Mixture Ratio Feedback System: Operation: Notes

When engine coolant is below the predetermined temperature of the coolant switch, the mixture ratio valve leans out the air/fuel mixture. When engine coolant is above the predetermined temperature of the coolant switch and vehicle speed is above the predetermined speed of the speed switch, the mixture ratio valve is activated and leans out the air/fuel mixture. When engine coolant is above the predetermined temperature of the coolant switch and vehicle speed is below the predetermined speed of the speed switch, mixture ratio valve is deactivated and air/fuel mixture is richened.