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Discussion Starter · #1 · (Edited)
So I've replaced the head unit with a cheap ATOTO Android thing, everything seems to be working except one thing, the steering wheel controls. That has an analog SWC port [edit: actually it has two wires, key and key+, so I wired them to the provided jack. I assume, since this is impedance, I can't get them backwards? Although at this point I've tried both ways.], so I got a Axxess ASWC-1 put it in, and I think everything there is wired correct there...I got the standard Toyota ASWC-1 harness.

There are, IIRC, two long flashes to indicate they are hooked up, and from what I can see that's all the wires the harness is trying to hook up...I will check that later.

But it doesn't work.

The weird thing is if I walk through the 'button holding reprogramming' on the ACWC-1, it _does_ seem to sense the buttons being pressed, because it moves to the next button. (And the fact I can trigger that by holding Volume Up is informative.)

OTOH, the head unit can reprogram buttons, so logically even if buttons were being misidentified, the head unit should still sense them on the remapping screen and let me remap them!

But no button I push seems to make anything happen. At all. On the head unit.

It's like the ACWC-1 knows what buttons I'm pushing...and is completely refusing to send any of them on.

Or perhaps the head unit input doesn't work. But the problem seems to be in a ACWC-1. I've tried checking the impedance on the output line (It is hard to know I'm doing this correctly.), and a few buttons seem to change the impedance...and other buttons don't.

Here's something I'm not quite understanding...I have the USB interface, and connected it to the head unit (It has USB), and I can change what the output is (And I have manually tried every since one.)...but why can't I see what inputs it thinks is happening? That seems really stupid, and would immediately cut in half the possible problems if it did that...I could at least see if the problem was the input or output. Why is there not a screen that flashes whatever button it thinks you currently are pushing, or lets you push button and send commands manually?

So, anyway, my question is: What should be my next step?

This the 2016 Scion iM.
 

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So I've replaced the head unit with a cheap ATOTO Android thing, everything seems to be working except one thing, the steering wheel controls. That has an analog SWC port [edit: actually it has two wires, key and key+, so I wired them to the provided jack. I assume, since this is impedance, I can't get them backwards? Although at this point I've tried both ways.], so I got a Axxess ASWC-1 put it in, and I think everything there is wired correct there...I got the standard Toyota ASWC-1 harness.

There are, IIRC, two long flashes to indicate they are hooked up, and from what I can see that's all the wires the harness is trying to hook up...I will check that later.

But it doesn't work.

The weird thing is if I walk through the 'button holding reprogramming' on the ACWC-1, it does seem to sense the buttons being pressed, because it moves to the next button. (And the fact I can trigger that by holding Volume Up is informative.)

OTOH, the head unit can reprogram buttons, so logically even if buttons were being misidentified, the head unit should still sense them on the remapping screen and let me remap them!

But no button I push seems to make anything happen. At all. On the head unit.

It's like the ACWC-1 knows what buttons I'm pushing...and is completely refusing to send any of them on.

Or perhaps the head unit input doesn't work. But the problem seems to be in a ACWC-1. I've tried checking the impedance on the output line (It is hard to know I'm doing this correctly.), and a few buttons seem to change the impedance...and other buttons don't.

Here's something I'm not quite understanding...I have the USB interface, and connected it to the head unit (It has USB), and I can change what the output is (And I have manually tried every since one.)...but why can't I see what inputs it thinks is happening? That seems really stupid, and would immediately cut in half the possible problems if it did that...I could at least see if the problem was the input or output. Why is there not a screen that flashes whatever button it thinks you currently are pushing, or lets you push button and send commands manually?

So, anyway, my question is: What should be my next step?

This the 2016 Scion iM.
Wow, your question is much more detailed than mine. I have a 2017 Corolla iM and just had a new Jensen head unit installed with satellite radio. Since installation, my steering wheel controls won’t let me scan from pre set to pre set on the satellite radio and the audio dealer states that it’s not possible because the iM never came with a satellite radio from the factory. That kinda makes sense but I also know that there’s a separate interface ca the controller and I’m wondering if someone knows of a controller that works in this situation
 
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