DTC P0628-00: Fuel Pump Control Module Circuit Low Input: Notes

DTC P0628:00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC P0628:00	Fuel pump control module circuit low input
DETECTION CONDITION	When the PCM outputs a duty signal to the fuel pump control module, the difference in voltage between fuel pump unit terminals A and B is less than 1.5 V for a continuous 5 s. Diagnostic support note This is a continuous monitor (CCM). The check engine light does not illuminate. FREEZE FRAME DATA is not available. Snapshot data is available. DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Not applicable
POSSIBLE CAUSE	Fuel pump unit connector or terminals malfunction Fuel pump unit malfunction Fuel pump control module connector or terminals malfunction Short to ground in wiring harness between fuel pump unit terminal A and fuel pump control module terminal 2C Open circuit in wiring harness between the following terminals: Fuel pump unit terminal A-Fuel pump control module terminal 2C Fuel pump unit terminal B-Fuel pump control module terminal 2D Fuel pump control module malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.