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)
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IAC - Idle Air Control
The
Idle Air Control (IAC) is controlled by the
Electronic Control Module (ECM) to maintain specified
idle speed. The ECM controls the IAC in with voltage pulses (counts) and these counts are displayed in this position. The number of counts displayed represents the position the ECM ``thinks'' the IAC is in. Normal readings are in the
5-50 range.