2001 TOYOTA SEQUOIA O2 sensor

H10600H01012H24646H24648
CG TCDTC B1630/23
DLC3
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RH
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1193
1387 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
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 horn button assembly.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the front seat 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 assembly LH and RH.
1 Check DTC.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) 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 DI±1147).
(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) Check the DTCs (see page DI±1147).
OK:
DTC B1630/23 is not output.
HINT:
Codes other than DTC B1630/23 may be output at this time, but
they are not related to this check.
NG Go to step 2.
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±1137).

H01015
C91384G27650H23090
Floor Wire
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RH
VUCRESCR
SST
A
B C D
A21
VUCRESCR S27
DI±1194
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1388 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check connections 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 curtain shield air-
bag sensor assembly RH.
OK:
The connectors are connected securely.
NG Connect connectors, then go to step 1.
OK
3 Check floor wire (open).
PREPARATION:
(a) Disconnect the connectors from the airbag sensor as-
sembly and the curtain shield airbag sensor assembly
RH.
(b) Using SST, connect S27±2 (VUCR) and S27±1 (ESCR)
of connector ºCº.
SST SST 09843±18040
CHECK:
Measure the resistance according to the value(s) in the table
below.
Tester ConnectionConditionSpecified Condition
A21±21 (VUCR) ±
A21±19 (ESCR)AlwaysBelow 1 W
NG Repair or replace floor wire.
OK

H01015G27650H23122
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RHFloor Wire
VUCRESCR
A21
A
B
C D
H01015G27650H23122
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RHFloor Wire
VUCRESCR
A21
A
B
C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1195
1389 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check floor wire (short).
PREPARATION:
Disconnect the SST from connector ºCº.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A21±21 (VUCR) ±
A21±19 (ESCR)Always1 MW or higher
NG Repair or replace floor wire.
OK
5 Check floor wire (short to B+).
PREPARATION:
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) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A21±21 (VUCR) ±
Body groundIgnition switch ONBelow 1 V
A21±19 (ESCR) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace floor wire.
OK

H01015G27650H23122
Airbag
Sensor
Assembly
Curtain Shield
Airbag Sensor
Assembly RHFloor Wire
VUCRESCR
A21
A
B
C D
DI±1196
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1390 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check floor wire (short to ground).
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.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A21±21 (VUCR) ±
Body groundAlways1 MW or higher
A21±19 (ESCR) ±
Body groundAlways1 MW or higher
NG Repair or replace floor wire.
OK

H01007
H10600H42066
H40997H24664
Airbag
Sensor
Assembly
CG TCDTC B1630/23
DLC3
Curtain Shield
Airbag Sensor
Assembly LH
DTC B1635/24
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1197
1391 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check curtain shield airbag sensor assembly RH.
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 DI±1147).
(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) Check the DTCs (see page DI±1147).
OK:
DTC B1630/23 is output.A
DTC B1635/24 is output.B
DTC B1630/23 and B1635/24 are not
output.C
HINT:
Codes other than DTC B1630/23 and B1635/24 may be output
at this time, but they are not relevant to this check.
A Replace airbag sensor assembly
(see page RS±82).
B Replace curtain shield airbag sensor assembly
RH (see page RS±97).
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 DI±1137).

H02751
Airbag Sensor Assembly S26
Curtain Shield Airbag
Sensor Assembly LH
A1920
W
2
A1922
B
1 VUCL
ESCLVUCL
ESCL DI±1198
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1392 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1635/24 Curtain Shield Airbag Sensor (LH)
Malfunction
CIRCUIT DESCRIPTION
The curtain shield airbag sensor assembly LH consists of the safing sensor, the diagnosis circuit, the lateral
deceleration sensor, etc.
If the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1635/24 is recorded when a malfunction is detected in the curtain shield airbag sensor LH circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1635/24

The airbag sensor assembly receives a short circuit sig-
nal, an open circuit signal, a short circuit to ground or a
short circuit to B+ signal in the curtain shield airbag sensor
LH circuit for 2 seconds.

Curtain shield airbag sensor assembly LH malfunction

Airbag sensor assembly malfunction

Curtain shield airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
WIRING DIAGRAM
DIDGX±01

H01007
H10600H40997H24650
CGTCDTC B1635/24 DLC3
Curtain Shield Airbag
Sensor Assembly LH
Airbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1199
1393 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
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.
1 Check DTC.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) 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 DI±1147).
(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) Check the DTCs (see page DI±1147).
OK:
DTC B1635/24 is not output.
HINT:
Codes other than DTC B1635/24 may be output at this time, but
they are not related to this check.
NG Go to step 2.
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±1137).

C91384H01010G27652H23575
Curtain Shield
Airbag Sensor
Assembly LH
Floor Wire No. 2
Airbag
Sensor
Assembly
VUCL
ESCL
A
B C D
VUCL ESCLSST
A19S26
DI±1200
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1394 Author: Date:
2005 SEQUOIA (RM1146U)
2 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 curtain shield air-
bag sensor assembly LH.
OK:
The connectors are connected securely.
NG Connect connectors, then go to step 1.
OK
3 Check floor wire No. 2 (open).
PREPARATION:
(a) Disconnect the connectors from the airbag sensor as-
sembly and the curtain shield airbag sensor assembly LH.
(b) Using SST, connect S26±2 (VUCL) and S26±1 (ESCL) of
connector ºCº.
SST 09843±18040
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A19±20 (VUCL) ±
A19±22 (ESCL)AlwaysBelow 1 W
NG Repair or replace floor wire No. 2.
OK