General Information

Engine Control
P0204 Injector Circuit/Open-Cylinder 4 - 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

P0204 is set when the Cyl. 4 injector driver circuit is open.

DTC Detecting Condition





Specification





Diagnostic Circuit Diagram





Signal Waveform & Data

- Highside(HS14) and Lowside(LS_4) signals of Cyl. 4 Injector during injection.




1. - Normal signal at the HIGHSIDE terminal(HS_14)
- Power supply to No.1 & No.4 injectors
2. - Normal signal at the LOWSIDE terminal(LS_1)
- No.1 injector not working
3. - Normal signal at the LOWSIDE terminal(LS_4)
- No.4 injector working
- Normal operating signal of ECU HS_14, LS_1 and LS_4 during Cyl. 4 Injection.
** ECM's HIGHSIDE control circuit(HS_14) is connected to No.1 and No.4 injectors together and ECM's HIGHSIDE control circuit(HS_23) is connected to No.2 and No.3 injectors together.