EC

Indicates that an EPAS alignment check (correction code 31001500) is to be performed. Add the EPAS alignment check as a separate correction in the same activity. If the vehicle passes the EPAS check, an alignment is not necessary. If the vehicle fails the EPAS check, perform an alignment check (correction code 31002100).

AC

Indicates that a four wheel alignment check is to be performed in order to determine whether an alignment adjustment is necessary. Add the alignment check (correction code 31002100) or adjustment (correction code 31002300) as a separate correction in the same activity.

NA

Indicates that No Alignment is necessary, or not applicable.