P027B - Fuel Pump Module Control Circuit Range/Performance

DTC DESCRIPTION P027B - FUEL PUMP MODULE CONTROL CIRCUIT RANGE/PERFORMANCE

Description:	The fuel pump control module 2 monitors the duty cycle and frequency of the signal it receives from the PCM. The fuel pump control module 2 determines if the signal from the PCM on the FPC circuit is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module 2 sends a 20% duty cycle signal on the FPM2 circuit to report the concern to the PCM. This DTC sets when the fuel pump control module 2 is still reporting that it is receiving an invalid duty cycle or frequency from the PCM after a calibrated amount of time.
Possible Causes:	FPC circuit open or short to ground FPC circuit short to voltage Radio frequency interference or electromagnetic interference Damaged fuel pump control module 2 Damaged PCM
Diagnostic Aids:	Check the harness for routing, alterations, incorrect shielding, or electrical interference from other systems.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test KC .