Idle Speed Control (ISC) System

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 (720 +30-20) rpm





6. Verify that the idle speed is within specification under the conditions shown.
7. If not as specified, inspect the input signal.