Toyota Sequoia (2005). Manual — part 358
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1227
1421
DTC
B1660/43 Passenger Airbag ON/OFF Indicator
Malfunction
CIRCUIT DESCRIPTION
The passenger airbag ON/OFF indicator circuit consists of the airbag sensor assembly and the integration
control and panel.
This circuit indicates the operation condition of the front passenger airbag assembly, the side airbag assem-
bly RH and seat belt pretensioner RH.
DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B1660/43
The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short
circuit to B+ signal in the passenger airbag
ON/OFF indicator circuit for 2 seconds.
Passenger airbag ON/OFF indicator malfunction
Airbag sensor assembly malfunction
Integration control and panel
(Passenger airbag ON/OFF indicator)
Airbag sensor assembly
Cowl wire
DIDH1–01
H23994
Airbag Sensor
Assembly
PAON
A20
IM1
IGN1
23
4
L
16
I19
Passenger Airbag ON/OFF Indicator
(Integration Control and Panel)
3E
Sub J/B No. 3
5
P–AB
A20
17
IG2
A20
21
E1
A20
25
E2
A20
26
V
IM1
3
17
2
PAON
P–AB
IG+
3A
15
L
V
R–L
R–L
GAUGE
1C
2
1A
3
1E
7
1C
4
B
B–Y
I18
Ignition SW
IG1
AM1
IG2
AM2
2
6
5
1
Instrument Panel J/B
W–L
W–R
Instrument Panel J/B
Instrument Panel J/B
1A
1A
6
8
1F
1F
9
10
W–B
W–B
A
A
J8
J/C
W–B
W–B
1C
3
1C
6
1J
7
1L
1
AM1
W
W–R
Engine Room J/B
2C
1
2D
1
AM2
F10
Fusible Link Block
8
4
5
B
Battery
ALT
IE
B–R
2
1
B
DI–1228
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1422
WIRING DIAGRAM
H22552
Ignition Switch
Passenger Airbag
ON/OFF Indicator
(”ON”)
Passenger Airbag
ON/OFF Indicator
(”OFF”)
ON
OFF
A
B
C
4 sec.
2 sec.
4 sec.
2 sec.
ON/OFF condition depends on the
front passenger detection results.
ON
OFF
ON
OFF
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1229
1423
INSPECTION PROCEDURE
1
Check passenger airbag ON/OFF indicator.
CHECK:
(a)
Turn the ignition switch to the ON position.
(b)
Check the passenger airbag ON/OFF indicator operation.
HINT:
Refer to the normal condition of the passenger airbag ON/OFF indicator (see page
RESULT:
A:
During period ”A” in the illustration, even if both the ”ON” and ”OFF” passenger airbag ON/OFF
indicators normally come on, both of them do not go off during period ”B”.
During periods ”A” and ”B” in the illustration, even if both the ”ON” and ”OFF” passenger air-
bag ON/OFF indicators normally come on, both of them come on during period ”C”.
B:
During period ”A”, neither the ”ON” nor ”OFF” passenger airbag ON/OFF indicators come on,
or either of them does not come on.
During period ”C”, even if the front passenger seat is occupied, neither the ”ON” nor ”OFF”
passenger airbag ON/OFF indicators come on.
B
Go to step 7.
A
H24023
DI–1230
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1424
2
Check integration control and panel (passenger airbag ON/OFF indicator).
PREPARATION:
(a)
Turn the ignition switch to the LOCK position.
(b)
Disconnect the negative (–) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c)
Disconnect the connectors from the airbag sensor as-
sembly.
(d)
Connect the negative (–) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a)
Turn the ignition switch to the ON position.
(b)
Check the passenger airbag ON/OFF indicator operation.
OK:
Neither the ”ON” nor ”OFF” passenger airbag ON/
OFF indicators come on.
NG
Go to step 3.
OK
Replace airbag sensor assembly (see page
).
3
Prepare for inspection.
PREPARATION:
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a)
Turn the ignition switch to the LOCK position.
(b)
Disconnect the negative (–) terminal cable from the battery, and wait for at least 90 seconds.
(c)
Disconnect the connectors from the airbag sensor assembly.
(d)
Disconnect the connectors from the steering wheel pad.
(e)
Disconnect the connectors from the front passenger airbag assembly.
(f)
w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g)
w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h)
Disconnect the connectors from the front seat outer belt LH and RH.
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