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

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Fuel Pump




The fuel pump motor, located inside the fuel tank, supplies fuel pressure to the fuel injectors. The PCM controls the fuel pump motor by controlling the fuel pump relay. The fuel pump motor is supplied constant ignition voltage

whenever the fuel pump relay is turned On. The PCM turns On the fuel pump relay whenever the engine is running or for 2 seconds when the ignition is turned On and the engine is not running.