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Wiring Diagrams and Connections for Head Unit

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Hello all,


I'm trying to install this Head Unit on my 2014 Alphard (ATH20) and I've got some connection issues. Not sure which one is the ones for sound and which are for the steering wheel. Are any of you able to send a wiring diagram or connection list?



We are also using this to connect in-between. Not sure if this helps.


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Those connections are identical to mine. It has been a bit of a nightmare trying to replace that head unit with a Pioneer one. I have identified some connections. I have to go out soon but will post a fuller acount of what I have discovered, later today.

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