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 200 RPM higher than desired engine speed, P0507 is set.
Item | Detecting Condition | Possible Cause | |
DTC Strategy | ● Rationality check, high | ● Poor connection ● Leak in intake air system ● Carbon pile ● ISCA | |
General Enable Conditions | ● Vehicle speed = 0 ● Coolant temperature > 70℃ ● Intake air temperature > -6℃ ● Altitude < 3000m ● Idle status ● 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 | ||
Case 1 | Enable Conditions | ● Idle speed control torque ≤ -15% ● Idle speed controller control duty ≤ 18% | |
Threshold Value | ● Desired engine speed ? Engine speed < -200rpm | ||
Case 2 | Threshold Value | ● Fuel cut-off ≥ 3times | |
Diagnostic Time | ● 15 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 |
