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
Spark
Scan Tool Range
-64 degrees to
64 degrees. This 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° BTDC while operating in Bypass mode, the displayed spark advance only reflects true spark timing when the PCM has commanded the IC mode.