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DI-434
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI16W-44
DTC B0135/73 Short in P/T Squib (LH) Circuit
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (LH).
It causes the seat belt pretensioner (LH) to activate when the seat belt pretensioner (LH) activation condi-
tions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0135/73 is recorded when a short is detected in the P/T squib (LH) circuit.
DTC No. DTC Detecting Condition Trouble Area
S Short circuit between PL+ wire harness and PL- wire har-
S Seat belt pretensioner (LH)
ness of squib
B0135/73 S Airbag sensor assembly
S P/T squib (LH) malfunction
S Wire harness
S Airbag sensor assembly malfunction
WIRING DIAGRAM
Airbag Sensor Assembly
P27
P/T Squib (LH)
2
1 Y-B
C20 PL+
2 1
Y
C20 PL-
H01454
2002 4RUNNER (RM887U)
Author : Date : 610
DI-435
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check P/T squib (LH) circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
Airbag
connector (on the airbag sensor assembly side) between the
P/T Squib (LH) Sensor
Assembly airbag sensor assembly and the seat belt pretensioner (LH).
(See page DI-377 )
CHECK:
For the connector (on the seat belt pretensioner side) between
PL+ PL- the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and PL-.
OK:
Resistance: 1 M or Higher
H01016 (+) (-)
H02141 H02211
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 611
DI-436
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
P/T Squib (LH) PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
Airbag (b) Connect negative (-) terminal cable to the battery, and
Sensor wait at least for 2 seconds.
Assembly CHECK:
(a) Turn ignition switch to ACC or ON and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
ACC ON (See page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
or conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
DLC1 seconds.
DTC B0135/73 (e) Check DTC.
(See page DI-377 )
OK:
DTC B0135/73 is not output.
E1
Tc HINT:
H01017
AB0118 AB0119 Codes other than code B0135/73 may be output at this time, but
R13006 H01086 H07487
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 612
DI-437
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check P/T squib (LH).
PREPARATION:
(a) Turn ignition switch to LOCK.
Airbag (b) Disconnect negative (-) terminal cable from the battery,
P/T Squib (LH) Sensor and wait at least for 90 seconds.
Assembly
(c) Connect the seat belt pretensioner (LH) connector.
(d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
ACC ON CHECK:
(a) Turn ignition switch to LOOK, and wait at least for 20 se-
cond.
or
(b) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
DLC1 (c) Clear DTC stored in memory.
DTC B0135/73
(See page DI-377 )
(d) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
E1 Tc (e) Turn ignition switch to ACC or ON, and wait at least for 20
H01018 seconds.
AB0118 AB0119
R13006 H01086 H01229 (f) Check DTC.
(See page DI-377 )
OK:
DTC B0135/73 is not output.
HINT:
Codes other than code B0135/73 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (LH).
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 : 613
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