2017 Toyota 86 Hill Assist
 

Hello,

I recently just bought a 2017 Toyota 86 and I turned on the HIll assist feature and the light is illuminated. However, whenever I park on a hill and try it, the car rolls back still? the hill isn't that steep its my drive way. But on another car the same drive way hill assist works.

Anyone know why its not working or activating?

I would love to hear details exactly how you "tried it".

Welcome, abn (airborne?) to our forum - :clap:

I don't have that feature on my car, so I can't be much help except to check the fuse.

I hope you get it figured out.

Just like in my 2017 Subaru wrx I put the car in first gear on the hill tap the brakes, and it would lock the brakes . This is how it is in my subie . When I parked the car on the hill put it in first tapped the brakes to see if it would lock, it wouldn't lock so I let go of the brake to see if it would roll, still rolled back.

Thanks man! Do you happen to know which fuse it is?

If the light is on it can't be the fuse.

The wording in the owner's manual implies that the hill start assist function doesn't press the brake for you, it holds the brake for you, acting more like a line lock than an automatic brake,

If you tried it in your driveway, did you just release the parking brake? You gotta give it the brakes for it to hold the brakes.

Yes on the hill my parking brake was not on. I put the car in first hold on the clutch and i would press the brake and let go a few times to see if it would roll back, when it did roll back i would just drive it up the driveway. It just seemed that it wasnt working like it didnt hold the brake.

Does it work on actual hills or roads steeper than your driveway?

I thought the hill assist didn't work on my BRZ initially until I tried the following steps:
1. Enabling the hill assist on a flat level road. Not sure if it makes a difference or if it calibrates the system, but worth a shot.
2. When you're waiting on a hill, clutch is out, car is in neutral, and brake pedal depressed. When you want to take off, brake still depressed, clutch IN, shift to first, then release brake, clutch out, and take off.

Not sure if it's just me, but the system didn't work when I released the brake before clutching in.

#2 here is how you _should_ be doing it. Not sure what you mean @abn about tapping the brakes??

I do pretty much exactly what NA said above. Car in neutral, ebrake up; I press the brake all the way, dis-engage e-brake (still in neutral); clutch in, shifter into first (brake still applied), start bringing your clutch foot up to slip the clutch as usual, start applying some gas as usual.

The thing I'll mention is that the Assist feature doesn't stay engaged very long. I'd say 2 seconds or so. So part of your issue could be you haven't learned the timing yet; this gave me some issues when I first started using it, because I wasn't "quick enough" at first and the Assist would dis-engage before I was slipping the clutch enough to start into 1st smoothly.

Does the car not give you like a stiffened pedal feel? Because by tapping the brake like in my subie, i put car in first gear tap the brakes and brakes stiffen like holds the brake for 3 seconds for me. For the 86 i dont fee the brakes stiffen at all

Nope. No change in feel whatsoever.

Strange, it does not hold the car at all. I tried it again, just rolled back right away. Maybe it doesn't detect the slope on my drive way? just strange another car detects it. I will try it on a larger hill maybe?

i just roll my foot while on the brake, rev to 3-4k, and while letting off the brake, dump the clutch and pin the throttle until it bounces at fuel cut.

what's the point of having a fun rwd car if i'm not letting everyone else know?!?

The feature is for my girlfriend, trying to learn how to drive stick shift.

I just opened the engine fuse box and noticed there are missing fuses in the car, anyone know which fuses is linked to the HAC?

None, it exists as software in the stability control system.

seems like she could teach you some things!

Does that mean software in my car, isnt working?

If there is no abs or esp warning light lit, if the hill start assist light is on, the system should be working, unless you've got a super rare software issue no one has ever heard of.

I am not sure theres no lights on except for hill assist light. I bought the car from someone else and its a salvage title?

Could issue be the floor i turned on the hill assist was not “flat” enough?

Look, I just went out, enabled it on my car and went for a test drive.

Little green car on a hill top left of the dash, no other warning lights.

https://i.imgur.com/JktWsqr.jpg

Hold the brake on a hill and let go? you roll down the hill. Holding the brake, press in the clutch, little green car starts to blink fast, you are now held on the hill, release the brake, select first, and off you go.

https://youtu.be/bwyI4Opk_9k

I don't know how much the the level, or lack thereof, of the car affect the system if you enable it while parked on a hill, I enabled mine in my parking spot, on level ground.

Well now, THAT was right nice of you - :thumbsup:

Thinking further,

If the light is on and it isnt engaging, it may just lack the trigger to engage... your car starts, so we know the clutch switch works. That leaves only the brake switch.

Check that the stop lamps illuminate correctly.

The stop lamps are working! Im gonna try it on a steeper hill later today

I appreciate you doing that for me. I turned it on in my garage on a level floor. Ima try ot on a steepeer hill later

I just wanted to update! It worked only a steeper hill. Strange how it didnt work on my drive way or another hill or a speed bump that always activates on my wrx. But did work on a very steep hill

Interesting, the green car icon doesn't blink on my Series.Yellow BRZ, but the feature still works on steeper hills.

I wonder if there's a difference between Toyota and Subaru in that regard.

Same here, no blinking. :iono:

To be fair, while driving around looking for a place out of the way to whip my phone out and shoot (that was in a cul-de-sac), I initially tried it in a loading dock ramp and it wasn't steep enough, it wasn't a particularly steep one though.

Mine just blinked fast for a second and then went solid. The blink just means it turned on. I then immediately turned it off again since I have no need for it even on the steepest of hills.

The icon should go away after a while, and turn on when engaging. Why do I have to drive with an annoying unuseful icon on the speedo?