Fans Low Speed

Special Functions/Output Control/Fan Relays

Turns ON the cooling fan low relay. The normal commanded state of the fan relay is NONE. The ECM allows cooling fan relay control when the ignition is ON and the engine is OFF.

Fans High Speed

Special Functions/Output Control/Fan Relays

Turns ON the cooling fan low, cooling fan high and cooling fan control relays. The normal commanded state of the fan relays is NONE. The ECM allows cooling fan relay control when the ignition is ON and the engine is OFF.