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 Short to power in ISCA(opening coil) circuit, PCM sets DTC P1506.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Circuit continuity check, high (opening coil) | ● Poor connection ● Short to power 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 battery voltage | |
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 |
