P0627 - Fuel Pump A Control Circuit/Open - DTC Chart

P0627 - FUEL PUMP A CONTROL CIRCUIT/OPEN - DTC CHART

Description: The fuel pump control module monitors the fuel pump module and secondary circuits for a concern. If the fuel pump control module detects a concern with the fuel pump module or secondary circuits, the fuel pump control module sends an 80% duty cycle signal on the fuel pump monitor (FPM) circuit to report the concern to the PCM. The test fails when the fuel pump control module is still reporting a concern with the fuel pump module or secondary circuits after a calibrated amount of time.
Possible Causes: FPPWR circuit open FPPWR circuit short to ground FPRTN circuit open FPPWR circuit short to voltage FPRTN circuit short to voltage Damaged fuel pump assembly Damaged fuel pump control module
Diagnostic Aids: Check for any harness concerns. The fuel pump control module controls the speed of the fuel pump module by supplying a variable voltage to the fuel pump module on the FPPWR circuit.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test KC .