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

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General Description

PURPOSE
The Engine Control Module (ECM) controls the fuel injection, ignition system and the idle speed system.

CONSTRUCTION
The ECM consists of an 8-bit microprocessor, random access memory (RAM), read only memory (ROM) and an Input/Output (I/0) interface. The ECM is also able to perform self-diagnostic procedures and provide back-up functions if certain circuits fail.