Coolant temperature sensor (CTS) translates temperature signal of coolant into voltage signal, and sends it to ECU.
1, adjust dosage of petrol injection: dosage will increase when temperature is low;
2, adjust timing angle: increase timing angle when temperature is low, and decrease timing angle to avoid knock when temperature is high;
3, impact on idle speed control valve: when coolant temperature is low, ECU will activate idle speed control valve to increase RPM;
4, impact on EGR valve;