In progress iPad Air dash mod
#34
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So I decided with the help of a friend of mine, to do a test install of the Sony GS radio. Ran into an interesting hiccup.
The radio powers up perfectly, the sound plays fine through the factory amp with the PAC-TATO adapter attached. However, and this I've never heard of until now. The climate control TURNS ON, AND the screens power. But you can't see what you're controlling. They stay powered, but blank.
After some extensive research (and reading in the PAC kit that the Toyota PRIUS vehicles suffer the same fate), it seems like you have to get a 68 ohm resistor and find the TX+ and TX- that's going into the changer (on a separate harness) which apparently when applied, triggers the screen control to work. I figured this out after reading about Metra harnesses which require the same treatment. I also consulted an electrical technician at Toyota this afternoon who explained the behavior of the screen and said that apparently this is normal.
According to the PAC instructions, we have to add a resistor to pins 9 and 10 (9 being pink, 10 being brown). Him and I looked up what pins 9 and 10 on the 20 pin harness colored "pink" and "brown" actually connect to on the PRIUS while I was there. We found TX+ and TX-.
All the instructions say is: "in vehicle x, add the resistor to pins 9 and 10" .. the color of the wires were different from vehicle to vehicle. So I paid the $15 to access all of the Toyota wiring diagrams on my laptop. On 3 different lexus vehicles (as per the harness instructions) and the PRIUS, they ALL point to jumping TX+ and TX- with a resistor from the connector going into the changer on non-Mark Levinson systems.
So Friday will be the day I decide to test this on the Lexus as I found the leads on the IS 250 (also conveniently on pins 9 and 10). Here's to hoping LOL.
The radio powers up perfectly, the sound plays fine through the factory amp with the PAC-TATO adapter attached. However, and this I've never heard of until now. The climate control TURNS ON, AND the screens power. But you can't see what you're controlling. They stay powered, but blank.
After some extensive research (and reading in the PAC kit that the Toyota PRIUS vehicles suffer the same fate), it seems like you have to get a 68 ohm resistor and find the TX+ and TX- that's going into the changer (on a separate harness) which apparently when applied, triggers the screen control to work. I figured this out after reading about Metra harnesses which require the same treatment. I also consulted an electrical technician at Toyota this afternoon who explained the behavior of the screen and said that apparently this is normal.
According to the PAC instructions, we have to add a resistor to pins 9 and 10 (9 being pink, 10 being brown). Him and I looked up what pins 9 and 10 on the 20 pin harness colored "pink" and "brown" actually connect to on the PRIUS while I was there. We found TX+ and TX-.
All the instructions say is: "in vehicle x, add the resistor to pins 9 and 10" .. the color of the wires were different from vehicle to vehicle. So I paid the $15 to access all of the Toyota wiring diagrams on my laptop. On 3 different lexus vehicles (as per the harness instructions) and the PRIUS, they ALL point to jumping TX+ and TX- with a resistor from the connector going into the changer on non-Mark Levinson systems.
So Friday will be the day I decide to test this on the Lexus as I found the leads on the IS 250 (also conveniently on pins 9 and 10). Here's to hoping LOL.
Last edited by djbuddha; 04-29-14 at 04:24 PM.
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iPads are getting smaller not bigger.
If I upgrade the iPad to a smaller dimension in the future, I can see Soundman releasing upgrade molds (like an adapter that would slide into full sized iPads car installs like this, but for a newer smaller ipad). He just had to get a lightning connector coupler made up and fiber glassed in. That's one thought. By that time, we'll see some ways to preserve installs like this I'm sure.
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Edit: Also, from checking the car, it seems he positioned the buttons on a more upward angle (probably to accommodate the screen for the climate control). The illusion is the ipad panel itself being downward. I have faith in his work as he carefully measures and does these panels ALL the time.
Last edited by djbuddha; 05-01-14 at 01:29 PM. Reason: Add on about the climate control screen
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#43
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this is really cool. I actually had a similar idea about a year ago but it was to design a stand that could be bolted on so that controls aren't moved around. I also don't know how legal it is to have an ipad as a entertainment unit on a vehicle so should i need to remove i can do so effortlessly. Previously school, money, and knowledge of how to manufacture were factors holding me back but i worked with metals and resins this semester and im back on the job force so hopefully this summer break i can tackle it.
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this is really cool. I actually had a similar idea about a year ago but it was to design a stand that could be bolted on so that controls aren't moved around. I also don't know how legal it is to have an ipad as a entertainment unit on a vehicle so should i need to remove i can do so effortlessly. Previously school, money, and knowledge of how to manufacture were factors holding me back but i worked with metals and resins this semester and im back on the job force so hopefully this summer break i can tackle it.