Operation CHARM: Car repair manuals for everyone.
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
If it fails: lemon-manuals.org.ua

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HA - Testing Notes

ADAPTIVE FUEL
The Powertrain Control Module (PCM) uses adaptive fuel logic primarily to compensate for normal variability in fuel system components. If, during normal vehicle operation, the fuel system appears biased rich or lean, adaptive fuel will make a corresponding shift in the fuel delivery calculations to compensate and remove the bias.

NOTE
You should enter this Pinpoint Test only when directed from Diagnostic Routines.