Fuel Pump Control Unit: Description and Operation

Fuel System - Electronic Returnless:

For more information on Electronic Returnless Fuel System, refer to Electronic Returnless Fuel System

Fuel Pump Driver Module

The fuel pump driver module (FPDM) receives a duty cycle signal from the PCM and controls the fuel pump operation in relation to this duty cycle. This results in variable speed fuel pump operation. The FPDM sends diagnostic information to the PCM on the fuel pump monitor circuit.

Fuel Pump Driver Module Applications

Table 2 - Fuel Pump Duty Cycle Output From PCM:

The Fuel Pump (FP) signal is a duty cycle command sent from the powertrain control module (PCM) to the fuel pump driver module (FPDM) (Table 2). The FPDM uses the FP command to operate the fuel pump at the speed requested by the PCM or to turn the pump off.