Hyundai Sonata LF: 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...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Teaching Procedures 1. Key Teaching Procedure Key teaching must be done after replacing a defective PCM(ECM) or when providing additional keys to the vehicle owner. The procedure starts with an PCM(ECM) request for vehicle specific data (PIN code: 6digits) from the tester...
Hyundai Sonata LF 2014-2019 Service Manual: Repair procedures
Compession Pressure Inspection If the there is lack of power, excessive oil consumption or poor fuel economy, measure the compression pressure. 1. Make sure the oil in the crankcase is of the correct viscosity and at the correct level and that the battery is correctly charged...
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