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)

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General Information







The engine control module (N3/4) is located in the component compartment. Voltage is supplied from the overvoltage protection relay (K1/2). The control module receives engine operating data from sensors and controls the injectors and ignition.

In addition, an interface for the CAN data bus was implemented. Data exchange occurs between the engine control module (N3/4), the electronic accelerator control module (N4/1) or cruise control/ISC module (N4/3), and the diagnostic module (N59) in California version vehicles.

ISC = Idle Speed Control