DTC U0109: Lost Communication With Fuel Pump Control Module A

DTC U0109: LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULE A

Description:	If the FPM circuit is fixed at a low or high voltage, the PCM begins to increment a counter. This DTC sets when the PCM is not detecting a duty cycled signal on the FPM circuit after a calibrated amount of time.
Possible Causes:	FPM circuit open FPM circuit short to ground FPM circuit short to voltage VPWR fuel circuit open GND 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 .