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 meat air-fuel ratio required in system, PCM 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.
Checking output signals from injectors under detecting condition, if an output signal is low, PCM sets P0261. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Signal Low | ● Poor connection ● Open or short to ground in power harness ● Open or short to ground in control harness ● Injector ● PCM |
Enable condition | ● Engine running state ● 11V ≤ Battery voltage ≤ 16V ● Above conditions are met > 0.5sec. ● No disabling faults present | |
Treshold Vue | ● Open or short to ground | |
Dagnosis Tme | ● Continuous | |
MIL On Condition | ● 2 driving cycles |
Item | Coil resistance(Ω) |
Injector | 13.8 ~ 15.2Ω( at 20°C/ 68°F) |
