2001 TOYOTA SEQUOIA side step

DI±1408
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1602 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 B1815 is output.A
DTC B1816 is output.B
DTC B1817 is output.C
DTC B1818 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 54 is output.E
HINT:
Codes other than DTC B1815, B1816, B1817, B1818 and DTC 54 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

H01024H23360
Airbag
Sensor
Assembly P Squib
(Dual stage ±
2nd step)
DC
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1415
1609 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check front passenger airbag assembly (P squib, dual stage ± 2nd step).
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 SST from connector ºCº.
(d) Connect the connector to the front passenger airbag as-
sembly.
(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 B1815, B1816, B1817 or B1818 is not output.
HINT:
Codes other than DTC B1815, B1816, B1817 and B1818 may
be output at this time, but they are not related to this check.
NG Replace front passenger airbag assembly
(see page RS±33).
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±1418
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1612 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 B1820 is output.A
DTC B1821 is output.B
DTC B1822 is output.C
DTC B1823 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 55 is output.E
HINT:
Codes other than DTC B1820, B1821, B1822, B1823 and DTC 55 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

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.

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).