Toyota Sequoia (2005). Manual - part 412

H01021

H10600 H16840

H24653

Airbag 
Sensor 
Assembly

CG

TC

C

D

DLC3

DTC 57

Curtain Shield 
Airbag RH Squib

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1443

1637

9

Replace curtain shield airbag assembly RH (curtain shield airbag RH squib).

PREPARATION:
(a)

Replace the curtain shield airbag assembly RH (see page

RS–71

).

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 57 is not output.

HINT:
Codes other than DTC 57 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

H01017

H23588

Airbag 
Sensor 
Assembly

C

D

Curtain Shield 
Airbag RH Squib

DI–1444

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1638

10

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 B1830 is not output.

HINT:
Codes other than DTC B1830 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 12.

H01020

H23982

H24010

Airbag 
Sensor 
Assembly

ICR+

ICR–

C

D

Service Wire

Curtain Shield 
Airbag RH Squib

C12

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1445

1639

11

Check airbag sensor assembly.

PREPARATION:
(a)

From the step 6:
Turn the ignition switch to the LOCK position.

(b)

From the step 6:
Disconnect the negative (–) terminal cable from the bat-
tery, and wait for at least 90 seconds.

(c)

Using a service wire, connect C12–1 (ICR+) and C12–2
(ICR–) of the connector ”C”.

NOTICE:

Twist the end of the service wire in order to insert it
into the connector.

Do not forcibly insert the twisted service wire into the
terminals of the connector when connecting.

(d)

Connect the connectors to the airbag sensor assembly.

(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 B1831, B1832 or B1833 is not output.

HINT:
Codes other than DTC B1831, B1832 and B1833 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

Airbag 
Sensor 
Assembly

C

D

Curtain Shield 
Airbag RH Squib

DI–1446

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1640

12

Check curtain shield airbag assembly RH (curtain shield airbag RH squib).

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 11:
Disconnect the service wire from connector ”C”.

(d)

Connect the connector to the curtain shield airbag as-
sembly 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 B1830, B1831, B1832 or B1833 is not output.

HINT:
Codes other than DTC B1830, B1831, B1832 and B1833 may
be output at this time, but they are not related to this check.

NG 

Replace curtain shield airbag assembly RH
(see page 

RS–71

).

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

).