Operation CHARM: Car repair manuals for everyone.
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 System: Description and Operation

To optimize fuel injection and ignition, both systems are controlled by a single electronic control unit (ECU). Input signals provided to the ECU by the various sensors are used for both ignition control and fuel injection.
Refer to the COMPUTERIZED ENGINE CONTROLS for description and operation of the Motronic Engine Management System.