Toyota Sequoia (2005). Manual - part 359

H01015

G27651

H23985

Cowl Wire

Airbag 
Sensor 
Assembly

Integration
Control and Panel

A

B

C

D

P–AB

PAON

A20

H01015

G27651

H23985

Cowl Wire

Airbag 
Sensor 
Assembly

Integration
Control and Panel

A

B

C

D

P–AB

PAON

A20

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1231

1425

4

Check cowl wire (short to ground).

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

Tester Connection

Condition

Specified Condition

A20–17 (P–AB) – 

Body ground

Always

1 M

Ω

 or higher

A20–23 (PAON) – 

Body ground

Always

1 M

Ω

 or higher

NG

Repair or replace cowl wire.

OK

5

Check cowl wire (short).

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

Tester Connection

Condition

Specified Condition

A20–17 (P–AB) – 

A20–23 (PAON)

Always

1 M

Ω

 or higher

NG

Repair or replace cowl wire.

OK

H10600

H01012

H01069

H24008

Airbag 
Sensor 
Assembly

Integration
Control
and Panel

DLC3

TC

CG

DTC B1660/43

DI–1232

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1426

6

Check integration control and panel.

PREPARATION:
(a)

Connect the connectors to the airbag sensor assembly.

(b)

Connect the connector to the integration control and pan-
el.

(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 B1660/43 is not output.

HINT:
Codes other than DTC B1660/43 may be output at this time, but
they are not related to this check.

NG

Replace integration control and panel
(see page 

BO–89

).

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

).

H24027

Integration Control and Panel:

IG+

I19

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1233

1427

7

Prepare for inspection.

PREPARATION:
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.

(g)

w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH.

(h)

Disconnect the connectors from the front seat outer belt LH.

NEXT

8

Check cowl wire (source voltage).

PREPARATION:
(a)

Disconnect the connector from the integration control and
panel.

(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.

(b)

Measure the voltage according to the value(s) in the table
below.

OK:

Tester Connection

Condition

Specified Condition

I19–2 (IG+) – 

Body ground

Ignition switch ON

10 to 14 V

NG

Repair or replace cowl wire (integration control
and panel – battery).

OK

H01010

H23951

H24028

H24556

Cowl Wire

Airbag 

Sensor 

Assembly

Integration Control
and Panel

A

B

C

D

P–AB

PAON

P–AB

PAON

Service Wire

A20

I19

DI–1234

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1428

9

Check cowl wire (open).

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)

Using a service wire, connect I19–17 (P–AB) and I19–16
(PAON) of connector ”C”.

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

A20–17 (P–AB) – 

A20–23 (PAON)

Always

Below 1 

Ω

NG

Repair or replace cowl wire.

OK