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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Engine Controls - System & Component Tests - 2.2L) >> Fuel Systems (Gasoline) >> Fuel Pump Electrical Circuit Diagnosis >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Pontiac Sunfire, 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The Powertrain Control Module (PCM) enables the fuel pump relay when the ignition switch is turned to RUN position. The PCM will disable the fuel pump relay within two seconds unless the PCM detects ignition reference pulses. The PCM continues to enable the fuel pump relay as long as ignition reference pulses are detected. The PCM disables the fuel pump relay within two seconds if ignition reference pulses cease to be detected and the ignition switch remains in RUN position.

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