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 displays
-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
100 BTDC while operating in Bypass mode, the displayed Spark advance only reflects true spark timing when the PCM has commanded IC mode.