector.
OK
5 Check retract motor operation (See page BE±115).
NG Replace remote control mirror.
OK

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1771
1965 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check wire harness and connector between remote control mirror switch and re-
mote control mirror (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).

I28525
D24
Driving Position
Memory Switch
MM
M1
M2 Body ECU
B624
1
2
3 MRY
M1
M2 SET
J8 J/C
IEW±BAB6
B623
22
41
2L
L±Y
G
E DI±1772
± DIAGNOSTICSBODY CONTROL SYSTEM
1966 Author: Date:
2005 SEQUOIA (RM1146U)
Driving position memory switch circuit (w/ Driving position
memory)
CIRCUIT DESCRIPTION
The position control ECU & switch assy memorizes the driver seat position and the outer mirror positions.
It controls each motor when the driving position memory switch is operated.
The position signals of the driving position memory switch received by the body ECU are sent to the position
control ECU and switch assy via BEAN.
WIRING DIAGRAM
DID9D±01

± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1773
1967 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check driving position memory switch (See page DI±1518).
NG Replace driving position memory switch.
OK
2 Check wire harness and connector between driving position memory switch and
body ECU, driving position memory switch and body ground
(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).

DI±1774
± DIAGNOSTICSBODY CONTROL SYSTEM
1968 Author: Date:
2005 SEQUOIA (RM1146U)
Glass breakage sensor ECU circuit
CIRCUIT DESCRIPTION
The glass breakage sensor microphone detects the sound of metal (and other) objects striking the windows
and outputs a signal to the glass breakage sensor ECU. Sound of breaking window glass is amplified (fixed
frequency) by the resonator provided in front of the microphone.
The glass breakage sensor ECU receives a signal from the glass breakage sensor microphone. If the signal
matches the specification, the ECU outputs the glass breakage signal to the body ECU.
The body ECU receives the signal from the glass breakage sensor ECU and outputs a warning.
DID9E±01

I28589
Glass Breakage
Sensor ECU
G5 Glass Breakage
Sensor Microphone
(Shielded) G4 GBSI
MI+
MI±
GND
GBIG
GB+BMIC
GNDBody ECU
DOP B5
G4
G4
G4
G4
G4Sub J/B No. 4
Sub J/B No. 3 4C 4D
3B 3A
Instrument Panel J/B
F10
Fusible LBI18
Ignition SW
Engine Room J/BHTR
AM1 1E
1J
1L1C
1E
1C
ALT
2C 2DECU±BShort Pin
Battery
IG AM1 IG1J43
J/CA
A
81
45 812 4
2
6 3 4
1 W±R
W
BW±L
B W±RB±Y W±R
O 11
R±Y R±Y33O
18 4
6 3
5P
439
B
2 1
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1775
1969 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1776
± DIAGNOSTICSBODY CONTROL SYSTEM
1970 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals GBIG, GB+B and GND of glass breakage sen-
sor ECU.
PREPARATION:
Disconnect the glass breakage sensor ECU connector.
CHECK:
Measure the voltage between terminals GB+B and GND of the glass breakage sensor ECU.
OK:
Voltage: 10 to 14 V
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals GBIG and GND of the glass breakage sensor ECU.
OK:
Voltage: 10 to 14 V
NG Repair or replace wire harness or connector.
OK
2 Check wire harness and connector between glass breakage sensor ECU and
body ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
3 Check wire harness and connector between glass breakage sensor ECU and
glass breakage sensor microphone (See page IN±35).
NG Repair or replace harness or connector.
OK

I28726
G4
I28727
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±1777
1971 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check glass breakage sensor ECU (microphone output).
PREPARATION:
(a) Reconnect the glass breakage sensor ECU, glass break-
age sensor microphone and body ECU connectors.
(b) Connect an oscilloscope to terminal G4±3 of the glass
breakage sensor ECU and body ground.
(c) Turn the ignition switch ON.
CHECK:
Check the signal waveform according to the condition(s) in the
table below.
ItemCondition
Tool setting12 V/DIV, 300 ms/DIV
Vehicle condition
Tap the glass breakage sensor micro-
phone with a hard object such as your
fingernail.
OK:
As shown in the illustration.
NG Replace glass breakage sensor microphone.
HINT:
If the problem recurs even after replacement, replace the glass
breakage sensor ECU.
OK
Proceed to next circuit inspection shown in
problem symptoms table
(See page DI±1686).

DIDEI±01
DI±1778
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
1972 Author: Date:
2005 SEQUOIA (RM1146U)
DRIVER DOOR CONTROL SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77