CRBAman
Posts: 6
Joined: Sat Nov 28, 2015 3:33 pm
Delivery Date: 28 Nov 2015

start A/C with CAN BUS

Wed Dec 07, 2016 2:16 am

Hello!

Maybe somebody knows what code need to sent to EV/CAN bus to start heater or cooler like it does with Nissan Connect?

I want to start A/C when car is switched off.
Nissan leaf SV 2013, Ukraine
SimpleEvse 6.6kWh

mentaluproar
Posts: 4
Joined: Tue Jan 05, 2016 11:22 am
Delivery Date: 09 Jan 2015

Re: start A/C with CAN BUS

Fri Dec 09, 2016 4:12 pm

This is exactly what I'm looking to do. There must be some way to trigger the remote start via OBD.

carrott
Posts: 1
Joined: Tue Jan 03, 2017 2:53 pm
Delivery Date: 03 Feb 2015

Re: start A/C with CAN BUS

Tue Jan 03, 2017 3:12 pm

You can wake the car up and start the climate control by sending a frame or two on the EV CAN bus, see https://github.com/openvehicles/Open-Vehicle-Monitoring-System/blob/470af78c4b9315da0062d2fa2bc5d3fdd7561822/vehicle/OVMS.X/vehicle_nissanleaf.c#L405 which implements remote climate control in the OVMS project.

Gen 1 cars require a wire to be toggled to 12v to wake up the system before you can send the climate control command. I unplugged the TCU on my Gen 1 Leaf and connected the OVMS to it's plug to access the EV system activation request signal. See https://carrott.org/blog/archives/158-OVMS-Nissan-Leaf-Remote-Climate-Control.html

I've had a report that a Gen 1 car doesn't need the EV system activation request signal, so maybe there are some Gen 1 firmware versions that implement the pure CAN bus wakeup that is present in the Gen 2. I haven't tested many Gen 2 cars, but I have found that not all Gen 2 cars work -- I suspect cars with a TCU installed don't work because the OVMS sends "turn on" and the Nissan TCU sends "idle" but I haven't had a chance to test this.

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