Electronically controlled fuel injector is a solenoid valve which supplies exactly calculated amount of fuel to engine for optimum conbustion under various engine load and speed. To meet air-fuel ratio required in system, ECM regulates fuel injection quantity as controlling injector solenoid operating duration referring air flow to cylinders and output signals from HO2S. For this precise control, quick response of solenoid is required and for perfect combustion, injection characteristic is important.
If there is Open in injector #3 circuit, ECM sets DTC P0203.
Item
Detecting Condition
Possible Cause
DTC Strategy
? Circuit continuity check, open
? Poor connection
? Open or short to ground in power circuit
? Open in control circuit
? Injector
? ECM
Enable Conditions
Threshold Value
Diagnostic Time
? Continuous
MIL ON Condition
? 5 sec
Temperature[?]
Resistance[?]
20
14.5±0.7