Toyota Sequoia (2005). Manual — part 342

H02757

H10600 H40103

H23566

CG

TC

DTC B1610/13

DLC3

Front Airbag
Sensor RH

Airbag
Sensor
Assembly

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1163

1357

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.

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 B1610/13 is not output.

HINT:
Codes other than DTC B1610/13 may be output at this time, but
they are not related to this check.

NG

Go to step 2.

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

).

H03353

H08016 G27651

H23623

Front Airbag
Sensor RH

Airbag
Sensor
Assembly

+SR

–SR

A

B

D

F

E

C

C

Service Wire

+SR

–SR

A20

A12

DI–1164

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1358

2

Check connection of connectors.

PREPARATION:
(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.

CHECK:
Check that the connectors are properly connected to the airbag sensor assembly and the front airbag sensor
RH.
OK:

The connectors are connected securely.

NG

Connect connectors, then go to step 1.

OK

3

Check front airbag sensor RH circuit (open).

PREPARATION:
(a)

Disconnect the connectors from the airbag sensor as-
sembly and the front airbag sensor RH.

(b)

Using a service wire, connect A12–2 (+SR) and A12–1
(–SR) of connector ”E”.

NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

A20–29 (+SR) –

A20–27 (–SR)

Always

Below 1

Ω

NG

Go to step 8.

OK

H03355

G27651

H23624

Front Airbag
Sensor RH

Airbag
Sensor
Assembly

–SR

+SR

A

B

D

E

F

C

A20

H03355

G27651

H23624

Front Airbag
Sensor RH

Airbag
Sensor
Assembly

–SR

+SR

A

B

D

E

F

C

A20

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1165

1359

4

Check front airbag sensor RH circuit (short).

PREPARATION:
Disconnect the service wire from connector ”E”.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

A20–29 (+SR) –

A20–27 (–SR)

Always

1 M

Ω

or higher

NG

Go to step 9.

OK

5

Check front airbag sensor RH circuit (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

A20–29 (+SR) –

Body ground

Ignition switch ON

Below 1 V

A20–27 (–SR) –

Body ground

Ignition switch ON

Below 1 V

NG

Go to step 10.

OK

H03355

G27651

H23624

Front Airbag
Sensor RH

Airbag
Sensor
Assembly

–SR

+SR

A

B

D

E

F

C

A20

DI–1166

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1360

6

Check front airbag sensor RH circuit (short to ground).

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 Connection

Condition

Specified Condition

A20–29 (+SR) –

Body ground

Always

1 M

Ω

or higher

A20–27 (–SR) –

Body ground

Always

1 M

Ω

or higher

NG

Go to step 11.

OK