6. Check ISCA For Normal Operation

1. Remove the ISCA from throttle body and check for sticking.
2. Connect the ISCA battery terminal 2 to a 12V power supply. One at a time, momentarily ground the opening coil terminal 1 and closing coil terminal 3 while verifying that the valve closes when the closing coil is grounded and that the valve opens when the opening coil is grounded.
3. Repeat several times to ensure reliability.
   Fig 1: Checking ISCA Operation

   Courtesy of HYUNDAI MOTOR CO.

Is ISCA working properly? 

Yes: Go to next step.

No: Clean or replace ISCA.