TOYOTA SEQUOIA 2001 Service Repair Manual

H10600H01007H43920H23364
DLC3
CG TCDTC B1653/35
Seat
Position
Airbag
Sensor
AssemblyAirbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1219
1413 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 for 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC B1653/35 is not output.
HINT:
Codes other than DTC B1653/35 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

H23244
Airbag Sensor Assembly
A1910
LBE+ G
4 B18 (*1)
Buckle SW LH
Seat Position Airbag Sensor Assembly
*1: The connectors of the seat position airbag sensor assembly and the
front seat inner belt LH (buckle switch LH) are in common use.
Buckle
SW
6R
A1918
LBE± DI±1220
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1414 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1656/38 Seat Belt Buckle Switch (LH) Malfunction
CIRCUIT DESCRIPTION
The seat belt buckle switch LH circuit consists of the airbag sensor assembly and the front seat inner belt
LH.
DTC B1656/38 is recorded when a malfunction is detected in the seat belt buckle switch LH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1656/38

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 seat belt buckle
switch LH circuit for 2 seconds.

Front seat inner belt LH malfunction

Airbag sensor assembly malfunction

Front seat inner belt LH

Airbag sensor assembly

Floor wire No. 2
WIRING DIAGRAM
DIDH0±01

C84216
H10600C92968H24657
CG
TCDTC B1656/38
DLC3Airbag
Sensor
Assembly Front Seat
Inner Belt LH
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1221
1415 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 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 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).

H03353G27651H24026H24551
Airbag
Sensor
Assembly
LBE+
LBE± Front Seat
Inner Belt LH
B C D
A
Service Wire
Floor Wire No. 2
A19
B18
4
6
DI±1222
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1416 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 front seat inner
belt 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 front seat inner belt LH.
(b) Using a service wire, connect B18±4 and B18±6 of con-
nector ºCº.
NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A19±10 (LBE+) ±
A19±18 (LBE±)AlwaysBelow 1 W
NG Repair or replace floor wire No. 2.
OK

C91384H01010G27652H23572
Airbag
Sensor
Assembly
A19
A
B C D
LBE+
LBE±
Front Seat
Inner Belt LH
Floor Wire No. 2
C91384H01010G27652H23572
Airbag
Sensor
Assembly
A19
A
B C D
LBE+
LBE±
Front Seat
Inner Belt LH
Floor Wire No. 2
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1223
1417 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check floor wire No. 2 (short).
PREPARATION:
Disconnect the service wire from connector ºCº.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A19±10 (LBE+) ±
A19±18 (LBE±)Always1 MW or higher
NG Repair or replace floor wire No. 2.
OK
5 Check floor wire No. 2 (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
A19±10 (LBE+) ±
Body groundIgnition switch ONBelow 1 V
A19±18 (LBE±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace floor wire No. 2.
OK

C91384H01010G27652H23572
Airbag
Sensor
Assembly
A19
A
B C D
LBE+
LBE±
Front Seat
Inner Belt LH
Floor Wire No. 2
DI±1224
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1418 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check floor wire No. 2 (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
A19±10 (LBE+) ±
Body groundAlways1 MW or higher
A19±18 (LBE±) ±
Body groundAlways1 MW or higher
NG Repair or replace floor wire No. 2.
OK

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