Idle air control valve

Stepper IAC

4-wire regulator connection

6-wire regulator connection (1JZ engine)

Attention! Power outputs 2 and 5 are not connected!

After connecting, it is necessary to check whether the regulator is moving when manually controlling the position of the IAC. If the regulator is buzzing but does not move, or does move to the opposite side - you need to swap a couple of wires, and try again. Until the correct polarity of the motor is found.

Solenoid IAC (2-wire)

Inside - the coil and the return spring. When submitting PWM-pulses, the valve opens according to the supplied power. When the power is turned off, the valve returns to the initial position by spring.

The usual frequency of PWM for IAC - 70..100 Hz.

Solenoid IAC (3-wire)

Inside - two coils. One for closing, other for opening the valve.

The usual frequency of PWM for IAC - 70..100 Hz.

Connecting to the pair of PWM channels

It is necessary to connect the IAC to the paired PWM channels. Invershon should be activated on one of the channels.

Connecting to the single PWM channel

An external circuit is needed. MOSFET with rated current >5A, rated voltage >55V is needed.

The dotted line indicates IAC valve.