Hyundai Sonata: Engine Control System / Injector Description and Operation

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Engine Control System / Injector Description and Operation

Description

The GDI injector is similar to a standard injector, but sprays fuel at a much higher pressure directly into the combustion chamber and has a swirl disc to get the fuel swirling as it exits the nozzle. This aids in atomization of the fuel.

The ECM controls both the feed circuits (high side) to feed voltage to the injectors and the ground circuits (low side) to energize the injectors. Also, the feed for 2 injectors comes from the same driver set. As the ignition coils are paired with cylinders (1-4 and 2-3), the injectors are also set up in pairs.

Accelerator Position Sensor (APS) Repair procedures

Inspection 1. Connect the GDS on the Data Link Connector (DLC). 2. Turn the ignition switch ON. 3. Measure the output voltage of the APS 1 and 2 at C.T and W.O.T. Specification: Refer t ...

Injector Specifications

Specification ItemSpecificationCoil Resistance (?)1.5 ± 0.075 [20°C(68°F)] ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Water Temperature Control Assembly Repair procedures
Removal and Installation 1. Loosen the drain plug, and drain the engine coolant. Remove the radiator cap to drain with speed. 2. Disconnect the battery negative terminal. 3. Remove the air cleaner assembly. (Refer to Intake and exhaust system - "Air Cleaner") 4. Disconnect the wate ...

Hyundai Sonata LF 2014-2019 Owners Manual: Rear Parking Assist System
The Rear Parking Assist System assists the driver during reverse movement of the vehicle by chiming if any object is sensed within the distance of 50 inches (120 cm) behind the vehicle. This system is a supplemental system that senses objects within the range and location of the sensors, it cann ...