Fuel Pump Controller

To reduce evaporative emissions, the fuel return pipe and adopt the fuel pump controller is deleted system.

The fuel pump controller receives a PWM signal from the engine control module (ECM). Current flow to the low-pressure fuel pump varies with signal strength. Pump delivery pressure and rate are regulated.

The fuel pump controller is installed to the left rear side of the vehicle frame in front of the spare tire.

Fig 1: Identifying Fuel Pump Controller

Courtesy of ISUZU MOTOR CO.

Fig 2: Identifying Flow Chart Of Fuel Pump Controller

Courtesy of ISUZU MOTOR CO.