DTC 31/B1100: Air Bag Sensor Assembly Malfunction: Description
WARNING: This page is about a different car, the 2002 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
The air bag sensor assembly consists of an air bag sensor, safing sensor, drive circuit, diagnosis circuit and ignition control. The air bag sensor assembly receives signals from the air bag sensors, determines whether or not the air bags must deployed and detects system malfunctions.
NOTE:
If a DTC other than DTC 31/B1100 is output at same time, repair other DTC before DTC 31/B1100.