Page 1617 of 4323

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).
Page 1618 of 4323

DI±1416
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1610 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1820/55 Short in Side Squib (RH) Circuit
DTC B1821/55 Open in Side Squib (RH) Circuit
DTC B1822/55 Short in Side Squib (RH) Circuit (to Ground)
DTC B1823/55 Short in Side Squib (RH) Circuit (to B+)
CIRCUIT DESCRIPTION
The side squib RH circuit consists of the airbag sensor assembly and the side airbag 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 side squib RH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1820/55
The airbag sensor assembly receives a line short circuit
signal 5 times in the side squib RH circuit during primary
check.
Side squib RH malfunction
Airbag sensor assembly malfunction
Side airbag assembly RH (Side squib RH)
Airbag sensor assembly
Floor wire
B1821/55
The airbag sensor assembly receives an open circuit sig-
nal in the side squib RH circuit for 2 seconds.
Side squib RH malfunction
Airbag sensor assembly malfunctionSide airbag assembly RH (Side squib RH)
Airbag sensor assembly
Floor wire
B1822/55
The airbag sensor assembly receives a short circuit to
ground signal in the side squib RH circuit for 0.5 seconds.
Side squib RH malfunction
Airbag sensor assembly malfunctionSide airbag assembly RH (Side squib RH)
Airbag sensor assembly
Floor wire
B1823/55
The airbag sensor assembly receives a short to B+ circuit
signal in the side squib RH circuit for 0.5 seconds.
Side squib RH malfunction
Airbag sensor assembly malfunctionSide airbag assembly RH (Side squib RH)
Airbag sensor assembly
Floor wire
DIDHM±01
Page 1619 of 4323
H01454
S18
Side Squib RHAirbag Sensor Assembly
A218
SFR+ Y±B
1
2Y
A217
SFR±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1417
1611 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1620 of 4323

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
Page 1621 of 4323
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.
Page 1622 of 4323

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.
Page 1623 of 4323

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
Page 1624 of 4323

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