H01454
P21
P/T Squib (LH)
Airbag Sensor Assembly
PL+
PL–
Y–B
Y
1
2
1
2
C22
C22
DI–646
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
908
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
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 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 B0135/73 is recorded when a short is detected in the P/T squib (LH) circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B0135/73
Short circuit between PL+ wire harness and PL– wire har-
ness of squib
P/T squib (LH) malfunction
Airbag sensor assembly malfunction
Seat belt pretensioner (LH)
Airbag sensor assembly
Wire harness
WIRING DIAGRAM
DI55H–02
H01016
H02141
H02211
P/T Squib (LH)
Airbag
Sensor
Assembly
PL–
PL+
(+)
(–)
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–647
909
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
INSPECTION PROCEDURE
1
Prepare for inspection. (See step 1 on page DI–675)
2
Check P/T squib (LH) circuit.
PREPARATION:
Release the airbag activation prevention mechanism of the
connector (on the airbag sensor assembly side) between the
airbag sensor assembly and the seat belt pretensioner (LH).
(See page DI–588)
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and PL–.
OK:
Resistance: 1 MΩ or Higher
NG
Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
H01017
AB0119
H01086
H10600
H10627
P/T Squib (LH)
Airbag
Sensor
Assembly
DTC B0135/73
ON
CG
Tc
→ ←
DLC3
DI–648
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
910
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
3
Check airbag sensor assembly.
PREPARATION:
(a)
Connect the connector to the airbag sensor assembly.
(b)
Connect negative (–) terminal cable to the battery, and
wait at