TOYOTA SEQUOIA 2001 Service Repair Manual

H01019H44043H24016
Side Squib RHAirbag
Sensor
Assembly
SFR+ SFR±Floor Wire
A
B C
D
S18
H01019H44043H24016
Side Squib RHAirbag
Sensor
Assembly
SFR+ SFR±Floor Wire
A
B C
D
S18
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1419
1613 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check floor wire (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
S18±1 (SFR+) ±
S18±2 (SFR±)Always1 MW or higher
NG Repair or replace floor wire.
OK
Go to step 8.
3 Check floor wire (open).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S18±1 (SFR+) ±
S18±2 (SFR±)AlwaysBelow 1 W
NG Repair or replace floor wire.
OK
Go to step 9.

H01019H44043H24016
Side Squib RHAirbag
Sensor
Assembly
SFR+ SFR±Floor Wire
A
B C
D
S18
H01019H44043H24016
Side Squib RHAirbag
Sensor
Assembly
SFR+ SFR±Floor Wire
A
B C
D
S18
DI±1420
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1614 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check floor wire (short to ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
S18±1 (SFR+) ±
Body groundAlways1 MW or higher
S18±2 (SFR±) ±
Body groundAlways1 MW or higher
NG Repair or replace floor wire.
OK
Go to step 9.
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
S18±1 (SFR+) ±
Body groundIgnition switch ONBelow 1 V
S18±2 (SFR±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace floor wire.
OK
Go to step 9.

H01019H44043H24016
Side Squib RHAirbag
Sensor
Assembly
SFR+ SFR±Floor Wire
A
B C
D
S18
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1421
1615 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check floor wire (side squib RH 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
S18±1 (SFR+) ±
Body groundIgnition switch ONBelow 1 V
S18±2 (SFR±) ±
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
S18±1 (SFR+) ±
S18±2 (SFR±)AlwaysBelow 1 W
S18±1 (SFR+) ±
Body groundAlways1 MW or higher
S18±2 (SFR±) ±
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
S18±1 (SFR+) ±
S18±2 (SFR±)Always1 MW or higher
NG Repair or replace floor wire.
OK

H01021
H10600H16838H24651
DTC 55 DLC3
TC CG
Side Squib RH
C DAirbag
Sensor
Assembly
DI±1422
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1616 Author: Date:
2005 SEQUOIA (RM1146U)
7 Replace side airbag assembly RH (side squib RH).
PREPARATION:
(a) Replace the side airbag assembly RH (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 55 is not output.
HINT:
Codes other than DTC 55 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

H01017H23588
Side Squib RHAirbag
Sensor
Assembly
C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1423
1617 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 B1820 is not output.
HINT:
Codes other than DTC B1820 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.

H44044H01020H24018
Airbag
Sensor
Assembly Side Squib RH
SFR+ SFR±Floor Wire
D
Service Wire C
S18
DI±1424
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1618 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 S18±1 (SFR+) and S18±2
(SFR±) 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 B1821, B1822 or B1823 is not output.
HINT:
Codes other than DTC B1821, B1822 and B1823 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

H23966
Side Squib RH
Airbag
Sensor
Assembly C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1425
1619 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check side airbag assembly RH (side squib RH).
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 RH.
(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 B1820, B1821, B1822 or B1823 is not output.
HINT:
Codes other than DTC B1820, B1821, B1822 and B1823 may
be output at this time, but they are not related to this check.
NG Replace side airbag assembly RH
(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±1426
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1620 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1825/56 Short in Side Squib (LH) Circuit
DTC B1826/56 Open in Side Squib (LH) Circuit
DTC B1827/56 Short in Side Squib (LH) Circuit (to Ground)
DTC B1828/56 Short in Side Squib (LH) Circuit (to B+)
CIRCUIT DESCRIPTION
The side squib LH circuit consists of the airbag sensor assembly and the side airbag assembly LH.
This circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the side squib LH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1825/56

The airbag sensor assembly receives a line short circuit
signal 5 times in the side squib LH circuit during primary
check.

Side squib LH malfunction

Airbag sensor assembly malfunction

Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
B1826/56

The airbag sensor assembly receives an open circuit sig-
nal in the side squib LH circuit for 2 seconds.

Side squib LH malfunction

Airbag sensor assembly malfunction
Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
B1827/56

The airbag sensor assembly receives a short circuit to
ground signal in the side squib LH circuit for 0.5 seconds.

Side squib LH malfunction

Airbag sensor assembly malfunction
Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
B1828/56

The airbag sensor assembly receives a short to B+ circuit
signal in the side squib LH circuit for 0.5 seconds.

Side squib LH malfunction

Airbag sensor assembly malfunction
Side airbag assembly LH (Side squib LH)

Airbag sensor assembly

Floor wire No. 2
DIDHN±01

H01454
S17
Side Squib LHAirbag Sensor Assembly
A191
SFL+ Y±B
1
2Y
A192
SFL±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1427
1621 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

DI±1428
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1622 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 B1825 is output.A
DTC B1826 is output.B
DTC B1827 is output.C
DTC B1828 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 56 is output.E
HINT:
Codes other than DTC B1825, B1826, B1827, B1828 and DTC 56 may be output at this time, but they are
not related to this check.
B Go to step 3.
C Go to step 4.
D Go to step 5.
E Go to step 6.
A