DTC U0109 - Lost Communication With Fuel Pump Control Module A

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U0109 - LOST COMMUNICATION WITH FUEL PUMP CONTROL MODULE A

Description:	The PCM monitors the 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. This DTC sets 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 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 MA .