[svxistentialist]

Originally Posted by rmjjensen

I've done this with a simple voltage divider and a switch.

Yes it works, but you can't simply hold +5V to the TPS input. The power light will eventually shut off after 5-10 seconds or so if the voltage is remained constant.

However, what you can do which DOES work is pulse +5V to the TPS input on the TCU with a 555 timer. I gaurentee that will work 100%.

Here was my original post: http://www.subaru-svx.net/forum/showthread.php?t=20197

Mike
Can you throw some light on this question for me?
You described using a pulsed or interrupted 5V signal to the TCU pin for the TPS signal. You may have used a voltage divider to provide 5V, and interrupted the 5V using a 555 timer.

Now you say this genuinely works, and turns on Power mode.

However, in your earlier descriptions, you mention that showing the TCU this WOT voltage also sends the gearbox into defcon 5 mode, i.e. it activates kickdown to the lowest gear.

Can you please verify if this is the case? If the TCU needs to see variable voltage there on that pin, so it can decide when to activate kickdown, then this applied fluctuating 5V to the TPS input pin will give Power mode OK, but may also apply kickdown full-time, which is a little less desirable for those who want to live.

What's the story? How did it work for you?

Thanks

Joe