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
Loop Status
Display shows OPEN LOOP or CLOSED LOOP. Closed Loop displayed indicates that the AF ECU is controlling fuel delivery according to
oxygen sensor voltage. In Open Loop, the AF ECU ignores the oxygen sensor voltage and bases the amount of fuel to be delivered on other input sensors. At extremely high ambient temperatures or when towing a trailer, it is possible for the system to remain in Open Loop operation in order to control
catalytic converter temperatures.