TOYOTA SEQUOIA 2001 Service Repair Manual

H01016H44043H24013
Airbag
Sensor
Assembly
SFL+
SFL± Side Squib LHFloor Wire No. 2
A
B C
D
S17
H01016H44043H24013
Airbag
Sensor
Assembly
SFL+
SFL± Side Squib LHFloor Wire No. 2
A
B C
D
S17
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1429
1623 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check floor wire No. 2 (short).
PREPARATION:
Release the activation prevention mechanism built into con-
nector ºBº (see page DI±1137).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S17±1 (SFL+) ±
S17±2 (SFL±)Always1 MW or higher
NG Repair or replace floor wire No. 2.
OK
Go to step 8.
3 Check floor wire No. 2 (open).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S17±1 (SFL+) ±
S17±2 (SFL±)AlwaysBelow 1 W
NG Repair or replace floor wire No. 2.
OK
Go to step 9.

H01016H44043H24013
Airbag
Sensor
Assembly
SFL+
SFL± Side Squib LHFloor Wire No. 2
A
B C
D
S17
H01016H44043H24013
Airbag
Sensor
Assembly
SFL+
SFL± Side Squib LHFloor Wire No. 2
A
B C
D
S17
DI±1430
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1624 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check floor wire No. 2 (short to ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S17±1 (SFL+) ±
Body groundAlways1 MW or higher
S17±2 (SFL±) ±
Body groundAlways1 MW or higher
NG Repair or replace floor wire No. 2.
OK
Go to step 9.
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
S17±1 (SFL+) ±
Body groundIgnition switch ONBelow 1 V
S17±2 (SFL±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace floor wire No. 2.
OK
Go to step 9.

H01016H44043H24013
Airbag
Sensor
Assembly
SFL+
SFL± Side Squib LHFloor Wire No. 2
A
B C
D
S17
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1431
1625 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check floor wire No. 2 (side squib LH circuit).
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
S17±1 (SFL+) ±
Body groundIgnition switch ONBelow 1 V
S17±2 (SFL±) ±
Body groundIgnition switch ONBelow 1 V
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
S17±1 (SFL+) ±
S17±2 (SFL±)AlwaysBelow 1 W
S17±1 (SFL+) ±
Body groundAlways1 MW or higher
S17±2 (SFL±) ±
Body groundAlways1 MW or higher
PREPARATION:
Release the activation prevention mechanism built into con-
nector ºBº (see page DI±1137).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S17±1 (SFL+) ±
S17±2 (SFL±)Always1 MW or higher
NG Repair or replace floor wire No. 2.
OK

H01018
H10600H16839H24652
Airbag
Sensor
Assembly
DTC 56 DLC3
TC CG
Side Squib LH
C D
DI±1432
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1626 Author: Date:
2005 SEQUOIA (RM1146U)
7 Replace side airbag assembly LH (side squib LH).
PREPARATION:
(a) Replace the side airbag assembly LH (see page
RS±46, RS±61).
HINT:
Perform the inspection using parts from a normal vehicle if pos-
sible.
(b) Connect the connectors to the airbag sensor assembly.
(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 56 is not output.
HINT:
Codes other than DTC 56 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

H01017H23472
Side Squib LH
Airbag
Sensor
Assembly C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1433
1627 Author: Date:
2005 SEQUOIA (RM1146U)
8 Check airbag sensor assembly.
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 B1825 is not output.
HINT:
Codes other than DTC B1825 may be output at this time, but
they are not related to this check.
NG Replace airbag sensor assembly
(see page RS±82).
OK
Go to step 10.

H01017H44044H24015
Airbag
Sensor
Assembly Side Squib
LH
SFL+SFL± Floor Wire No. 2
C D
Service Wire
S17
DI±1434
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1628 Author: Date:
2005 SEQUOIA (RM1146U)
9 Check airbag sensor assembly.
PREPARATION:
(a) From the step 5:
Turn the ignition switch to the LOCK position.
(b) From the step 5:
Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Connect the connectors to the airbag sensor assembly.
(d) Using a service wire, connect S17±1 (SFL+) and S17±2
(SFL±) of the connector ºCº.
NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
(e) 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 B1826, B1827 or B1828 is not output.
HINT:
Codes other than DTC B1826, B1827 and B1828 may be out-
put at this time, but they are not related to this check.
NG Replace airbag sensor assembly
(see page RS±82).
OK

H01018H23474
Side Squib LH
Airbag
Sensor
Assembly C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1435
1629 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check side airbag assembly LH (side squib LH).
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) From the step 9:
Disconnect the service wire from connector ºCº.
(d) Connect the connector to the side airbag assembly LH.
(e) 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 B1825, B1826, B1827 or B1828 is not output.
HINT:
Codes other than DTC B1825, B1826, B1827 and B1828 may
be output at this time, but they are not related to this check.
NG Replace side airbag assembly LH
(see page RS±46, RS±61).
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).
HINT:

Perform the simulation method by selecting the check mode with the hand±held tester (see page
DI±1151).

After selecting the check mode, perform the simulation method by wiggling each connector of the air-
bag system or driving the vehicle on a city or rough road (see page DI±1151).

DI±1436
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1630 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1830/57 Short in Curtain Shield Airbag (RH) Squib
Circuit
DTC B1831/57 Open in Curtain Shield Airbag (RH) Squib
Circuit
DTC B1832/57 Short in Curtain Shield Airbag (RH) Squib
Circuit (to Ground)
DTC B1833/57 Short in Curtain Shield Airbag (RH) Squib
Circuit (to B+)
CIRCUIT DESCRIPTION
The curtain shield airbag RH squib circuit consists of the airbag sensor assembly and the curtain shield air-
bag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the curtain shield airbag RH squib circuit.
DTC No.DTC Detection ConditionTrouble Area
B1830/57

The airbag sensor assembly receives a line short circuit
signal 5 times in the curtain shield airbag RH squib circuit
during primary check.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly RH
(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
B1831/57

The airbag sensor assembly receives an open circuit sig-
nal in the curtain shield airbag RH squib circuit for 2 se-
conds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly RH
(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
B1832/57

The airbag sensor assembly receives a short circuit to
ground signal in the curtain shield airbag RH squib circuit
for 0.5 seconds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly RH
(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
B1833/57

The airbag sensor assembly receives a short to B+ circuit
signal in the curtain shield airbag RH squib circuit for 0.5
seconds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly RH
(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire
DIDHO±01

H01454
C12
Curtain Shield Airbag
RH SquibAirbag Sensor Assembly
A215
ICR+ Y±B
1
2Y
A216
ICR±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1437
1631 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1438
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1632 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.
CHECK:
(a) Proceed to each step according to how to read DTC.
(1) If using the hand±held tester (read the 5±digit of DTC):
Using the hand±held tester, check the DTCs (see page DI±1147).
RESULT:
DTC B1830 is output.A
DTC B1831 is output.B
DTC B1832 is output.C
DTC B1833 is output.D
(2) If not using the hand±held tester (read the 2±digit of DTC):
Check the DTCs (see page DI±1147).
RESULT:
DTC 57 is output.E
HINT:
Codes other than DTC B1830, B1831, B1832, B1833 and DTC 57 may be output at this time, but they are
not related to this check.
B Go to step 4.
C Go to step 5.
D Go to step 6.
E Go to step 7.
A