VEMS Community Forum

Technical => Wiring & Sensors => Topic started by: M-Tech on January 01, 2008, 12:38:18 pm

Title: Subaru IAC valve (6 wire)
Post by: M-Tech on January 01, 2008, 12:38:18 pm

As I've noticed the IAC solenoid has 4 channels not two.
How to control and what settings to use with them?
6 wires, 2 of them are +12 volts and 4 are going to the ecu so they must be separate channels.

Title: Re: Subaru IAC valve (6 wire)
Post by: [email protected] on January 01, 2008, 01:38:59 pm

Sounds like a stepper motor IAC to me.  You'll need to find out more from the original Subaru information.

Title: Re: Subaru IAC valve (6 wire)
Post by: dnb on January 01, 2008, 08:02:27 pm

The MY99 EJ20 turbos have steppers as Rob says.  They obviously connect to the stepper driver on the VEMS.  You then have to set the step sequence in the VEMS config so that it drives the motor in the right direction - info is on the wiki for this.

Title: Re: Subaru IAC valve (6 wire)
Post by: M-Tech on January 02, 2008, 02:21:48 pm

I was afraid of that.

Now I suppose I have to use coilpack w/o ignition amplifier or can I wire the coilpack with ignition amplifier to other outputs?

Title: Re: Subaru IAC valve (6 wire)
Post by: [email protected] on January 02, 2008, 08:05:38 pm

Well there are two choices:
1) Remove the IGBTs and bridge the drive to the output.
2) Get a different coil like an early Subaru type, coil near, or what ever you can find thats cheap and easy :)

Rob

Title: Re: Subaru IAC valve (6 wire)
Post by: Denmark on August 22, 2008, 12:11:18 pm

The Subaru stepper can be controlled , without problems,
Just disconnect the 2  +12v wires!.

Just for info :)

/Skassa