Test 5: Idle Control Valve
- Valve should be open when vehicle is at rest (no voltage to valve). When voltage is applied to valve (engine on), valve should close. Remove 2 valve hoses and observe valve operation. If valve does not operate as described, replace valve.
- If valve operates properly, pull off connector plug and connect voltmeter between the 2 wires in plug. Start engine and turn A/C on. Voltmeter should read battery voltage. If it does not, see TEST 6 for idle control unit.