Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

IAC Duty Cycle

The scan tool range is 0 to 100 percent. This scan tool parameter indicates the opening of the bypass air passage in terms of percentage. The opening of the bypass air passage determines the amount of air flowing through the bypass air passage and is controlled by the IAC motor.