Toyota Sequoia (2005). Manual — part 352
H01007
H10600 H42066
H40997
H23576
CG
TC
DTC B1630/23
DLC3
Curtain Shield Airbag
Sensor Assembly RH
DTC B1635/24
Airbag
Sensor
Assembly
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1203
1397
7
Check curtain shield airbag sensor assembly LH.
PREPARATION:
(a)
Connect the connectors to the airbag sensor assembly.
(b)
Interchange the curtain shield airbag sensor assembly
RH with LH and connect the connectors to them.
(c)
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, and wait for at
least 60 seconds.
(b)
Clear the DTCs stored in memory (see page
(c)
Turn the ignition switch to the LOCK position.
(d)
Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e)
OK:
DTC B1635/24 is output.
A
DTC B1630/23 is output.
B
DTC B1630/23 and B1635/24 are not
output.
C
HINT:
Codes than other DTC B1630/23 and B1635/24 may be output
at this time, but they are not related to this check.
A
Replace airbag sensor assembly
(see page
).
B
Replace curtain shield airbag sensor assembly
LH (see page
C
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page
H02750
O6
Occupant Classification ECU
FSR+
BL1
3
W
W
A21
16
Airbag Sensor Assembly
A21
24
B
B
BL1
5
FSR–
FSR+
FSR–
8
4
DI–1204
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1398
DTC
B1650/32 Occupant Classification System
Malfunction
CIRCUIT DESCRIPTION
The occupant classification system circuit consists of the airbag sensor assembly and the occupant classifi-
cation system.
If the airbag sensor assembly receives signals from the occupant classification ECU, it determines whether
or not the front passenger airbag assembly, side airbag assembly RH and seat belt pretensioner RH should
be operated.
DTC B1650/32 is recorded when a malfunction is detected in the occupant classification system circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B1650/32
Occupant classification system malfunction
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 occupant classifi-
cation system circuit for 2 seconds.
Airbag sensor assembly malfunction
Occupant classification system
Airbag sensor assembly
Floor wire
Seat wire No. 1
WIRING DIAGRAM
DIDGY–01
H10600 H01065
H08008
H24037
Airbag
Sensor
Assembly
DLC3
CG
TC
Occupant
Classification ECU
DTC B1650/32
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1205
1399
INSPECTION PROCEDURE
1
Check DTC (occupant classification ECU).
CHECK:
(a)
Turn the ignition switch to the ON position, and wait for at least 10 seconds.
(b)
Using the hand–held tester, check the DTCs of the occupant classification ECU (see page
OK:
DTC is not output of the occupant classification ECU.
NG
Go to inspection procedure of DTC output
(see page
OK
2
Check DTC (airbag sensor assembly).
CHECK:
(a)
Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(b)
Clear the DTCs stored in memory (see page
HINT:
First clear DTCs stored in the occupant classification ECU and
then in the airbag sensor assembly.
(c)
Turn the ignition switch to the LOCK position.
(d)
Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e)
OK:
DTC B1650/32 is not output.
HINT:
Codes other than DTC B1650/32 may be output at this time, but
they are not related to this check.
NG
Go to step 3.
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page
DI–1206
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1400
3
Check connection of connectors.
PREPARATION:
(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.
CHECK:
Check that the connectors are properly connected to the airbag sensor assembly and the occupant classifi-
cation ECU.
OK:
The connectors are connected securely.
NG
Connect connectors, then go to step 1.
OK
4
Prepare for inspection.
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a)
Disconnect the connectors from the airbag sensor assembly.
(b)
Disconnect the connectors from the steering wheel pad.
(c)
Disconnect the connectors from the front passenger airbag assembly.
(d)
w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(e)
w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(f)
Disconnect the connectors from the front seat outer belt LH and RH.
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