Toyota Sequoia (2005). Manual - part 345

H03355

G27651

H23624

Front Airbag
Sensor LH

Airbag
Sensor
Assembly

–SL

+SL

A

B

D

E

F

C

A20

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1175

1369

6

Check front airbag sensor LH 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

A20–30 (+SL) – 

Body ground

Always

1 M

Ω

 or higher

A20–28 (–SL) – 

Body ground

Always

1 M

Ω

 or higher

NG

Go to step 11.

OK

H02757

H10600

H40103

W02044

H23363

DTC B1610/13

DLC3

TC

CG

Airbag
Sensor
Assembly

Front Airbag 
Sensor RH

DTC B1615/14

DC

DI–1176

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1370

7

Check front airbag sensor LH.

PREPARATION:
(a)

Connect the connectors to the airbag sensor assembly.

(b)

Interchange the front airbag sensor RH with LH and con-
nect the connectors to them.

(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 B1615/14 is output.

A

DTC B1610/13 is output.

B

DTC B1610/13 and B1615/14 are not

output.

C

HINT:
Codes other than DTC B1610/13 and B1615/14 may be output
at this time, but they are not related to this check.

A

Replace airbag sensor assembly
(see page 

RS–84

).

B

Replace front airbag sensor LH
(see page 

RS–89

).

C

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

).

H23631

H03352

H23983

H24011

Airbag 
Sensor 
Assembly

Front Airbag 
Sensor LH

Engine Room Main Wire

A

B

C

D

E

F

Service Wire

Cowl Wire

+SL

–SL

A11

IA3

+SL

–SL

H03354

H23983

H24012

Airbag 
Sensor 
Assembly

+SL

–SL

A

B

D

E

C

F

Front Airbag 
Sensor LH

Cowl Wire

Engine Room Main Wire

IA3

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1177

1371

8

Check engine room main wire (open).

PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
HINT:
The service wire has already been inserted into connector ”E”.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

IA3–1 (+SL) – 

IA3–2 (–SL)

Always

Below 1 

Ω

NG

Repair or replace engine room main wire.

OK

Repair or replace cowl wire.

9

Check engine room main wire (short).

PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection

Condition

Specified Condition

IA3–1 (+SL) – 

IA3–2 (–SL)

Always

1 M

Ω

 or higher

NG

Repair or replace engine room main wire.

OK

Repair or replace cowl wire.

H03354

H23983

H24012

Airbag 
Sensor 
Assembly

+SL

–SL

A

B

D

E

C

F

Front Airbag 
Sensor LH

Cowl Wire

Engine Room Main Wire

IA3

DI–1178

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1372

10

Check engine room main wire (short to B+).

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)

Disconnect the engine room main wire connector from the
cowl wire.

(d)

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

IA3–1 (+SL) – 

Body ground

Ignition switch ON

Below 1 V

IA3–2 (–SL) – 

Body ground

Ignition switch ON

Below 1 V

NG

Repair or replace engine room main wire.

OK

Repair or replace cowl wire.