State Display Inputs and Outputs

DESCRIPTION

The switch inputs that are used by the engine controller have only two states, HI and LOW. Because of the logical process of the engine controller, it cannot determine the difference between a selected switch position and an open or shorted circuit, or a defective switch. If the change from OFF to ON or ON to OFF is displayed (scan tool) then it can be assumed that the entire switch circuit to engine controller is functional. Connect the scan tool to the vehicle and access "State Displays" then, access "Inputs and Outputs".