Idle Air Control Valve - Air Regulator Circuit

DESCRIPTION
The idle air control valve (IACV)-air regulator provides an air by-pass when the engine is cold for a fast idle during warm-up. A bimetal, heater and rotary shutter are built into the IACV-air regulator. When the bimetal temperature is low, the air by-pass port opens. As the engine starts and electric current flows through a heater, the bimetal begins to turn the shutter to close the by-pass port. The air passage remains closed until the engine stops and the bimetal temperature drops.







DIAGNOSTIC PROCEDURE

EC-AIRREG-01 IACV-Air Regulator:

WIRING DIAGRAM

COMPONENT INSPECTION
1. Disconnect EFI (IACV-air regulator) sub-harness connector.




2. Check IACV-air regulator resistance.

Resistance: Approximately 7O - 8O Ohms at 25°C (77°F)

3. Check IACV-air regulator for clogging.