Fuel Pump

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.







- All Systems except the M70 V12 engine Systems use a single submersed (in the fuel tank) fuel pump. The M70 V12 configuration consists of two redundant fuel supply systems.
- The pump "primes" the system when the ignition is switched on, and will run continuous when the engine control module senses engine RPM via the crankshaft position sensor.
- The pump supplies constant fuel volume to the injection system, in fact more than the system requires.
- The pickup for the pump is protected by a mesh screen.