ravi100
Posts: 20
Joined: Mon Mar 28, 2011 6:34 am
Delivery Date: 16 Sep 2011
Location: Southlake TX

Navi safety override?

Mon May 09, 2011 5:57 pm

Has anyone figured out a way to disable the Navi system safety override that prevents you from using it while moving? I hate that feature when a passenger could easily operate the system but is not allowed to.

GroundLoop
Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: Navi safety override?

Mon May 16, 2011 10:08 pm

I agree. I haven't dug into the pinouts in the service manual yet, but there might be a signal to the head unit that the car is in "Park", much like the one for Reverse. Hopefully that's not moved to CANbus.

There might be a wheel rotation signal that can be interrupted as well -- effectively making the nav think the car has stopped, until GPS convinces it otherwise.

palmermd
Posts: 2434
Joined: Fri Apr 23, 2010 3:19 pm
Delivery Date: 31 Mar 2011
Leaf Number: 1100011011
Location: Hermosa Beach, CA

Re: Navi safety override?

Mon May 16, 2011 10:16 pm

GroundLoop wrote:I agree. I haven't dug into the pinouts in the service manual yet, but there might be a signal to the head unit that the car is in "Park", much like the one for Reverse. Hopefully that's not moved to CANbus.

There might be a wheel rotation signal that can be interrupted as well -- effectively making the nav think the car has stopped, until GPS convinces it otherwise.


It is definitely not related to Park. It becomes enabled when you stop at a traffic light, and then disables again once you start moving. Not sure how the motion signal gets to the unit, but it is definitely motion related not gear selector/Park.
Michael

Leaf since 31 March 2011
Driving electric since 1996


First Bar Loss
Second Bar Loss
Third Bar Loss

User avatar
TomT
Posts: 10565
Joined: Sun Aug 08, 2010 12:09 pm
Delivery Date: 01 Mar 2011
Leaf Number: 000360
Location: Foothills of Granada Hills, CA
Contact: Website

Re: Navi safety override?

Mon May 16, 2011 10:55 pm

It uses the vehicle speed signal and disables above 5 MPH.

palmermd wrote:It is definitely not related to Park. It becomes enabled when you stop at a traffic light, and then disables again once you start moving. Not sure how the motion signal gets to the unit, but it is definitely motion related not gear selector/Park.
59,991 miles/12 bars/289 Gids/68.54 AHr/101% SOH/101.64% Hx 7May15 w/ new Lizard (barely made the warranty).
71,770 miles/12 bars/256 Gids/59.04 AHr/88% SOH/87.92% Hx 3Mar16 at lease return.

Now driving a 2016 Volt Premier. Model 3 reserved.

TEG
Posts: 1388
Joined: Thu Jun 10, 2010 8:43 pm

Re: Navi safety override?

Mon May 16, 2011 11:02 pm

Is the vehicle speed signal a single wire that can be tapped into?

I found one on my wife's Highlander and put a switch inline so you can disable the signal while in motion and get temporary access to nav input. But the GPS gets a bit confused if you leave it off so you can't leave it disabled for long.

DarkStar
Posts: 2066
Joined: Sat Jul 17, 2010 10:06 am
Delivery Date: 25 Mar 2011
Leaf Number: 568
Location: Hillsboro, Oregon, USA
Contact: Website

Re: Navi safety override?

Tue May 17, 2011 8:52 am

TEG wrote:Is the vehicle speed signal a single wire that can be tapped into?

I found one on my wife's Highlander and put a switch inline so you can disable the signal while in motion and get temporary access to nav input. But the GPS gets a bit confused if you leave it off so you can't leave it disabled for long.

It's all in the CAN-bus, however maybe a false speed signal could be sent to the navigation system... Hmm...
Mikiko (2011 Nissan LEAF ETEC) Status:
Reserved: 04/20/10 | Ordered: 10/01/10 | EV Project Blink Installed: 03/22/11 | Delivered: 03/25/11 | VIN: 568

Oregon Electric Vehicle Association | Electric Auto Association

GroundLoop
Posts: 1725
Joined: Mon Sep 13, 2010 9:31 pm

Re: Navi safety override?

Fri May 27, 2011 10:06 pm

DarkStar wrote:It's all in the CAN-bus, however maybe a false speed signal could be sent to the navigation system... Hmm...


Nope, not on CANBus.. the Nav uses Pin 28(GR) to sense the wheel speed, and confirms/calibrates with GPS.

Try disconnecting 28. :)

drmanny3
Posts: 79
Joined: Mon May 30, 2011 6:08 am
Delivery Date: 28 May 2011
Leaf Number: 3297
Contact: Website

Re: Navi safety override?

Sun Jun 05, 2011 11:44 am

I definetly want to defeat this system. We did so on our 2005 Prius (required that you enter software diagnostics) Then in 2006 Toyota reversed engineered that method. Then a company introduced a plug in device that electronically says ok at the sign on screen and then temporarily stops the signal showing the car's movement. It allows the use of the screen for about 10 seconds and then lets go. You must wait another few seconds and then the screen comes back and you can continue to enter your destination. Toyota felt that one could use the voice activated system but it never really worked once you were driving. So I hope as our numbers pick up that someone out there will make a add on piece. As for the phone I was able to put a on off switch on one of the speed wires and that allows me to use the phone any time. I would imagine that will also be available on the leaf.
Manny

QueenBee
Posts: 1564
Joined: Sun Aug 08, 2010 5:14 pm
Delivery Date: 20 Jun 2011
Leaf Number: 2062
Location: Bellevue (Seattle), WA

Re: Navi safety override?

Thu Mar 15, 2012 6:58 pm

So has anyone tried this yet to see if the navigation also uses the GPS to detect movement?

User avatar
LTLFTcomposite
Posts: 4335
Joined: Fri Apr 23, 2010 6:06 pm
Delivery Date: 10 Dec 2011
Leaf Number: 5926
Location: Boca Raton FL

Re: Navi safety override?

Thu Mar 15, 2012 7:11 pm

They should at least AND that condition together with the weight sensor that disables the passenger airbag. Of course if the passenger seat is occupied you probably don't need the navigation system to tell you what to do.
LTL
White 2012 SV delivered 10 Dec 2011 returned 25 Nov 2014 replaced with stopgap ICE Sentra
[35 months] [35K miles] [9 Bars]
2013 Volt replaced after 36 months/30k miles with ICE Rogue

Return to “Music / Navigation / Handsfree”