TOYOTA SEQUOIA 2001 Service Repair Manual

H23635
P2±
P2+ P Squib
(Dual stage ±
2nd step)
A
B C D
A22
Cowl Wire
Airbag
Sensor
Assembly
H23635
P2±
P2+ P Squib
(Dual stage ±
2nd step)
A
B C D
A22
Cowl Wire
Airbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1409
1603 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check cowl 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
A22±3 (P2+) ±
A22±4 (P2±)Always1 MW or higher
NG Repair or replace cowl wire.
OK
Go to step 8.
3 Check cowl wire (open).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A22±3 (P2+) ±
A22±4 (P2±)AlwaysBelow 1 W
NG Repair or replace cowl wire.
OK
Go to step 9.

H23635
P2±
P2+ P Squib
(Dual stage ±
2nd step)
A
B C D
A22
Cowl Wire
Airbag
Sensor
Assembly
H23635
P2±
P2+ P Squib
(Dual stage ±
2nd step)
A
B C D
A22
Cowl Wire
Airbag
Sensor
Assembly
DI±1410
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1604 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check cowl wire (short to ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A22±3 (P2+) ±
Body groundAlways1 MW or higher
A22±4 (P2±) ±
Body groundAlways1 MW or higher
NG Repair or replace cowl wire.
OK
Go to step 9.
5 Check cowl 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
A22±3 (P2+) ±
Body groundIgnition switch ONBelow 1 V
A22±4 (P2±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace cowl wire.
OK
Go to step 9.

H23635
P2±
P2+ P Squib
(Dual stage ±
2nd step)
A
B C D
A22
Cowl Wire
Airbag
Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1411
1605 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check cowl wire (P squib circuit, dual stage ± 2nd step).
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
A22±3 (P2+) ±
Body groundIgnition switch ONBelow 1 V
A22±4 (P2±) ±
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
A22±3 (P2+) ±
A22±4 (P2±)AlwaysBelow 1 W
A22±3 (P2+) ±
Body groundAlways1 MW or higher
A22±4 (P2±) ±
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
A22±3 (P2+) ±
A22±4 (P2±)Always1 MW or higher
NG Repair or replace cowl wire.
OK

H10600H01024H01078H23362
Airbag
Sensor
Assembly
DTC 54 DLC3
TC CG
P Squib
(Dual stage ±
2nd step)
DC
DI±1412
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1606 Author: Date:
2005 SEQUOIA (RM1146U)
7 Replace front passenger airbag assembly (P squib, dual stage ± 2nd step).
PREPARATION:
(a) Replace the front passenger airbag assembly (see page
RS±33).
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 54 is not output.
HINT:
Codes other than DTC 54 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

H01023H23358
Airbag
Sensor
Assembly P Squib
(Dual stage ±
2nd step)
C D
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1413
1607 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 B1815 is not output.
HINT:
Codes other than DTC B1815 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.

H23802H01023H23991
P2+ P2±Airbag
Sensor
Assembly P Squib
(Dual stage ±
2nd step)
DC
SST
Cowl Wire
DI±1414
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1608 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 SST, connect A22±3 (P2+) and A22±4 (P2±) of
connector ºCº.
SST 09843±18040
(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 B1816, B1817 or B1818 is not output.
HINT:
Codes other than DTC B1816, B1817 and B1818 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

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±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 malfunction
Side 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 malfunction
Side 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 malfunction
Side airbag assembly RH (Side squib RH)

Airbag sensor assembly

Floor wire
DIDHM±01

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

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