The Evaporative Emission Control System is designed to prevent fuel vapors from escaping into the atmosphere.
Canister
Fuel vapors generated inside the fuel tank are absorbed and stored in the onboard canister. When the engine is running, the fuel vapors absorbed in the canister are drawn into the surge tank through the purge control solenoid valve.
Purge Control Solenoid Valve (PCSV)
The purge control solenoid valve is controlled by the Engine Control Module (ECM); when the engine coolant temperature is low during idling, the PCSV closes so that evaporated fuel is not taken into the engine. After the engine warms up during ordinary driving, the PCSV opens to introduce evaporated fuel to the engine.
Kia Niro 2017 (DE HEV) Service Manual: Evaporator Temperature Sensor Repair procedures
Inspection
1.
Switch "OFF" the ignition.
2.
Disconnect the evaporator temperature sensor connector.
3.
Measure the resistance between positive (+) and negative (-) terminals
of the evaporator temperature se ...
Kia Niro 2017 (DE HEV) Service Manual: Motor Control Unit (MCU) Components and components location
Components Location
1. HPCU assembly
...