Toyota Sequoia (2005). Manual - part 397

H01024

H23360

P Squib

Airbag
Sensor
Assembly

C

D

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1383

1577

10

Check front passenger airbag assembly (P 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 9:
Disconnect the SST from connector ”C”.

(d)

Connect the connector to the front passenger airbag as-
sembly.

(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 B1805, B1806, B1807 or B1808 is not output.

HINT:
Codes other than DTC B1805, B1806, B1807 and B1808 may
be output at this time, but they are not related to this check.

NG 

Replace front passenger airbag assembly
(see page 

DI–1137

).

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–1384

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1578

DTC

B1810/53 Short in D Squib (Dual stage – 2nd step) 

Circuit

DTC

B1811/53 Open in D Squib (Dual stage – 2nd step) 

Circuit

DTC

B1812/53 Short in D Squib (Dual stage – 2nd step) 

Circuit (to Ground)

DTC

B1813/53 Short in D Squib (Dual stage – 2nd step) 

Circuit (to B+)

CIRCUIT DESCRIPTION

The D squib (Dual stage – 2nd step) circuit consists of the airbag sensor assembly, the spiral cable and the
steering wheel pad.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the D squib (Dual stage – 2nd step) circuit.

DTC No.

DTC Detection Condition

Trouble Area

B1810/53

The airbag sensor assembly receives a line short circuit

signal 5 times in the D squib (Dual stage – 2nd step) cir-

cuit during primary check.

Spiral cable malfunction

D squib malfunction

Airbag sensor assembly malfunction

Steering wheel pad (D squib, Dual stage – 2nd step)

Airbag sensor assembly

Spiral cable

Cowl wire

B1811/53

The airbag sensor assembly receives an open circuit sig-

nal in the D squib (Dual stage – 2nd step) circuit for 2 se-

conds.

Spiral cable malfunction

D squib malfunction

Airbag sensor assembly malfunction

Steering wheel pad (D squib, Dual stage – 2nd step)

Airbag sensor assembly

Spiral cable

Cowl wire

B1812/53

The airbag sensor assembly receives a short circuit to

ground signal in the D squib (Dual stage – 2nd step) cir-

cuit for 0.5 seconds.

Spiral cable malfunction

D squib malfunction

Airbag sensor assembly malfunction

Steering wheel pad (D squib, Dual stage – 2nd step)

Airbag sensor assembly

Spiral cable

Cowl wire

B1813/53

The airbag sensor assembly receives a short to B+  circuit

signal in the D squib (Dual stage – 2nd step) circuit for 0.5

seconds.

Spiral cable malfunction

D squib malfunction

Airbag sensor assembly malfunction

Steering wheel pad (D squib, Dual stage – 2nd step)

Airbag sensor assembly

Spiral cable

Cowl wire

DIDHK–01

H01451

Airbag Sensor Assembly

A20

8

D2+

Y–R

D Squib

A23
Spiral Cable

A20

7

D2–

Y–G

4

3

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1385

1579

WIRING DIAGRAM

DI–1386

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1580

INSPECTION PROCEDURE

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 B1810 is output.

A

DTC B1811 is output.

B

DTC B1812 is output.

C

DTC B1813 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 53 is output.

E

HINT:
Codes other than DTC B1810, B1811, B1812, B1813 and DTC 53 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