DTC P0627: Fuel Pump Control Module System Malfunction: General Description

The fuel pump control module monitors the voltage applied to the fuel pump in response to the duty signal from the powertrain control module (PCM). When the voltage applied to the fuel pump is normal, the fuel pump control module outputs a high diagnosis signal, and when the voltage applied is abnormal, it outputs a low signal. The PCM monitors this diagnosis signal whenever the engine is running. When the diagnosis signal from the fuel pump control module is low for a set time or more, the PCM detects a malfunction and stores a DTC.