Toyota Sequoia (2005). Manual — part 495
I28589
Glass Breakage
Sensor ECU
G5 Glass Breakage
Sensor Microphone
(Shielded)
G4
GBSI
MI+
MI–
GND
GBIG
GB+B
MIC
GND
Body ECU
DOP
B5
G4
G4
G4
G4
G4
Sub J/B No. 4
Sub J/B No. 3
4C
4D
3B
3A
Instrument Panel J/B
F10
Fusible LB
I18
Ignition SW
Engine Room J/B
HTR
AM1
1E
1J
1L
1C
1E
1C
ALT
2C
2D
ECU–B Short Pin
Battery
IG
AM1 IG1
J43
J/C
A
A
8
1
4
5
8
1
2
4
2
6
3
4
1
W–R
W
B
W–L
B
W–R
B–Y
W–R
O
1
1
R–Y
R–Y
3
3
O
1
8
4
6
3
5
P
4
3
9
B
2
1
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1775
1969
WIRING DIAGRAM
DI–1776
–
DIAGNOSTICS
BODY CONTROL SYSTEM
1970
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
).
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
NG
Repair or replace harness or connector.
OK
I28726
G4
I28727
–
DIAGNOSTICS
BODY CONTROL SYSTEM
DI–1777
1971
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.
Item
Condition
Tool setting
12 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
DIDEI–01
DI–1778
–
DIAGNOSTICS
DRIVER DOOR CONTROL SYSTEM
1972
DRIVER DOOR CONTROL SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System Name
See Page
Back Door Power Window Control System
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