Parts of the following details for remote climate control
can be found in the OVMS support section (link in first post) for the Nissan Leaf.
The TCU is located behind the glove box on LHD cars or on the right hand side of the drivers foot well on RHD cars. Before removal/unplugging any of the 3 connectors, you should either/or:
- disconnect the 12v battery
- pull TCU fuse #34 in fuse block E4 (and replace when finished)
Push down the tab in the middle of each connector to disconnect from the TCU.
2011-2012 models (ZE0)
These model years require a hardware modification to enable remote climate control if the vehicle is not plugged in and charging
. If you want to to enable remote climate control once the charge has finished
, or if the vehicle is not plugged in
, you need to perform the following hardware modification: connect TCU pin #11 to pin #1 (12v) on the large white connector to generate the “EV System Activation Request Signal” (additional details at end of this post).
2013-2016 models (AZE0)
These model years require the TCU to be unplugged completely
Unplugging the TCU will disable CarWings/NissanConnectEV features (including the mobile app). All other car functions will not
be effected (e.g GPS/maps/radio/Bluetooth/microphone all work the same as before). The TCU can be plugged back in at any point in the future if required. If you prefer not to unplug the TCU, all OVMS functions apart from remote climate control
will function just fine alongside the existing TCU.
2016-2017 models (AZE0)
Remote climate control will only work when plugged in and actively charging
on 2016-2017 models. This is because in 2016 Nissan moved the TCU from the EV CAN bus to the CAR CAN bus.
some of the following tips (for the ZE0) require use of special tools
(like solder/de-solder guns) and may not be for everyone!
I repurposed the large white 40 pin connector on the TCU (after removing the entire unit) as follows:
- remove/expose the TCU PCB from the metal case/bracket
- extract the connector from the PCB (either by de-soldering or cutting the pins close to the connector)
- solder a jumper wire from pin #11 to pin #1 on the outside of the connector
Now you can mate the connector to the remaining TCU harness (which pulls pin #11 "high") when you want to enable remote climate control. I removed the (unused) light in my glove box and routed the TCU harness connector through that hole...so I can plug the modified connector into it when I want use remote climate control.
leaving this modification in place permanently (which pulls pin #11 "high") will kill your 12v battery
in a matter of hours...so just do it when you are going out somewhere and you know you want to use remote climate control.
the following tips for using remote climate control apply to all Gen1 Leaf types.
- you can use the Homelink button in the "Car" screen of the app, but it's not easy to tell what "mode" you are in [on/off]
- it is much better to enter the climatecontrol [on/off] command in the "Messages" screen of the app