PCM monitors Air/Fuel ratio of the each cylinder based on O2 sensor signal. PCM performs this monitoring for 30sec with a part load and constant speed, and corrects fuel quantity of the each cylinder.
PCM sets DTC, If it detects inbalance of Air/Fuel correction in each cylinder.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Erratic Air/Fuel correction value | 1. Fuel leakage or stuck in injector 2. Air leakage in cylinder 3. Ignition system error in cylinder 4. Abnormal compression pressure in cylinder |
Enable Conditions |
•
Engine coolant temperature is higher than 73℃
•
1250 rpm ＜ Engine speed ＜ 2688 rpm
•
No disabling faults P0011,P0030,P0106,P0116,P0121,P0131,P0171,P0221 P0261,P0301,P0441,P0562,P0638,P2101,P2192,P2195 | |
Threshold Value | ||
Diagnostic Time |
•
5 times | |
Mil On Condition |
•
2 Drive Cycles |
Cylinder Compression Pressure | Value |
Specification | 13.0kg/㎠ |
Threshold | 11.5kg/㎠ |
Deviation between Cylinders | Below 1.0kg/㎠ |
Injector | Specification |
Coil Resistance(Ω) | 13.8~15.2(20℃) |
