Idle Speed Control (ISC) System

System Inspection
1. Warm up the engine and let it idle.




2. Verify that the fast idle cam separates.
3. Turn all electrical loads OFF.




4. Connect a tachometer to the data link connector terminal IG-.
5. With the coolant fan off, verify that the idle speed is within specification.

Idle speed (Neutral or P range): 700-750 rpm




6. Verify that the idle speed is within specifications under the conditions shown.