An idle air management (IAC) valve is a tool that controls the quantity of air that bypasses the throttle valve when the engine is idling. This permits the engine to keep up a constant idle pace, even when the load on the engine adjustments. A defective IAC valve could cause the engine to idle too excessive or too low, or to stall. Checking the IAC valve is a comparatively easy process that may be executed with a number of primary instruments.
The IAC valve is usually positioned on the throttle physique or consumption manifold. It’s often a small, spherical gadget with a black or grey plastic housing. To test the IAC valve, you have to a multimeter and a 12-volt energy supply. First, disconnect {the electrical} connector from the IAC valve. Then, join the optimistic lead of the multimeter to the optimistic terminal of the IAC valve, and the destructive lead of the multimeter to the destructive terminal of the IAC valve. The multimeter ought to learn 12 volts. If it doesn’t, then the IAC valve is defective and must be changed.
