Base Idle Settings

[Holden202T]

yeah that's a possibility but he also said the IAC is getting hot so that would possibly indicate the wiring is working.

[antus]

yeah, but 12v DC on the line would also do that and cause it to not work. Quite a bit less likely, but possible. Just saying.

[Dylan]

Thanks guys I'm getting a lend of one of a mate to see what happens. I will report back.
I also tried another ecu but same deal.

[Dylan]

I went and got one from a mate tonight but yet to try it. I unbolted it with key off and it was extended.
We then turned key on and it stayed where it was.

I will connect it to mine later and see what happens.

[Dylan]

So I plugged in my mates solenoid. No movement in or out. Push it in by hand, put ecu into diagnostic mode with engine off still no movement.
Fitted a standard chip still no movement.

I have been doing these tests without the engine running as throttle body is off and to late at night to be testing this.

I will look into the wiring next as suggested.

[Dylan]

Looked at some wiring diagrams today and noticed the diagnostic plug wiring. I was bridging the wrong pins! (amateur!)

[Holden202T]

black and white with black trace ??

[Dylan]

Yep, I was just looking at the front of the plug it's a VR Commodore and thought it was the bottom 2 pins that are together turns out it's the bottom 2.
So I will assemble the throttle body again and see why the solenoid won't extend when the motor is running.
I will have to get the USB connector for under the steering column that VL400 makes.