Toyota Sequoia (2005). Manual - part 360

H01015

G27651

H23985

Cowl Wire

Airbag 
Sensor 
Assembly

Integration
Control and Panel

A

B

C

D

P–AB

PAON

A20

H23951

P–AB

PAON

A20

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1235

1429

10

Check cowl wire (short to B+).

PREPARATION:
(a)

Disconnect the service wire from connector ”C”.

(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

A20–17 (P–AB) – 

Body ground

Ignition switch ON

Below 1 V

A20–23 (PAON) – 

Body ground

Ignition switch ON

Below 1 V

NG

Repair or replace cowl wire.

OK

11

Check cowl wire (airbag sensor assembly – body 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

A20–17 (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

H24027

PAON

I19

P–AB

Integration Control and Panel:

H24023

DI–1236

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1430

12

Check integration control and panel (passenger airbag ON/OFF indicator).

PREPARATION:
(a)

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

(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)

Check that the passenger airbag ON/OFF indicator
condition in the table below.

OK:

Tester Connection

Condition

Indicator

I19–16 (PAON) – 

Body ground

Ignition switch ON

ON indicator comes on

I19–17 (P–AB) – 

Body ground

Ignition switch ON

OFF indicator comes on

NG

Replace integration control and panel
(see page 

BO–89

).

OK

H10600

H01012

H01069

H24008

Airbag 
Sensor 
Assembly

Integration
Control
and Panel

DLC3

TC

CG

DTC B1660/43

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

DI–1237

1431

13

Check airbag sensor assembly.

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)

Connect the connectors to the airbag sensor assembly.

(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, 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 airbag sensor assembly
(see page 

RS–82

).

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

).

DI–1238

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM

1432

DTC

B1661/44 Roll Over Cut Off Indicator Malfunction

CIRCUIT DESCRIPTION

The RSCA OFF switch is a mechanism that operates both right and left side of the curtain shield airbag as-
sembly and the seat belt pretensioners when the airbag sensor assembly detects a roll–over.
The RSCA OFF indictor is installed in the combination meter.
As operating the RSCA OFF switch, the indicator comes on to inform the driver that the roll–over detection
system is not working.
The initial setting of the roll–over detection system is on. It automatically operates every time the ignition
switch is turned on.

DTC No.

DTC Detecting Condition

Trouble Area

B1661/44

The airbag sensor assembly receives an open circuit sig-

nal, a short circuit to ground signal or a short circuit to B+

signal in the roll over cut off indicator circuit for 2 seconds.

RSCA OFF indicator malfunction

Airbag sensor assembly malfunction

Combination meter (RSCA OFF indicator)

Airbag sensor assembly

Cowl wire

DIDH2–01