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 logical successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la
Spark
Scan Tool Range
-64 degrees to
64 degrees. Displays the spark timing being commanded by the
PCM on the IC circuit. A negative (-) value indicates degrees Before Top Dead Center
(BTDC) or spark advance; a positive value indicates degrees After Top Dead Center
(ATDC) or spark retard. Because the
ignition control module sets spark advance at a fixed value of
10 degrees BTDC while operating in Bypass mode, the displayed Spark advance only reflects true spark timing when the PCM has commanded IC mode.