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 there is Open or Short to ground in ISCA(closing coil) circuit, PCM sets DTC P1507.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Circuit continuity check, low (closing coil) | ● Poor connection ● Open or short to ground in control circuit ● ISCA |
Enable Conditions | ● Vehicle speed = 0 ● Coolant temperature > 70℃ ● Intake air temperature > -6℃ ● Altitude < 3000m ● Idle status ● Monitoring of VSS is ended ● No error on the related sensors. (VSS,ECTS,IATS,etc) | |
Threshold Value | ● Shorted to ground or disconnected | |
Diagnostic Time | ● Continuous | |
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 |
