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DI-421
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI1BG-34
DTC B0131/64 Open in P/T Squib (RH) Circuit
CIRCUIT DESCRIPTION
The P/T squib circuit (RH) consists of the airbag sensor assembly and seat belt pretensioner (RH).
It causes the seat belt pretensioner (RH) to activate when the seat belt pretensioner (RH) activation condi-
tions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0131/64 is recorded when an open is detected in the P/T squib (RH) circuit.
DTC No. DTC Detecting Condition Trouble Area
S Open circuit in PR+ wire harness or PR- wire harness of
S Seat belt pretensioner (RH)
squib
B0131/64 S Airbag sensor assembly
S P/T squib (RH) malfunction
S Wire harness
S Airbag sensor assembly malfunction
WIRING DIAGRAM
See page DI-417 .
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check P/T squib (RH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
Airbag
Sensor
the seat belt pretensioner (RH) and the airbag sensor assem-
P/T Squib (RH)
Assembly bly, measure the resistance between PR+ and PR-.
OK:
Resistance: Below 1
PR+ PR-
NG Repair or replace harness or connector be-
tween seat belt pretensioner (RH) and airbag
H01019 (+) (-) H02205 sensor assembly.
H02141
OK
2002 4RUNNER (RM887U)
Author : Date : 597
DI-422
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
Airbag (b) Using a service wire, connect PR+ and PR- of the con-
P/T Squib (RH) Sensor nector (on the seat belt pretensioner side) between the
Assembly
seat belt pretensioner (RH) and the airbag sensor assem-
bly.
(c) Connect negative (-) terminal cable to the battery, and
ACC ON wait at least for 2 seconds.
PR+ PR-
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least for 20
or
seconds.
(b) Clear DTC stored in memory.
(See page DI-377 )
DLC1 DTC B0131/64 (c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
E1 seconds.
H01020
Tc (e) Check DTC.
H02139
AB0118 AB0119 (See page DI-377 )
R13006 H01083 H02206
OK:
DTC B0131/64 is not output.
HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 598
DI-423
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check P/T squib (RH).
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (-) terminal cable from the battery,
Airbag
Sensor
and wait at least for 90 seconds.
P/T Squib (RH)
Assembly (c) Connect the seat belt pretensioner (RH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
ACC ON (a) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
or
(See page DI-377 )
DLC1 (c) Turn ignition switch to LOCK, and wait at least for 20 se-
DTC B0131/64
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
E1 Tc (e) Check DTC.
H01021
(See page DI-377 )
AB0118 AB0119
R13006 H01083 H01217 OK:
DTC B0131/64 is not output.
HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (RH).
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.
2002 4RUNNER (RM887U)
Author : Date : 599
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