Possible Causes
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
DTC 39/B1155 could be caused by a head impact sensor assembly malfunction, air bag sensor assembly malfunction or defective wiring harness.
NOTE:
During testing, if DTCs other than DTC 39/B1154 are retrieved, disregard them.