Nanny tec almost killed me - Infiniti Q50 Forum
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post #1 of 17 (permalink) Old 11-12-2018, 08:34 AM Thread Starter
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Exclamation Nanny tec almost killed me

WOW, last night i was running late to a movie (Overlord). A car was going 39 in a 45, with very limited passing room. As I approached the passing lane and a car comming in the opposite direction(still enough room though. I hit it and approached the back of the offending car. Just as I swung into the opposing lane (floored and just double downshift in "Standard mode) the automatic forward collision intervention hit the brakes. My car sputtered, slowed down, then as I stomped it, it took off, then "Sensed the approaching car (I lost ground because the brakes applied) THEN my dash lit up with the check engine light, the warning triangle, the forward avoidance yellow symbol, the front of the car symbol turned yellow, and a warning stating there was a problem and to check the user manual "1/1"
I just made it, but was a little close. (had this crap not happened I would have had plenty of room to pass safely)
The car did not go into limp mode. The dash lights and warning panel remained all the way to the movie.
On restart all but the Check Engine light remained.

While driving home on a long deserted stretch of highway I used my bluetooth EcuTek phone app to read the code:"over boost detected" and it cleared it.
I suspect the sudded deceleration caused a boost spike as i had yet to reach the boost taper zone in my Ecutek tune when the nanny tec interfered.

This is effen DANGEROUS! AND I ad for the car, let alone to me, my passengers, and the oncoming car.
I will make a habitat of shutting TC off from now on, except in bad weather.


An aside since it was 27 deg F out..why does the ventilation n fan in AUTO switch from upper vent and floor vent to just floor vents? I had to manually choose both upper and lower vent circulation but then loose the automatic fan speed. What a PITA!! I ALSO went into climate and set the steering wheel heater to automatic yet it was off at 27 deg F on startup. Does any of that crap work or is it just me not doing something wrong? @Avedis53

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post #2 of 17 (permalink) Old 11-12-2018, 12:17 PM
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Concerning your heated steering wheel, does it heat when turned on manually? I'm assuming it was 27 deg F inside the car when you started it?

Have you checked the 10A fuse #36 in the fuse block-junction box located in the driver's side foot well?

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post #3 of 17 (permalink) Old 11-12-2018, 12:47 PM
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An aside since it was 27 deg F out..why does the ventilation n fan in AUTO switch from upper vent and floor vent to just floor vents? I had to manually choose both upper and lower vent circulation but then loose the automatic fan speed. What a PITA!!
This is the norm for auto climate. The idea behind it is hot air rises, so heater to floor. Cold air sinks, A/C to vents.

I don't like that changing where the air comes from turns off the auto climate. However, I drove a Dodge Ram 50 when I lived in Lake Tahoe that had no heat in the dead of winter... so I can't bring myself to complain too much, since the heater works. :P
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Yep... I actually said that.
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post #4 of 17 (permalink) Old 11-12-2018, 01:19 PM
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Man that's scary! Since this tech started coming out it's been a concern of mine that it would cause more harm than good in a quick maneuvering type of situation. Your story backs up that concern. The tech isn't smart enough to know the difference between a normal or an emergency type of situation. It seems that if the programming were to be refined the avoidance would cancel as soon as you hit the gas pedal but stay active if you started braking. This way you would have been clear and wouldn't have had an issue. But then again there might be other situations where that might cause an issue.

When driving there are thousands of different variables and situations all happening in different sequences. The nanny tech cannot account for everything so it can be dangerous at times. The vast number of variables is one reason that truly autonomous driving hasn't been successful yet. Machines still don't have the ability to adjust to every situation like the human brain can.

Instead of disabling VDC can't you just turn off front emergency braking? Isn't that what really caused the issue?


I'm glad that it didn't turn out differently for you.

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post #5 of 17 (permalink) Old 11-12-2018, 02:00 PM
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I experienced similar results when approaching a car rapidly with the intent of passing and the FEB would do its thing. It's certainly unnerving.

You can turn off FEB in the settings. Menu > Driver Assistance > Emergency Assist > Forward Emergency Braking.

FEB will be automatically turned back on when you start the car again. Disabling FEB will also disable PFCW (Predictive Forward Collision Warning).

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post #6 of 17 (permalink) Old 11-12-2018, 03:03 PM Thread Starter
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Originally Posted by Avedis53 View Post
Concerning your heated steering wheel, does it heat when turned on manually? I'm assuming it was 27 deg F inside the car when you started it?

Have you checked the 10A fuse #36 in the fuse block-junction box located in the driver's side foot well?
Yes, the steering wheel heats.. granted it times out, NBD. No, but oddly enough at lunch both seats the heat went on, and the steering wheel heat was on after starting the car.

It's Gremlins I tell ya.


I'm pretty sure the turbo over pressure was due to the activation of the forward collision avoidance/intervention and me mashing on the fuel to get the car to get up n go. A fast on n off demand of power that was against my desires. It freaked me out and my passenger thought it was me.


This is the single most dangerous "safety" feature of the Q. (For me). This will kill somebody someday. It's the second time it has caused a near miss for me. At least now I know what it is, and how to disable it. Unfortunately you can't pick n choose what is off or on. Id shut this off 90% of the time yet often want the traction control on. (But not always) I guess you get the bad with the good.

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post #7 of 17 (permalink) Old 11-12-2018, 04:57 PM
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FEB operates at speeds above 3 MPH. If the driver is handling the wheel, accelerating or braking, the FEB will function later or will not function.

The automatic braking will cease under the following conditions:

When the steering wheel is turned as far as necessary to avoid a collision.
When the accelerator pedal is depressed.
When there is no longer a vehicle detected ahead.

FEB also has a limitation where it will not function when there is a stationary vehicle in its path and your car is travelling greater than 45 MPH.

The first thing FEB does is to push the accelerator pedal up and if you release your foot from the pedal, then it will start with partial braking. If you continue to press on the accelerator pedal, FEB will be overridden.

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post #8 of 17 (permalink) Old 11-12-2018, 05:53 PM
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If you continue to press on the accelerator pedal, FEB will be overridden.
That cannot be reliable, then, as I have had several situations where FEB kicked in when I went to make a maneuver despite me remaining on the pedal. At least half a dozen times it continued braking until I disabled the traction control.

I can honestly say that I hate FEB on this vehicle; it is overly sensitive and unpredictable in my experience.

(I also loved that the ICC leaves such a large gap--even on the least sensitive setting--that I was constantly being cut off on the interstate; now I do not utilize the ICC or any of the technology features except cameras for an additional input when parking.)

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post #9 of 17 (permalink) Old 11-13-2018, 06:55 AM
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Originally Posted by JohnInNH View Post
WOW, last night i was running late to a movie (Overlord). A car was going 39 in a 45, with very limited passing room. As I approached the passing lane and a car comming in the opposite direction(still enough room though. I hit it and approached the back of the offending car. Just as I swung into the opposing lane (floored and just double downshift in "Standard mode) the automatic forward collision intervention hit the brakes. My car sputtered, slowed down, then as I stomped it, it took off, then "Sensed the approaching car (I lost ground because the brakes applied) THEN my dash lit up with the check engine light, the warning triangle, the forward avoidance yellow symbol, the front of the car symbol turned yellow, and a warning stating there was a problem and to check the user manual "1/1"
I just made it, but was a little close. (had this crap not happened I would have had plenty of room to pass safely)


I've always been able to mash the "go fast" pedal a little harder in the wife's XC90 in order to override the Volvo's version....your experience sounds like a nightmare! Fix this INFINITI!!!

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post #10 of 17 (permalink) Old 11-13-2018, 08:13 AM
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On the first few days of owning the Q50, I hated that pedal and FEB. Then I came to realize that the issue was my driving habit. I learned to be a safe driver overall - of course, I can still be a jack a$$ if I want to but more often than not, I decide against it as it'll take me a few extra steps to disable them.
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