Kia Cee'd: Engine Control System / Injector Troubleshooting

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   Item Specification Coil Resistance (Ω) 1.5 ± 5％[20°C(68°F)] ...

Injector Schematic diagrams

Circuit Diagram ...

Other information:

Kia Cee'd JD Service Manual: Crankshaft Position Sensor (CKPS) Repair procedures
Inspection 1. Check signal waveform of CKPS and CMPS using a GDS. Specification: Refer to “Waveform” Removal 1. Turn the ignition switch OFF and disconnect the battery negative ...

Kia Cee'd JD Owners Manual: Caring for Disc
If the temperature inside the car is too high, open the car windows to ventilate before using the system. It is illegal to copy and use MP3/WMA files without permission. Use CDs that are created only by lawful means. Do not apply volatile agents, such as benzene and thinner, ...