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 actual engine speed is more than 100 rpm lower than desired engine speed, P0506 is set.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Rationality check, low | ● Poor connection ● Clog in intake air system ● Carbon pile ● ISCA |
Enable Conditions | ● Vehicle speed = 0 ● Coolant temperature > 70℃ ● Intake air temperature > -6℃ ● Altitude < 3000m ● Idle status ● Idle speed control torque > 14.84% ● No error on the related sensors. (VSS,ECTS,IATS,etc) ● Idle speed control torque > 14.84% ● Engine load < 35% ● No error on the PCV ● Monitoring of VSS is ended | |
Threshold Value | ● Desired engine speed - Engine speed > 100rpm | |
Diagnostic Time | ● 8 sec | |
MIL ON Condition | ● 2 driving cycle |
Temperature(℃) | Closing Coil Resistance (Ω) | Opening Coil Resistance (Ω) |
20~35 | 15.4±0.8 | 11.9±0.8 |
