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DI-410
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI1B6-36
DTC B0105/53 Short in P Squib Circuit
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passenger airbag assembly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0105/53 is recorded when a short is detected in the P squib circuit.
DTC No. DTC Detecting Condition Trouble Area
S Short circuit in P squib wire harness S Front passenger airbag assembly (P squib)
B0105/53 S P squib malfunction S Airbag sensor assembly
S Airbag sensor assembly malfunction S Wire harness
WIRING DIAGRAM
Airbag Sensor Assembly
A20
P Squib (Front Passenger Airbag Assembly)
10
1 Y-R
C21 P+
11
2 Y-G
C21 P-
H01454
2002 4RUNNER (RM887U)
Author : Date : 586
DI-41 1
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check P squib circuit.
PREPARATION:
P Squib Release the airbag activation prevention mechanism of the
Airbag connector (on the airbag sensor assembly side) between the
Sensor front passenger airbag assembly and the airbag sensor assem-
Assembly bly.
CHECK:
For the connector (on the front passenger airbag assembly
side) between the front passenger airbag assembly and the air-
P- P+ bag sensor assembly, measure the resistance between P+ and
P-.
OK:
Resistance: 1 M or Higher
(-) (+)
R14286
H02142 H02251
NG Repair or replace harness or connector be-
tween front passenger airbag assembly and air-
bag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 587
DI-412
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
P Squib (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.
ACC
(b) Clear DTC stored in memory.
ON
(See page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
or
conds.
DLC1 (d) Turn ignition switch to ACC or ON, and wait at least for 20
DTC B0105/53
seconds.
(e) Check DTC.
(See page DI-377 )
OK:
E1 Tc DTC B0105/53 is not output.
H01023 HINT:
AB0118 AB0119
R13006 H01077 H07479 Codes other than code B0105/53 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 : 588
DI-413
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check P squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
P Squib
Airbag
(b) Disconnect negative (-) terminal cable from the battery,
Sensor and wait at least for 90 seconds.
Assembly (c) Connect the front passenger airbag assembly 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-
conds.
or (b) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
DLC1
DTC B0105/53 (c) Clear DTC stored in memory.
(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
H01024 seconds.
AB0118 AB0119
R13006 H01077 H01202 (f) Check DTC.
(See page DI-377 )
OK:
DTC B0105/53 is not output.
HINT:
Codes other than code B0105/53 may be output at this time, but
they are not relevant to this check.
NG Replace front passenger airbag assembly.
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 : 589
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