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)
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Ignition Timing Connector: Description and Operation
The test switch terminal is included in the engine-room monitor coupler. When this terminal is grounded, ECM sets the
ignition timing to the initial ignition timing.
When both test switch terminal and diagnosis switch terminal are grounded, ECM outputs A/F duty through the duty output terminal.
