Description and Operation |
During cold start or in winter, the fuel efficiency can be improved by heating up the coolant with the exhaust gas heat discharged after combusting the engine. When the engine has been sufficiently warmed up, the valve on the passage of exhaust gas is opened to block the heat exchange of exhaust gas and coolant, thus to prevent overheating of coolant. The valve of the exhaust gas passage is opened and closed by the operation of wax actuator according to the temperature of coolant. To monitor the temperature of coolant, a separate water temperature sensor (WTS) is installed, and in the event of overheated coolant [over 120°C (248°F], the engine overheating warning lamp in the cluster is illuminated.
[Coolant Flow Chart]
Toyota Corolla 2019-2022 Owners Manual: Engine (ignition) switch (vehicles without a smart key system)
Starting the engine
1 Check that the parking brake is set. (®P.180, 181)
2 Check that the shift lever is in P (continuously variable transmission) or
N (manual transmission).
3 Firmly depress the brake pedal (continuously variable transmission) or clutch
pedal (manual transmission).
4 Turn the en ...
Kia Niro 2017 (DE HEV) Service Manual: Pre-Charge Resistor Specifications
Specification
Item
Specification
Resistance (Ω)
40 [20°C (68°F)]
Rated power (W)
40
...