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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Control of Fuel Pump





The engine control module (ECM) activates the main relay (2/32) when the ignition is switched ON. At the same time the fuel pump (FP) relay (2/23) is activated for one second to enable the fuel pump (6/33) to build up pressure.