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: Audio Remote Control Components and Components Location
Components 1. Left Remote Control Switch (Audio + Hands free)2. Right Remote Control Switch(Cruise+Trip Computer) ...

Hyundai Sonata LF 2014-2019 Service Manual: Cruise Control Switch Repair procedures
Inspection [Measuring Resistance] 1. Disconnect the cruise control switch connector from the control switch. 2. Measure resistance between terminals on the control switch when each function switch is ON (switch is depressed). Function switchTerminalResistanceSET -3 - 5550?±5%RES +3 - ...