Toyota Sequoia (2005). Manual - part 349

C84216

H10600

H43425

C91342

H23573

Side Airbag
Sensor Assembly RH

Airbag 
Sensor 
Assembly

DTC B1620/21

DTC B1625/22

CG

TC

DLC3

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1191

1385

7

Check side airbag sensor assembly LH.

PREPARATION:
(a)

Connect the connectors to the airbag sensor assembly.

(b)

Interchange the side airbag sensor assembly RH with LH
and connect 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 B1625/22 is output.

A

DTC B1620/21 is output.

B

DTC B1620/21 and B1625/22 are not

output.

C

HINT:
Codes other than DTC B1620/21 and B1625/22 may be output
at this time, but they are not related to this check.

A

Replace airbag sensor assembly
(see page 

RS–82

).

B

Replace side airbag sensor assembly LH
(see page 

RS–92

).

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

).

H02751

Airbag Sensor Assembly

S27
Curtain Shield Airbag
Sensor Assembly RH

A21

21

W

2

A21

19

B

1

VUCR

ESCR

VUCR

ESCR

DI–1192

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1386

DTC

B1630/23 Curtain Shield Airbag Sensor (RH) 

Malfunction

CIRCUIT DESCRIPTION

The curtain shield airbag sensor assembly RH consists of the safing sensor the diagnostic circuit, the lateral
deceleration sensor, etc.
If the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1630/23 is recorded when a malfunction is detected in the curtain shield airbag sensor RH circuit.

DTC No.

DTC Detection Condition

Trouble Area

B1630/23

The airbag sensor assembly receives a short circuit sig-

nal, an open circuit signal, a short circuit to ground signal

or a short circuit to B+ signal in the curtain shield airbag

sensor RH circuit for 2 seconds.

Curtain shield airbag sensor assembly RH malfunction

Airbag sensor assembly malfunction

Curtain shield airbag sensor assembly RH

Airbag sensor assembly

Floor wire

WIRING DIAGRAM

DIDGW–01

H10600

H01012

H24646

H24648

CG

TC

DTC B1630/23

DLC3

Airbag 

Sensor 

Assembly

Curtain Shield
Airbag Sensor 
Assembly RH

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1193

1387

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 horn button assembly.

(e)

Disconnect the connectors from the front passenger airbag assembly.

(f)

w/ Side and curtain shield airbag:
Disconnect the connectors from the front seat 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 assembly 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 B1630/23 is not output.

HINT:
Codes other than DTC B1630/23 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

).

H01015

C91384 G27650

H23090

Floor Wire

Airbag 

Sensor 

Assembly

Curtain Shield
Airbag Sensor 
Assembly RH

VUCR

ESCR

SST

A

B

C

D

A21

VUCR

ESCR

S27

DI–1194

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1388

2

Check connections 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 curtain shield air-
bag sensor assembly RH.
OK:

The connectors are connected securely.

NG

Connect connectors, then go to step 1.

OK

3

Check floor wire (open).

PREPARATION:
(a)

Disconnect the connectors from the airbag sensor as-
sembly and the curtain shield airbag sensor assembly
RH.

(b)

Using SST, connect S27–2 (VUCR) and S27–1 (ESCR)
of connector ”C”.
SST

SST 09843–18040

CHECK:
Measure the resistance according to the value(s) in the table
below.

Tester Connection

Condition

Specified Condition

A21–21 (VUCR) – 

A21–19 (ESCR)

Always

Below 1 

Ω

NG

Repair or replace floor wire.

OK