Fuel Pump Driver Module
The Fuel Pump Driver Module (FPDM) is located in the rear LH quarter adjacent to the parking aid control module.
The fuel pump is control by the ECM. The ECM sends a PWM signal to the FPDM, the frequency of the signal determines the duty cycle of the pump. The PWM signal to the pump represents half the ON time of the pump. If the ECM transmits a 50% on time the FPDM drives the pump at 100%. If the ECM transmits a 5% ON time the FPDM drives the pump at 10%. The FPDM will only turn the fuel pump ON if it receives a valid signal between 4% and 50%. When The ECM requires the fuel pump to be turned OFF the ECM transmits a duty cycle signal of 75%.
The status of the FPDM is monitored by the ECM. Any errors can be retrieved from the ECM using IDS. The FPDM cannot be interrogated for diagnostic purposes.
The MAP controls The FPDM in response to inputs from the fuel rail pressure sensor, MAP and the MAF/IAT sensor.