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S-AFC installation. Help!

JimX

By JimX,
in Engines & Forced Induction

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JimX Grand Master

JimX

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Well I finally got around to installing the S-AFC, but major problems! No frying of circuitrry thankfully, but the unit just won't power up.

I double-checked all the wiring and it was all fine, but then I noticed the power wire wasn't actually getting any power at all (2nd from the edge on the last row of 20). However, the one next to it, 3rd from the edge, was getting 12v. So tentatively I wired the power up to this wire, but the unit still wouldn't power up.

To make sure I didn't kill anything I disconnected the loom and it started up fine, so the ECU isn't fried. But I don't know why this AFC isn't working. Could it be dead? Do I have to press some buttons to switch it on or something? (manual doesn't say). Can I check it by sticking the power and earth wires across a battery, or does it require a signal wire as well to switch on? This is driving me crazy, it took ages to wire up because of all the splicing I had to do.

If I can't sus it out I think I'll have to send the unit back.

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https://www.sau.com.au/forums/topic/5539-s-afc-installation-help/
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JimX Grand Master

JimX

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Ah, got it sorted. I was sharing the soldering duties with a friend, and he stuffed up the ground connection :) I put this back on correctly and it was all sweet. I also found that the mysterious power pin which never seemed to have any voltage on it whether the ignition was on or off is still the correct wire to drive the unit.

It has NVRAM so you don't have to worry about d/c the battery (tested it), and I daresay that when the car is off it draws absolutely no power from your battery.

The manual was a bit ambiguous for the In/Out settings of the Hot Wire sensor numbers (it seems they both need to be set to the same even though the example has a different number for the second) but the engine seemed happy to set the In/Out both on 4 and it's all running smoothly now. It stumbled a lot when I left the Out on 1 like in the example so I put it back to 4.

Now to get it tuned! Does anyone know who can do a decent job for a reasonable price in Sydney?

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