Test 12A - Bus Bias Level Or Bus (+/-) Open
WARNING: This page is about a different car, the 1994 Plymouth Acclaim, 1994 Dodge Spirit, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
BUS BIAS LEVEL OR BUS (+/-) OPEN trouble code test is separated by body classification. See test 12D for AJ body.