General Information

Engine Control
P0264 Cylinder 2 Injector Circuit Low - General Information

Component Location





General Description

The Gasoline Direct Injection (GDI) system injects high pressure fuel directly into the combustion chamber.
The high pressure injectors have an internal swirl disk which rotates with fuel flow to help atomize the discharging fuel.
This causes the fuel to evaporate rapidly, which reduces inlet air temperature.
This cooler atomized air/fuel inlet charge increases power output.

DTC Description

P0264 is set when the LOWSIDE Circuit of Cyl. 2 Injector driver shorts to ground.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data




- Ch A : INJ HIGHSIDE signal during fuel injection (Normal idle state)
- Ch B : INJ LOWSIDE signal during fuel injection (Normal idle state)

1 Ready:Pre-energizing range for the quick response of injector.
ECU drives specific duty pulse to a injector.
During "Ready", Injector doesn't work yet. The supply voltage to a injector is 12V.
2 Rise:ECU starts to peak current rapidly for injector working.
The supply voltage is upturned from 12V to 55V. At the peak of current, injector starts to open.
3 Peak/Hold:Holding the peak current until the injector would be completely open.
4 Hold:ECU drives specific duty pulse for holding the injector's open state.
The injector will quickly close once the PCM discontinues current.