Signal Waveform & Data

Fig 1: Normal Waveforms Of Injector Under Idle Condition

Courtesy of HYUNDAI MOTOR CO.

When the ECM energizes the injector by grounding control circuit, the circuit voltage should be low (theoretically 0V) and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is closed and circuit voltage should be peak at a moment.