General Description (J35A8)

The fuel pump control module system monitors the voltage applied to the fuel pump in response to the duty signal from the engine control module (ECM)/powertrain control module (PCM). When the voltage applied to the fuel pump is normal, the fuel pump control module system outputs a high diagnosis signal, and when the voltage applied is abnormal, it outputs a low signal. The ECM/PCM monitors this diagnosis signal whenever the engine is running.

When the diagnosis signal from the fuel pump control module system is low for a set time or more, the ECM/PCM detects a malfunction and a DTC is stored.