Idle Speed/Throttle Actuator - Mechanical: Testing and Inspection

AIR VALVE

1. Connect jumper wire between diagnosis connector TEN and GND terminals.
2. Connect a tachometer.
3. Start engine.
4. Idle speed should gradually decrease as engine warms up and air valve closes.

IDLE SPEED CONTROL (ISC) VALVE

1. Unplug ISC valve connector.
2. Measure resistance across terminals. It should be 10.7 - 12.3 ohms @ 68°F (20°C).
3. If not as specified, replace valve.