PURPOSE: To avoid engine stall by connecting the fuel pump directly to the power source through direct drive circuit while bypassing the voltage control circuit upon fault of voltage control circuit for performing variable control of the driving voltage thereby feeding fuel continuously.

CONSTITUTION: Voltage control circuit 2 will perform variable control of driving voltage continuously through chopper control mainly composed of a switching transistor 4 where the voltage is controlled with correspondence to the duty ratio of a control signal (a) produced from a total control circuit 5 thus to control the fuel pump 1. Abnormality detection circuit 3 will monitor the voltage VA at the point A where the voltage is divided by a resistor 8 in said circuit 2 thus to detect the abnormally excessive or low current and to feed a detection signal (b) to said circuit 5 thus to turn on a relay 6 and to connect the fuel pump 1 directly to the power source 7.