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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Fuel Pump Module Helpful Information

Circuit K6 splices to supply 5 volts to the manifold absolute pressure sensor.

Circuit K4 splices to supply ground for the signals from the following:

^ Upstream heated oxygen sensor
^ Downstream heated oxygen sensor
^ Battery temperature sensor
^ Camshaft position sensor
^ Crankshaft position sensor
^ Engine coolant temperature sensor
^ Manifold absolute pressure sensor
^ Knock sensor
^ Intake air temperature sensor
^ Vehicle speed sensor