Kia Cee'd Quiz
Fuel System

Injector Troubleshooting

In this manual: Fuel System
General Information — 15Maintenance — 7Engine Mechanical System — 84Engine Electrical System — 49Emission Control System — 22Fuel System — 95Clutch System — 28Manual Transmission — 21Dual Clutch Transmission (DCT) System — 47Drive Shaft and Axle — 20Suspension System — 36Steering — 23Restraints — 39Brake System — 54Body (Interior and Exterior) — 209Body Electrical System — 254Heating, Ventilation, and Air Conditioning — 56
~1min read

Signal Waveform

The three waveforms below are taken from injectors No. 1 and No. 4. The upper waveform is taken on the high-pressure side (supply side) of injectors No. 1 and No. 4. The middle waveform is taken on the low-pressure side (ground side) of injector No. 1, and the bottom waveform is taken on the low-side of injector No. 4. The middle waveform is the same as the upper one because there is no ground for the circuit. When there is no current in the circuit, injector No. 1 is not energized and fuel does not flow. The lower trace shows that ground is supplied and there is a voltage drop across injector No. 4. When current flows in the circuit, injector No. 4 is energized and fuel flows.

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