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P0263 Cylinder 1 Contribution/Balance

AutoHex Online Help: Hyundai i20(PB) 2010
Component Location
General Description

Injectors spray fuel in the highly compressed combustion chamber, and power generates through combustion process.

Fuel pressure is raised to 1600bar in common rail diesel engine for the purpose of making fuel into minute particles. And fuel devided into minute particles leads smoke reduction, high power generation, and improved fuel efficiency. To control pressure of 1600bar with solenoid, oil pressure surbo is applied. And injector solenoids is actuated by solenoid operating voltage raised to 80V with the method of current control.

Niddle valve inside of injector is located between A and B chamber. If applied pressure to B chamber is relived by injector solenoid, niddle valve is raised by the pressure of A chamber then, fuel is injected. If same pressure is applied to A and B chamber, niddle valve closes by the elasticity then, fuel injection stops.

As electronically controlled injector is applied instead of mechanical injector, pilot and post injection, injeciton duration and quantity control are achieved. And engine performance is improved by these control.



DTC Description

P0263 is set when Injection speed difference of Cylinder #1 is higher than programed value compare with other Injectors.This code is due to injector component.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

Current monitoring

Injector component

Enable Conditions

Engine running

Threshold Value

Injection speed difference of Cylinder #1 is higher than programed value compare with other Injectors

Diagnostic Time

Immediately

Fail Safe

Fuel cut

NO

EGR Off

NO

Fuel Limit

YES

Check Lamp

NO

Specification

Injector Component Resistance

Injector Operating Voltage

Injector Control Type

0.179O±0.015 (20?)

80V

Current control

Diagnostic Circuit Diagram
Signal Waveform

Fig.1) Magnified waveform of main injection at Fig.1)