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
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
(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)
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
).
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–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
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