DTC U0109: Lost Communication With Fuel Pump Control Module

U0109 - LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULE

Description:	The powertrain control module (PCM) monitors the fuel pump monitor (FPM) circuit for the presence of a duty cycled signal. If the FPM circuit is fixed at a low or high voltage, the PCM begins to increment a counter. The test fails when the PCM is still not detecting a duty cycled signal on the FPM circuit after a calibrated amount of time.
Possible Causes:	FPM circuit open or short to ground FPM circuit short to voltage VPWR fuel circuit open PWRGND circuit open Damaged fuel pump control module relay
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST KC .