Hyundai Sonata: Engine Control System / Injector Troubleshooting

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Engine Control System / Injector Troubleshooting

Signal Waveform

The three waveforms below are taken from the #1 and #4 injectors. The top waveform is from the high side (feed side) of the #1 and #4 injectors, while the middle waveform is from the low side (ground side) of the #1 injector and the bottom waveform is from the low side of the #4 injector.

The middle waveform is the same as the top waveform because there is no ground for the circuit. With no current flowing in the circuit, the #1 injector is not energized and fuel does not flow.

The bottom waveform shows that ground is supplied and there is a voltage drop across the #4 injector. With current flowing in the circuit, the #4 injector is energized and fuel flows.

Injector Specifications

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

Injector Schematic Diagrams

Circuit Diagram ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Specifications
Specifications Fuel Delivery System ItemsSpecificationFuel TankCapacity70 lit. (18.5 U.S.gal., 74.0 U.S.qt., 61.6 Imp.qt.)Fuel FilterTypePaper typeFuel PressureLow Pressure Fuel Line480 ~ 500 kPa (4.89 ~ 5.1 kgf/cm?, 69.6 ~ 72.5 psi)High Pressure Fuel Line2.0 ~ 15.0 MPa (20.4 ~ 153.0 kgf/cm? ...

Hyundai Sonata LF 2014-2019 Service Manual: Front Driveshaft Repair procedures
Removal 1. Raise the vehicle, and make sure it is securely supported. 2. Remove the wheel cap (A). Be careful not to damage to the wheel cap (A) when removing the it. 3. Remove the front wheel and tire (A) from front hub. Tightening torque : 88.3 ~ 107.9 N. ...