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
Ignition Timing Control
IGNITION TIMING CONTROLThe ignition power transistor located in the ignition primary circuit turns on and off to control primary current flow to the
ignition coil. This maintains ignition timing at an optimum level regardless of various engine operating conditions. The PCM determines the ignition timing according to engine speed, intake air volume, engine coolant temperature, and atmospheric pressure.