Hello,
I've been using the OVMS module and it's been working great. Everything works as it should except for one thing, the microphone. After unplugging the TCU, the microphone no longer works. If I re-plug the TCU, the microphone works fine again. I have a Nissan Leaf 2016 (AZE0-1 model) where the TCU needs to be unplugged if I want to use the remote climate control. I've read around and it appears the microphone issue does not exist on the AZE0-2 model as these models Nissan moved the TCU "from the EV CAN bus to the CAR CAN bus".
Has the microphone bug been fixed on the AZE0-1 models...or is planned on being fixed? Right now there's a bit of a trade-off between having the microphone working or a having the remote climate control working. Both are really nice conveniences, especially in Canada.
If there's no planned fixed, is there anything I can do? Perhaps remove the offending wire(s) from the TCU wire harness that is affecting the microphone or remote climate control?
I know this been mentioned in other posts such as : https://www.openvehicles.com/node/3054 where the voice recognition is the issue but it seems like the microphone in general is the problem. I can make and receive calls. However, I can hear the individual on the other end of the call but they cannot hear me.
Does the microphone only function through the CAN-Bus data lines or is there a dedicated wire? Would appreciate any type of help, thanks.
Thank you,
~Adam
This is for a US 2017 SL with premium. The 2016 should be pretty similar, but it's a good idea to obtain the wiring diagram yourself and verify. Your local library may have a subscription to "Auto Repair Source" or something similar, which should have it.
https://imgur.com/a/TmG89GT
The microphone connects to the TCU on pins 16-18. The microphone output to the AV control unit is on pins 11-12. I don't recall if the microphone signal is amplified/buffered or just passes straight through, but the TCU does provide power to the microphone, so you can't simply remove the TCU and connect the mic signal lines together. To prevent the TCU from turning climate control off when it finds it has unexpectedly started, "simply" disconnect the CAN lines at pins 6-7 and leave everything else connected. I managed to figure out how to de-pin the connector with makeshift tools while hanging upside in the footwell, but ideally you would get the proper de-pinning tool and practice using it on a spare connector.
Thanks so much for this! I'll give this a try over the holidays and report back. Appreciate the help and diagrams!