[MTCB Android Head Units Q&A] Gazz.E90:
Hi, I have a S07 rk3066 7" mtcb-kyd-v2.59 v4.4.4 - fitted in my 2007 BMW E90.

I need a 20PIN wire diagram and canbus 16pin diagram, as the previous owner fitted the harness from a different broken head unit.

The 20pin socket wires are wrong.

I have had to cut all but the left speaker wires, positive power yellow, GND black, and ACC red. I have found that pins 17-20 are the right front & rear, pin 6 is ILLUM, as for the rest I don't know which go to the canbus (BMW-BG-04). The 2 green wires on the canbus that go to the BMW Harness must be correct, as I get a beep when I have my E90 in reverse. So must be the yellow +, black GND, and the red Acc. As for the rest???

**I don't want to start trying wires in different locations as I might damage the canbus, HU, or BMW.

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Looking at the rear of the unit, pin1 is top left=

1. Left Speaker -

2. Leftl Speaker -

3. Left Speaker -

4. Left Speaker -

5.

6. ILLUMINATION

7.

8.

9. AMP +

10. ANTENNA +

11. Right Speaker -

12. Right Speaker -

13. Right Speaker -

14. Right Speaker -

15. GND

16. POWER POSITIVE +

17. ACCESSORY

18.

19.

20.

Obviously I just need to find the 6 wires that go from the harness to the canbus. The 2 green wires that go from the bmw harness to the canbus must be correct (or at least 1 of them), as the canbus beeps when I put it in reverse.)

Below are some photos of the above 20pin socket list, the canbus socket wires and the head unit diagram on the HU (which doesn't match up with the wires in the actual socket I have though ☹).

So, if anyone with the same unit can provide a diagram of the harness sockets, canbus wires, etc, I would really appreciate it.

Cheers...

Ps. I've messaged the previous owner to look for the correct harness, he said he'll look for it, but no joy after a week.

BTW, the android unit works in everyway, apart from the steering wheel buttons, and detecting open doors, boot, reverse camera, etc. (Illumination works if I cut the pin 6 wire and feed it to the bmw harness ILLUM wire (pin 14, if I remember), though I take it that the canbus should detect my BMW's lights?).

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Pic #1. This harness 20pin HU socket isn't the correct one for this head unit. The previous owner of my BMW e90 installed it after the previous HU died, obviously used the old harness.

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Pic #2. The canbus (BMW-BG-04). I'm not sure which wires should go to my BMW and which goes to the HU. I get a beep when I put my car in reverse, but I get nothing else canbus related.

(Again, the harness and all canbus wires (apart from positive +, GND, Acc, front left speakers, rear left speakers. And CANBUS = POSITIVE + & GND, Acc.) all the rest are wrong).

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My S07 MTCB-KYD RK3066 WIRE LIST.

(Unfortunately with the harness I HAVE, most of the wire colours & positions are different).

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Heres a diagram I drew listing the colours on the 20pin socket that goes into the head unit. How someone can install a replacement android head unit and not realise that the front and rear right speakers didn't work, the steering wheel buttons didn't work (apart from the 'recirculation button' for the air conditioning unit), illumination didn't come on with the BMW's lights, and the radio reception was terrible, as the antenna wire wasn't in the right place, is beyond me.

He even said that everything worked before the previous head unit died, haha. Wow!

Anyway, if someone could post some photos of the correct sockets - the 20pin one and the canbus socket too (or a written list/manual would be cool too), I would really appreciate it.

Thanks in advance........... 👍🏼