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
Fuel Pump Relay Control
Control of the
fuel pump relay is an output function of the ECM. The main relay provides operating power for the fuel pump relay. After the initial ignition ON input, the ECM provides a ground for the
fuel pump control circuit. The circuit is maintained with the presence of the engine speed signal. The fuel pump relay supplies operating power to the in-tank mounted fuel pump.
