Fuel Pump Control Module

Fuel Pump Control Module





The fuel pump control module is located in the rear LH (left-hand) quarter adjacent to the parking aid control module.

The fuel pump is control by the ECM (engine control module). The ECM (engine control module) sends a PWM (pulse width modulation) signal to the fuel pump control module from pin B20 of the ECM (engine control module), the frequency of the signal determines the duty cycle of the pump. the PWM (pulse width modulation) signal to the pump represents half the ON time of the pump. If the ECM (engine control module) transmits a 50% on time the fuel pump control module drives the pump at 100%. If the ECM (engine control module) transmits a 5% ON time the fuel pump control module drives the pump at 10%. The fuel pump control module will only turn the fuel pump ON if it receive a valid signal between 4% and 50%. When The ECM (engine control module) requires the fuel pump to be turned OFF the ECM (engine control module) transmits a duty cycle signal of 75%.

The status of the fuel pump control module is monitored by the ECM (engine control module) on pin B21. Any errors can be retrieved from The ECM (engine control module). The fuel pump control module cannot be interrogated for diagnostic purposes.

The MAP (manifold absolute pressure) controls The fuel pump control module in response to inputs from the fuel rail pressure sensor, MAP (manifold absolute pressure) and the MAF (mass air flow) /IAT (intake air temperature) sensor.

Harness Connector C2369 pin out details