2001 TOYOTA SEQUOIA O2 sensor

C84216
H10600C92968H24657
CG
TCDTC B1656/38 DLC3Airbag
Sensor
Assembly
Front Seat
Inner Belt LH
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1225
1419 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check front seat inner belt LH.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly
and the front seat inner belt LH.
(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 B1656/38 is not output.
HINT:
Codes other than DTC B1656/38 may be output at this time, but
they are not related to this check.
NG Go to step 8.
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).
8 Replace front seat inner belt LH.
(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) Replace the front seat inner belt LH (see page BO±112, BO±126).
HINT:
Perform inspection using parts from a normal vehicle if possible.
NEXT

C84216
H10600C92968H24657
CG
TCDTC B1656/38 DLC3Airbag
Sensor
Assembly
Front Seat
Inner Belt LH
DI±1226
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1420 Author: Date:
2005 SEQUOIA (RM1146U)
9 Check airbag sensor assembly.
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, 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 B1656/38 is not output.
HINT:
Codes other than DTC B1656/38 may be output at this time, but
they are not related to this check.
NG Replace airbag sensor assembly
(see page RS±82).
OK
END

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1227
1421 Author: Date:
2005 SEQUOIA (RM1146U)
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 ConditionTrouble 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
IGN123
4
L
16 I19
Passenger Airbag ON/OFF Indicator
(Integration Control and Panel)
3ESub J/B No. 3
5P±AB A2017
IG2 A2021
E1 A2025
E2 A2026 V
IM13
17
2 PAON
P±AB
IG+3A15 L
V
R±L
R±L
GAUGE 1C2
1A3
1E7
1C4B
B±Y I18
Ignition SW
IG1 AM1
IG2 AM22
6 5 1
Instrument Panel J/B W±L
W±RInstrument Panel J/B
Instrument Panel J/B
1A
1A6
8 1F
1F9
10 W±B
W±B A
A J8
J/C
W±B W±B
1C3
1C61J7
1L 1 AM1
W W±REngine Room J/B
2C1
2D1 AM2
F10
Fusible Link Block
84
5
B
BatteryALT
IE B±R
2
1B DI±1228
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1422 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H24023
DI±1230
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1424 Author: Date:
2005 SEQUOIA (RM1146U)
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 ºONº nor ºOFFº passenger airbag ON/
OFF indicators come on.
NG Go to step 3.
OK
Replace airbag sensor assembly (see page RS±82).
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.
NEXT

H01015G27651H23985
Cowl Wire
Airbag
Sensor
Assembly Integration
Control and Panel
A
B
C D
P±ABPAON
A20
H01015G27651H23985
Cowl Wire
Airbag
Sensor
Assembly Integration
Control and Panel
A
B
C D
P±ABPAON
A20
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1231
1425 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check cowl wire (short to ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±17 (P±AB) ±
Body groundAlways1 MW or higher
A20±23 (PAON) ±
Body groundAlways1 MW or higher
NG Repair or replace cowl wire.
OK
5 Check cowl wire (short).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A20±17 (P±AB) ±
A20±23 (PAON)Always1 MW or higher
NG Repair or replace cowl wire.
OK

H10600H01012H01069H24008
Airbag
Sensor
Assembly Integration
Control
and Panel
DLC3
TC CG
DTC B1660/43
DI±1232
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1426 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check integration control and panel.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) Connect the connector to the integration control and pan-
el.
(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 B1660/43 is not output.
HINT:
Codes other than DTC B1660/43 may be output at this time, but
they are not related to this check.
NG Replace integration control and panel
(see page BO±89).
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).

H24027
Integration Control and Panel:
IG+ I19
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1233
1427 Author: Date:
2005 SEQUOIA (RM1146U)
7 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.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH.
(h) Disconnect the connectors from the front seat outer belt LH.
NEXT
8 Check cowl wire (source voltage).
PREPARATION:
(a) Disconnect the connector from the integration control and
panel.
(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.
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
I19±2 (IG+) ±
Body groundIgnition switch ON10 to 14 V
NG Repair or replace cowl wire (integration control
and panel ± battery).
OK