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Home >> Chevrolet >> 2001 >> Cavalier L4-2.2L VIN 4 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> - Bi-Fuel/Alternative Fuels >> Vehicle On-Board Diagnostics (Accessing and Clearing Codes) >> Scan Tool Data Definitions >> (Alt. Fuel) Fuel Pump Relay Command
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(Alt. Fuel) Fuel Pump Relay Command

Display shows ON or OFF. The display indicates the commanded state of the AF Fuel Pump relay. The gasoline fuel pump power circuit is routed through the AF Fuel Pump relay. Whenever the engine is operating on alternative fuel the AF ECU commands the AF Fuel pump relay ON, opening the gasoline fuel pump power circuit. The AF ECU opens the gasoline fuel pump power circuit in order to prevent unnecessary gasoline fuel pump operation.
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