The ISCA (Idle Speed Control Actuator) is designed to maintain a steady desired idle speed. Idle airflow is adjusted through the idle air actuator in order to maintain the desired idle speed under various load conditions. Load conditions vary due to numerous factors, such as engine temperature, air conditioning, electrical load and power steering load.
If the real engine speed is lower than the desired engine speed over 100 rpm under enable conditions, ECM sets P0506.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Rationality check, low | ● Poor connection ● Clog in intake air system ● Carbon pile ● ISCA ● ECM |
Enable Conditions | ● Vehicle speed = 0 ● Intake air temperature > -7.5℃ ● Altitude < 3000m ● Idle status ● Idle controller I part = 15.0% ● Engine load < 35% | |
Threshold Value | ● Desired engine speed - Engine speed > 100rpm | |
Diagnostic Time | ● 8 sec | |
MIL | ● ON |
Temperature | Closing Coil Resistance (Ω) | Opening Coil Resistance (Ω) |
20~35℃(68~95℉) | 15.4±0.8 | 11.9±0.8 |
