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DI-414
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI1B7-36
DTC B0106/54 Open 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 B0106/54 is recorded when an open is detected in the P squib circuit.
DTC No. DTC Detecting Condition Trouble Area
S Open circuit in P+ wire harness or P- wire harness S Front passenger airbag assembly (P squib)
B0106/54 S P squib malfunction S Airbag sensor assembly
S Airbag sensor assembly malfunction S Wire harness
WIRING DIAGRAM
See page DI-410 .
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check P squib circuit.
CHECK:
For the connector (on the front passenger airbag assembly
P Squib
Airbag side) between the front passenger airbag assembly and the air-
Sensor bag sensor assembly, measure the resistance between P+ and
Assembly P-.
OK:
Resistance: Below 1
P- P+
(-) (+)
NG Repair or replace harness or connector be-
R14286 tween front passenger airbag assembly and air-
H02142 H02251
bag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 590
DI-415
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
P Squib (a) Connect the connector to the airbag sensor assembly.
Airbag (b) Using a service wire, connect P+ and P- of the connector
Sensor (on the front passenger airbag assembly side) between
Assembly the front passenger airbag assembly and the airbag sen-
sor assembly.
(c) Connect negative (-) terminal cable to the battery, and
ACC ON wait at least for 2 seconds.
P- P+ CHECK:
(a) Turn ignition switch to ACC or ON and wait at least for 20
or
seconds.
DLC1 (b) Clear DTC stored in memory.
DTC B0106/54
(See page DI-377 )
(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 Tc seconds.
H01023
H02144
(e) Check DTC.
AB0118 AB0119
R13006 H01078 H02253 (See page DI-377 )
OK:
DTC B0106/54 is not output.
HINT:
Codes other than code B0106/54 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 : 591
DI-416
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 ACC or ON, and wait at least for 20
seconds.
or (b) Clear DTC stored in memory.
(See page DI-377 )
DLC1
DTC B0106/54 (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
seconds.
(e) Check DTC.
E1 Tc
(See page DI-377 )
H01024
AB0118 AB0119 OK:
R13006 H01078 H01205
DTC B0106/54 is not output.
HINT:
Codes other than code B0106/54 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 : 592
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