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)

Or, hide this message: temporarily or permanently

FP Relay

Display shows Fuel Pump Relay as ON or OFF. When the ignition switch is turned to the ON position, the PCM turns the fuel pump relay ON for two seconds. If the PCM does not receive ignition reference pulses within two seconds, the PCM will shut OFF the fuel pump.