Toyota Sequoia (2005). Manual - part 391

H01003

H10600 H01075

H23352

D Squib

Spiral
Cable

Airbag

Sensor

Assembly

DTC 51

DLC3

TC

CG

F E

D C

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1359

1553

9

Replace steering wheel pad (D squib).

PREPARATION:
(a)

Replace the steering wheel pad (see page 

RS–21

).

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 51 is not output.

HINT:
Codes other than DTC 51 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

H01002

H23349

D Squib

Spiral
Cable

Airbag

Sensor

Assembly

C

D

E

F

DI–1360

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1554

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 B1800 is not output.

HINT:
Codes other than DTC B1800 may be output at this time, but
they are not related to this check.

NG

Replace airbag sensor assembly
(see page 

DI–1137

).

OK

Go to step 12.

H23975

H01002

H23988

D Squib

D+

D–

Spiral
Cable

Color: Orange

Service Wire

C

D

E

F

Airbag
Sensor 
Assembly

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1361

1555

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)

Connect the connectors to the airbag sensor assembly.

(d)

Using a service wire, connect D+ and D– of the connector
”E”.

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.

(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 B1801, B1802 or B1803 is not output.

HINT:
Codes other than DTC B1801, B1802 and B1803 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

H01003

H23354

D Squib

Spiral
Cable

Airbag

Sensor

Assembly

C

D

E

F

DI–1362

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1556

12

Check steering wheel pad (D 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 ”E”.

(d)

Connect the connectors to the steering wheel pad.

(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 B1800, B1801, B1802 or B1803 is not output.

HINT:
Codes other than DTC B1800, B1801, B1802 and B1803 may
be output at this time, but they are not related to this check.

NG

Replace 

steering wheel pad

(see page 

RS–82

).

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

).