Toyota Sequoia (2005). Manual — part 403
H01454
Airbag Sensor Assembly
A20 P2+
1
Y–R
A22
P Squib
A20 P2–
2
Y–G
3
4
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1407
1601
WIRING DIAGRAM
DI–1408
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1602
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
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
).
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
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
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1409
1603
2
Check cowl wire (short).
PREPARATION:
Release the activation prevention mechanism built into con-
nector ”B” (see page
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Condition
Specified Condition
A22–3 (P2+) –
A22–4 (P2–)
Always
1 M
Ω
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 Connection
Condition
Specified Condition
A22–3 (P2+) –
A22–4 (P2–)
Always
Below 1
Ω
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
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1604
4
Check cowl wire (short to ground).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Condition
Specified Condition
A22–3 (P2+) –
Body ground
Always
1 M
Ω
or higher
A22–4 (P2–) –
Body ground
Always
1 M
Ω
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 Connection
Condition
Specified Condition
A22–3 (P2+) –
Body ground
Ignition switch ON
Below 1 V
A22–4 (P2–) –
Body ground
Ignition switch ON
Below 1 V
NG
Repair or replace cowl wire.
OK
Go to step 9.
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