Toyota Celica 2005 Repair Manual page 1178

DTC B0138/72
CIRCUIT DESCRIPTION
The P/T squib LH circuit consists of the airbag sensor assembly and the 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 B0138/72 is recorded when a B+ short is detected in the P/T squib LH circuit.
DTC No.
S Short in P/T squib LH wire harness (to B+)
B0138/72 S P/T squib LH malfunction
S Airbag sensor assembly malfunction
WIRING DIAGRAM
See page DI−967.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI−1025).
2 Check floor wire.
ON
Floor Wire
P/T Squib LH
(−)
AB0119
H01016
H08394
OK
2005 CELICA (RM1131U)
DIAGNOSTICS
DTC Detecting Condition
Airbag
Sensor
Assembly
PL+
(+)
H08269
− SUPPLEMENTAL RESTRAINT SYSTEM
Short in P/T Squib LH Circuit (to B+)
S Seat belt pretensioner LH (P/T squib LH)
S Airbag sensor assembly
S Floor wire
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and PL+
of the floor wire connector on the seat belt pretensioner
LH (P/T squib LH) side.
OK:
Voltage: Below 1 V
NG Repair or replace floor wire.
1177
Trouble Area
DI−977
DI6PQ−23