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Home >> Oldsmobile >> 1991 >> Toronado Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> A/C-Heater System - Automatic >> Trouble Shooting >> Output Data Display Code Definitions >> Notes

Output Data Display Code Definitions: Notes

When trouble shooting a malfunction, ECM and BCM output cycling can be actuated regardless of inputs and normal program instructions. Once a test is selected, except for ECM Idle Air Control (IAC), test will display "HI" or "LO" for 3 seconds in each state to indicate command and output terminal voltage.