Toyota Sequoia (2005). Manual - part 410

H01018

H23474

Side Squib LH

Airbag 
Sensor 
Assembly

C

D

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1435

1629

10

Check side airbag assembly LH (side squib LH).

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 9:
Disconnect the service wire from connector ”C”.

(d)

Connect the connector to the side airbag assembly LH.

(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 B1825, B1826, B1827 or B1828 is not output.

HINT:
Codes other than DTC B1825, B1826, B1827 and B1828 may
be output at this time, but they are not related to this check.

NG 

Replace side airbag assembly LH
(see page 

RS–46

, 

RS–61

).

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

).

DI–1436

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1630

DTC

B1830/57 Short in Curtain Shield Airbag (RH) Squib

Circuit

DTC

B1831/57 Open in Curtain Shield Airbag (RH) Squib

Circuit

DTC

B1832/57 Short in Curtain Shield Airbag (RH) Squib

Circuit (to Ground)

DTC

B1833/57 Short in Curtain Shield Airbag (RH) Squib

Circuit (to B+)

CIRCUIT DESCRIPTION

The curtain shield airbag RH squib circuit consists of the airbag sensor assembly and the curtain shield air-
bag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the curtain shield airbag RH squib circuit.

DTC No.

DTC Detection Condition

Trouble Area

B1830/57

The airbag sensor assembly receives a line short circuit

signal 5 times in the curtain shield airbag RH squib circuit

during primary check.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction

Curtain shield airbag assembly RH 

(Curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire

B1831/57

The airbag sensor assembly receives an open circuit sig-

nal in the curtain shield airbag RH squib circuit for 2 se-

conds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction

Curtain shield airbag assembly RH

(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire

B1832/57

The airbag sensor assembly receives a short circuit to

ground signal in the curtain shield airbag RH squib circuit

for 0.5 seconds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction

Curtain shield airbag assembly RH

(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire

B1833/57

The airbag sensor assembly receives a short to B+ circuit

signal in the curtain shield airbag RH squib circuit for 0.5

seconds.

Curtain shield airbag RH squib malfunction

Airbag sensor assembly malfunction

Curtain shield airbag assembly RH

(curtain shield airbag RH squib)

Airbag sensor assembly

Floor wire

DIDHO–01

H01454

C12
Curtain Shield Airbag
RH Squib

Airbag Sensor Assembly

A21

5

ICR+

Y–B

1

2

Y

A21

6

ICR–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1437

1631

WIRING DIAGRAM

DI–1438

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1632

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.

CHECK:
(a)

Proceed to each step according to how to read DTC.
(1)

If using the hand–held tester (read the 5–digit of DTC):
Using the hand–held tester, check the DTCs (see page 

DI–1147

).

RESULT:

DTC B1830 is output.

A

DTC B1831 is output.

B

DTC B1832 is output.

C

DTC B1833 is output.

D

(2)

If not using the hand–held tester (read the 2–digit of DTC):
Check the DTCs (see page 

DI–1147

).

RESULT:

DTC 57 is output.

E

HINT:
Codes other than DTC B1830, B1831, B1832, B1833 and DTC 57 may be output at this time, but they are
not related to this check.

B

Go to step 4.

C

Go to step 5.

D

Go to step 6.

E

Go to step 7.

A