Head Unit wiring

[Ben23]

Hi gang

I bought an aftermarket Android unit with a new fascia for my AH10 facelift, foolishly believing that because the fascia was specifically designed for this vehicle, the correct interconnect looms would also be provided to interface between the new head unit's stock wiring, and the Alphard's. They did include a whole bunch of interconnects, but literally not a single plug of my current wiring fits in any of their sockets!

I haven't managed to find any looms containing sockets for the plugs I have. It may be that my Alphard head unit is not the original one, although it is Toyota. It's certainly not one of the standard ones that most AH10s seem to have, and the sockets are different from any "for Toyota" loom I've found so far.

 

I attach pictures of the old head unit and the plugs that fit it. Does anyone recognise these plugs/sockets, and can either point me to a conversion loom, sockets with bare wires, or even just pinout diagrams? I'm not an electronics noob, I can probably figure out what's what but it will be an extremely tedious process - any shortcut would be appreciated!

 

Edited March 8 by Ben23

[Ben23]

Update: As I suspected the 16-pin connector in the last photo is the main one. It's the same size as the 16-pin main socket on the new head unit, but it doesn't fit because those two pins on the right are too far apart. Just as well, because the wiring was completely different! Fortunately the wire colours were standard, so I've been able to wire that one up, and I now have power and sound. Just need to figure out all the others now...

[Tens]

When I did this, the seller asked for photos of the back of the old unit. There were adapter cables that came with the new unit. But it was slightly concerning that several of the old cables were not needed so were left just hanging there. It all worked perfectly though.

Maybe send your photo to the supplier and ask for adapters. 

[John Harrison]

Hi. I have a 2008 AH20 2.4. The new head unit put in by my son for me didn't require some of the old cables as they were for Jap Analogue TV and am/fm radio. Other cables were for Jap toll road payment systems, do also not required.

Hope this is of help.

John Harrison. Wallasey, Wirral.

[TallGuy]

On 3/8/2025 at 12:11 PM, Ben23 said:

Hi gang

I bought an aftermarket Android unit with a new fascia for my AH10 facelift, foolishly believing that because the fascia was specifically designed for this vehicle, the correct interconnect looms would also be provided to interface between the new head unit's stock wiring, and the Alphard's. They did include a whole bunch of interconnects, but literally not a single plug of my current wiring fits in any of their sockets!

I haven't managed to find any looms containing sockets for the plugs I have. It may be that my Alphard head unit is not the original one, although it is Toyota. It's certainly not one of the standard ones that most AH10s seem to have, and the sockets are different from any "for Toyota" loom I've found so far.

 

I attach pictures of the old head unit and the plugs that fit it. Does anyone recognise these plugs/sockets, and can either point me to a conversion loom, sockets with bare wires, or even just pinout diagrams? I'm not an electronics noob, I can probably figure out what's what but it will be an extremely tedious process - any shortcut would be appreciated!

 

Hi Ben. Out of interest was it the smaller sized head unit or the bigger one (ah10 had 2 variants depending on whether it was early or later version I believe)? Pic of mine, 2003 which was the smaller one

[Ben23]

9 hours ago, TallGuy said:

Hi Ben. Out of interest was it the smaller sized head unit or the bigger one (ah10 had 2 variants depending on whether it was early or later version I believe)?

There seem to have been many different head units over the years of the AH10. Mine was a particularly unusual one because my Alphard is the "limited edition Dual AVN special" - which literally just means it had a Dual AVN head unit, which I believe was so called because it could show two apps at the same time. Probably revolutionary for 2005 but also the reason why all of the bloody plugs were different than most of its peers 😠 I got the Android unit fitted in the end but it was a very laborious process of going wire-by-wire.

Edited 16 hours ago by Ben23