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DI-395
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI4CQ-05
DTC B0107/51 Short in P Squib Circuit (to Ground)
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 B0107/51 is recorded when ground short is detected in the P squib circuit.
DTC No. DTC Detecting Condition Trouble Area
S Short circuit in P squib wire harness (to ground) S Front passenger airbag assembly (P squib)
B0107/51 S P squib malfunction S Airbag sensor assembly
S Airbag sensor assembly malfunction S Wire harness
WIRING DIAGRAM
See page DI-388 .
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-486 ).
2 Check P squib circuit.
CHECK:
P Squib For the connector (on the front passenger airbag assembly
Airbag side) between the front passenger airbag assembly and the air-
Sensor
Assembly
bag sensor assembly, measure the resistance between P+ and
body ground.
OK:
Resistance: 1 M or Higher
P+
(-) (+)
H01227
NG Repair or replace harness or connector be-
H02145 H02254 tween front passenger airbag assembly and air-
bag sensor assembly.
OK
2001 SIENNA (RM787U)
Author : Date : 549
DI-396
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
P Squib (b) Using a service wire, connect P+ and P- of the connector
Airbag (on the front passenger airbag assembly side) between
Sensor
Assembly the front passenger airbag assembly and the airbag sen-
sor assembly.
(c) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
ACC ON
CHECK:
P- P+
(a) Turn the ignition switch to ACC or ON and wait at least for
or 20 seconds.
(b) Clear the DTC stored in memory
(See step 5 on page DI-358 ).
DLC1 DTC B0107/51
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
E1 Tc
H01023 H02144 (e) Check the DTC (See page DI-358 ).
AB0118 AB0118
R13006 H01075 H02255 OK:
DTC B0107/51 is not output.
HINT:
Codes other than code B0107/51 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
2001 SIENNA (RM787U)
Author : Date : 550
DI-397
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check P squib.
PREPARATION:
P Squib (a) Turn the ignition switch to LOCK.
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 the ignition switch to ACC or ON, and wait at least
for 20 seconds.
or
(b) Clear the DTC stored in memory
DLC1 DTC B0107/51
(See step 5 on page DI-358 ).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch to ACC or ON, and wait at least
for 20 seconds.
E1 Tc
(e) Check the DTC (See page DI-358 ).
H01024 OK:
AB0118 AB0119
R13006 H01075 H01196 DTC B0107/51 is not output.
HINT:
Codes other than code B0107/51 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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.
2001 SIENNA (RM787U)
Author : Date : 551
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