Toyota Celica 2005 Repair Manual page 1181

DI−980
DTC B1100/31
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of the airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.
DTC No.
B1100/31 S Airbag sensor assembly malfunction
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than code B1100/31.
1 Prepare for inspection (See step 1 on page DI−1025).
2 Check voltage at IG1 and IG2 of airbag sensor assembly.
Airbag Sensor Assembly
ON
IG1
(−) (+)
AB0119
H01298
OK
2005 CELICA (RM1131U)
DIAGNOSTICS
Airbag Sensor Assembly Malfunction
DTC Detecting Condition
CHECK:
(a)
(b)
IG2
OK:
NG
H01299
− SUPPLEMENTAL RESTRAINT SYSTEM
S Airbag sensor assembly
Turn the ignition switch to ON.
Measure the voltage between the body ground and each
of terminals IG1 and IG2 of the airbag sensor assembly
connector.
Voltage: 10 − 14 V
Check that an abnormality occurs on the battery
and charging system.
1180
Trouble Area
DI6PR−21