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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Idle Air Control (IAC) Valve
The Tech 2 displays the
IAC pintle position in counts. A count of "O" indicates the
PCM is commanding the IAC pintle to be driven all the way into a fully-seated position. This is usually caused by a vacuum leak.
The higher the number of counts, the more air is being commanded to bypass the throttle blade. In order to diagnose the
IAC system, refer to IAC System Check.
