drienties
Posts: 5
Joined: Tue Oct 04, 2022 6:25 am
Delivery Date: 04 Oct 2020

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

that's unfortunate, thanks for your work and research thus far. I just started this adventure, head unit just arrived. waiting for the connectors to make the adapter based on schematic posted.
CeladonCityNPC
Posts: 51
Joined: Fri Apr 29, 2022 1:29 pm
Delivery Date: 15 Aug 2021

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

drienties wrote: Tue Oct 04, 2022 9:31 am that's unfortunate, thanks for your work and research thus far. I just started this adventure, head unit just arrived. waiting for the connectors to make the adapter based on schematic posted.
Great - I'll keep following the thread to see if you post updates! Good luck and I hope you get it working, I'm sure I was close :)

Where did you buy your headunit and how much did it cost, if you don't mind sharing?
drienties
Posts: 5
Joined: Tue Oct 04, 2022 6:25 am
Delivery Date: 04 Oct 2020

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

Found mine at partan.eu for 320 euro ex shipping

Looked for some reviews first because it looked a bit shady. But turns out to be a normal company. Had mine shipped from Lithuania to the netherlands in about 3 days. no idea if it works yet though, will start tinkering this weekend.

Unit looks fine and undamaged, most likely they salvage parts from wrecked cars.

I'm giving this a go because my old unit quit working 4mo out of warranty, and while nissan did offer me a "discount" on a new radio, the price was way to high for me.
Last edited by drienties on Tue Oct 04, 2022 11:51 am, edited 1 time in total.
CeladonCityNPC
Posts: 51
Joined: Fri Apr 29, 2022 1:29 pm
Delivery Date: 15 Aug 2021

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

drienties wrote: Tue Oct 04, 2022 11:49 am Found mine at partan.eu for 320 euro ex shipping

Looked for some reviews first because it looked a bit shady. But turns out to be a normal company. Had mine shipped from Lithuania to the netherlands in about 3 days. no idea if it works yet though, will start tinkering this weekend.

Unit looks fine and undamaged, most likely they salvage parts from wrecked cars.

I'm giving this a go because my old unit quit working 4mo out of warranty, and while nissan did offer me a "discount" on a new radio, the price was way to high for me.
Wow, not a bad price. Good find! I was actually looking at partan.eu yesterday while searching for the camera control unit - had exactly the same thoughts as you because the site looked somewhat shady.

Yeah Nissan charges exorbitant prices for the headunit replacements, if we can get everything working here it'd be an excellent option for folks needing a new one.
Is your car a Tekna? As I see it, for Acenta and N-Connecta there probably aren't too many issues as far as the replacement goes because you can tap into the different camera inputs on the back. In fact, you could probably add a reverse camera for Leafs without one.
drienties
Posts: 5
Joined: Tue Oct 04, 2022 6:25 am
Delivery Date: 04 Oct 2020

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

Mine is a Tekna, so fingers crossed. i might have some trips to the dealer for coding the VIN and other stuff on the new unit.

Hope you can get your unit revived and it's only a blown fuse.

Had a look at the inside of my new unit trough the vent holes and the extra microcontroller PCB on your's indeed is not present in mine so most likely an addition from the previous owner. wonder if there's more documentation to find on it somewhere.

update:
Minor setback. connectors arrived. no pins and 2x male instead of male + female.
Since the old radio is broken anyway I might just repin the current connectors instead of making a cable. Hoping to make a start this weekend.
drienties
Posts: 5
Joined: Tue Oct 04, 2022 6:25 am
Delivery Date: 04 Oct 2020

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

Progress, repinned the original connectors according to Danep82's diagram.
Only thing missing is the extra ground pin on the small connector. fired up the car and radio anyway to check.

Radio powers on to the locked red notice and i'm unable to get into the diagnostics menu. CAN network seems to work since i'm getting my menu items back in the dash which were missing since the old radio broke. had a split second of satic noise on startup from the FM radio as well.

i'll sort out the ground pin and then it's off to the dealer to see if they want/can unlock my radio.

leafspy does trow a evc-279 DTC, i will check all my pinning again before going to the dealer. But so far it's looking ok.

What i did notice was that my car is missing the pins for the TCU Tel pins, not sure if this is a model specefic thing. i can remotely control my HVAC etc so assume it has a TCU

I think i also figured out your extra PCB in the radio: https://zelemar.eu/nissan-can-filter-installation/
looks like it is indeed to bypass the vin coding. might be a plan B if unlocking via the dealer is not possible/to expensive
Last edited by drienties on Sun Oct 09, 2022 4:08 am, edited 1 time in total.
CeladonCityNPC
Posts: 51
Joined: Fri Apr 29, 2022 1:29 pm
Delivery Date: 15 Aug 2021

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

drienties wrote: Sun Oct 09, 2022 3:41 am Progress, repinned the original connectors according to Danep82's diagram.
Only thing missing is the extra ground pin on the small connector. fired up the car and radio anyway to check.

Radio powers on to the locked red notice and i'm unable to get into the diagnostics menu. CAN network seems to work since i'm getting my menu items back in the dash which were missing since the old radio broke. had a split second of satic noise on startup from the FM radio as well.

i'll sort out the ground pin and then it's off to the dealer to see if they want/can unlock my radio.

leafspy does trow a evc-279 DTC, i will check all my pinning again before going to the dealer. But so far it's looking ok.

What i did notice was that my car is missing the pins for the TCU Tel pins, not sure if this is a model specefic thing. i can remotely control my HVAC etc so assume it has a TCU

I think i also figured out your extra PCB in the radio: https://zelemar.eu/nissan-can-filter-installation/
looks like it is indeed to bypass the vin coding. might be a plan B if unlocking via the dealer is not possible/to expensive
Wow, that is great!!! How did you get the pins out of the connector? Did you push them out with a tool or something? That's some Houdini stuff right there!

Based on my tests, the extra ground pin is unnecessary on the small connector, as there is continuity between the metal chassis of the display and that pin. So you can just run a cable from the chassis of the display to some ground point in the car. I ran it to the metal railing that the display assembly is screwed onto with the four screws. But hey - take it with a grain of salt - I'm the guy who managed to destroy their display.

As for the ignition cable that now needs to go from the big connector to the small connector, were you successful with that? It was so hard to tap into that pin on the small connector on my car that I was contemplating just running a cable directly onto the PCB of the display, bypassing the connector entirely.

EVC-279 indeed seems to be an error code received from the AV Control Unit.

As for the TCU pins, that is strange. Was your original unit with the 7" display? Not the 5" one? I am wondering if the TCU communicates via CANbus on your car. Not sure why it would do that though. Yours is 2018 right?

Great find with the Zelemar shop!! This looks to be exactly what was installed on mine. I was wondering how the previous owner was able to install this kind of microcontroller inside it, but it makes more sense now that it's an off-the-shelf preprogrammed PCB :D

I think the dealer should be able to get the display coded to your car, you just have to bring both keys with you. They charge for either 30 mins or 1 hour of labor at least here for the operation, 85 euros. So more expensive than the Zelemar CAN filter, however you might have to visit the dealer afterwards anyhow, if your new AV Control Unit wasn't in a Tekna previously. Do you happen to know the VIN of the car it came from in Lithuania? Wondering if with that you could check if it was a Tekna, and that thus there might be no need to involve the dealer.

As for my unit, it's completely toasted unfortunately. I have now decided that if you're able to get yours working with the 360° cameras, I'm buying another one and making another adapter cable from the ground up. Fingers crossed for you!! :D
drienties
Posts: 5
Joined: Tue Oct 04, 2022 6:25 am
Delivery Date: 04 Oct 2020

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

i'll take some pictures when i'm home. basicly on the front of both connectors there is a cover you can remove. then the second step is to undo the locking tab. for the small connector you can pry it upwards to unlock it. for the big one its a up/backwards sliding action.

After thats done, with a tiny screwdriver or pin you can push down the locking tab on the inside for the respective pin in pull it out from the back.

i followed the diagram (minus the missing TCU pins) and did not have any issues with pins not fitting.

One of the USB connectors on the back goes to the TCU i think, so i'm guessing its USB + CAN maybe. Mine is a 2018 Tekna.
I don't have any pictures on hand at the moment, but my old radio is one of these Image

Regarding the VIN lock, i decided to go straight for plan B and ordered the CAN filter, i will be mounting it externally and not inside the radio since the level for soldering on the SMD components on the inside is beyond my comfort level.

If i can get everything done without the dealer that would be a plus for me and everyone who want's to attempt this in the future. unfortunatly i do not know if the donor car was a tekna or not so i might have to get it recoded anyway.

Guessing by the LEAF parts partan has available i'm hoping it was a tekna they broke down, i'm seeing BOSE speakers and a auto park button available, but that's maybe just some wishfull thinking on my side :)
Last edited by drienties on Mon Oct 10, 2022 5:54 am, edited 1 time in total.
CeladonCityNPC
Posts: 51
Joined: Fri Apr 29, 2022 1:29 pm
Delivery Date: 15 Aug 2021

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

Alright, thanks a lot! I was looking at the original connectors and they looked like there was no way to unlock them, but good to know it is possible.

Mine was also a 2018 Tekna with the same display as in your photo. Really surprising Nissan would use two different types of TCU modules. Although now that I looked at the pinouts of the TCU module in mine, I don't see any pins clearly indicating that it would actually be connected to the headunit on mine either (with the exception of two "AUDIO HU OUT" pins). Unless the power is input into the TCU via the headunit. Otherwise there's just the CAN pins and microphone pins. So it could be that I don't have the TCU cables either, I just never took a look at the cabling since I was making an adapter and not switching the pins directly :D

External mounting for the CAN filter seems like a wise option, as the PCB mounting looked like daunting task for sure with not a lot of room for error.

Based on what you said it indeed seems likely your new display is from a Tekna as well.
Danep82
Posts: 14
Joined: Sun Mar 13, 2022 2:59 pm
Delivery Date: 05 Jan 2022

Re: Leaf ZE1 OEM headunit replacement (7" -> 8") Project Thread

I'm going to give this another try will keep you posted on how I get on!

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