Possible Causes
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
DTC 86/B1168 could be caused by a short to battery in circuit ICL+ (Violet wire) and circuit ICL- (Orange wire) in left side curtain air bag squib circuit, left side curtain air bag squib malfunction or air bag sensor assembly malfunction.
NOTE:
During testing, if DTCs other than DTC 86/B1168 are displayed, disregard them.