Hill Start Assist ?

[Scottish Guy]

I've not noticed it working to be honest, that's not saying it is faulty.

Is there a minimum incline that it starts working ? because it does roll back when you put it in D on
very modest hills until the forward drive picks it up.

There's no option for it to be turned On or Off in the settings menu.

HAC is on the specs for the Euro models but with the well know quirkiness of Hyundai I wonder
if it hasn't been fitted or maybe not been activated.

 

[EdP]

Is there a minimum incline that it starts working ? because it does roll back when you put it in D on
very modest hills until the forward drive picks it up.

There's no option for it to be turned On or Off in the settings menu.

HAC is on the specs for the Euro models but with the well know quirkiness of Hyundai I wonder
if it hasn't been fitted or maybe not been activated.

Your version may be different. Is there a button on the consul for Auto Hold? It is to the right of Drive Mode on US cars. When turned on, it lights on the dash in white. Put the brakes on and when activated it turns green and locks the brakes until you press the gas pedal.

 

[Scottish Guy]

Yeah, that's Auto Hold, I got that.

The book says :

HAC [ if fitted ]

" The Hill-start Assist Control [HAC]
prevents the car from rolling
backwards when starting a vehicle
from a stop on a hill. The system
operates the brakes automatically
for approximately 2 seconds and
releases the brakes when the
accelerator pedal is depressed or
after 2 seconds "

Just wondered if the USA 15-17 Genesis or the current G80 has it fitted.

Again, I've had the car 9 months and I just come across it in the Manual

 

[EdP]

Yeah, that's Auto Hold, I got that.

The book says :

HAC [ if fitted ]

" The Hill-start Assist Control [HAC]
prevents the car from rolling
backwards when starting a vehicle
from a stop on a hill. The system
operates the brakes automatically
for approximately 2 seconds and
releases the brakes when the
accelerator pedal is depressed or
after 2 seconds "

Just wondered if the USA 15-17 Genesis or the current G80 has it fitted.

Sounds like what is used for years on some cars with manual transmission. I don't see any advantage over the AutoHold and would be redundant. No mention of hill hold in the manual.

 

[Mcc]

Sounds like what is used for years on some cars with manual transmission. I don't see any advantage over the AutoHold and would be redundant. No mention of hill hold in the manual.

I guess what I would call significant differences are that Auto Hold keeps the car from creeping forward and needs to be manually turned on every time you start the car (at least on my model) while HAC does not on either point.

 

[SuperKing]

I've noticed that if I don't fully stop going up a hill, the car will roll back. If I fully stop, it won't roll. My auto hold is not on, I never use it.

 

[EdP]

I've noticed that if I don't fully stop going up a hill, the car will roll back. If I fully stop, it won't roll. My auto hold is not on, I never use it.

Auto Hold is one of my favorite features. Makes it easier on the legs if you have a lot of stops or long stops stuck in traffic. Try it, you might like it.

 

[SuperKing]

Auto Hold is one of my favorite features. Makes it easier on the legs if you have a lot of stops or long stops stuck in traffic. Try it, you might like it.

Yeah, I know it has its uses but I just don't like how it's implemented in the Genesis. I drive in a lot of stop and go traffic so I like to have the car creep from a stop when I let go of the pedal. I prefer the Merc implementation of it. It's always on but it's not engaged until you hit the brake pedal all the way to the floor.

 

[Starflyer]

Auto Hold is one of my favorite features. Makes it easier on the legs if you have a lot of stops or long stops stuck in traffic. Try it, you might like it.

One of my favorites also although I still monitor it closely on steeper grades. Would hate for it to roll back into another vehicle. On mine, it doesn't engage until I come to a complete stop with the brakes. For some reason it only works on a uphill grade. Very smooth transition when I apply a little gas when I'm ready to move.

 

[EdP]

I drive in a lot of stop and go traffic so I like to have the car creep from a stop when I let go of the pedal. I prefer the Merc implementation of it. It's always on but it's not engaged until you hit the brake pedal all the way to the floor.

Try it again. You can do just that if you are gentle on the brake it will not engage. Watch the dash light.

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[Scottish Guy]

Try it again. You can do just that if you are gentle on the brake it will not engage. Watch the dash light.

Indeed, I find it works very well, you have to give a definite dab of the pedal to get it to engage, subtle pedal pressure is not enough, it's well calibrated .

 

[SuperKing]

I've used it many times, I just don't like it. Another scenario is parallel parking on a downhill slope. After you've backed into the spot, you lock the brakes, put the car back into drive... but the car won't roll forwards when you ease off the brakes. Need to tap the throttle to release the brakes and quickly get back on the brakes to prevent yourself from rolling into the car in front of you or into the curb. Hit the brake pedal too hard and you locked the brakes again.

I didn't want to keep track of all the scenarios where I need to turn it off so I opted to not turn it on. Traffic lights aren't long enough to bother me and if I'm waiting for a train to cross, I'll probably have the car in park anyways. That said, if it was implemented like the Mercedes system, I'd probably use it more. Like the throttle pedal's kickdown switch, the brake pedal also two stop points. The first one fully engages the brakes, the one past that engages the auto hold. I find the Genesis system to get in the way more often than being useful.

 

[Mr. Incredible]

Yeah, I know it has its uses but I just don't like how it's implemented in the Genesis. I drive in a lot of stop and go traffic so I like to have the car creep from a stop when I let go of the pedal. I prefer the Merc implementation of it. It's always on but it's not engaged until you hit the brake pedal all the way to the floor.

from my experience, the auto-hold does not engage immediately upon stop, unless you add additional pressure to the pedal after you stop, so yes you can creep along. It will engage at some point after a full stop, but it is not immediate, it appears to be about 5-7 seconds.

I use the auto hold, but am able to creep along in stop and go traffic without it ever engaging unless I add additional pressure after the stop.

 

[SuperKing]

I know it does, it's just not easy to tell where the threshold is before it engages. On the Mercs there's a tactile click in the pedal to let you know you've engaged it. Besides, if I'm going to drive it right on the threshold so it doesn't come on then why turn it on?

 

[Scottish Guy]

Obviously Hyundai's idea of a hill is different to mine.

After a few experiments in my hilly town, the HAC does work, but only on fairly steep roads.

On my old 300C the HAC worked on any incline.

 

[Mr. Incredible]

I know it does, it's just not easy to tell where the threshold is before it engages. On the Mercs there's a tactile click in the pedal to let you know you've engaged it. Besides, if I'm going to drive it right on the threshold so it doesn't come on then why turn it on?

depends on your circumstances. it is a god-send for me.. I shattered my pelvis and right hip in a motorcycle accident several years back, sitting at a red light with pressure on the brake is very uncomfortable for me most of the time and down right painful for me at other times, especially in cold weather.

in my last 2 cars without auto hold, I was shifting into neutral at most red lights, sometimes neutral and parking brake if there was an incline, going into park isn't really an option because of the lag between going from park to drive and being able to accelerate without the a-hole behind you honking because the light turned green 1/100th of a second ago.

Auto hold is one of the best features (IMO) to come out in recent years, as it makes my drive a lot less painful.