Possible Causes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
DTC 31/B1100 could be caused by a air bag sensor assembly malfunction.
NOTE:
If a DTC other than DTC 31/B1100 is displayed at same time as DTC 31/B1100, repair fault indicated by DTC other than DTC 31/B1100 before using this procedure.