Hill Holder/Hill Let-er-roller!

[KMX3060]

I just had to try the hill holder system today.

Came up my driveway which is about 18 deg and stopped.

When I took my foot off the brake the hill holder went off and the truck stayed for about 10 seconds.

Then it rolled back about three feet and stopped again for about another 10 seconds and then it rolled back again.

Then the hill holder tired to stop again and the engine stopped, the batt and check engine light went on and I had to put on the brake to keep from rolling down the hill.

Kind of a funny "Hill Holder"
:awais:

 

[tcpoob]

are you referring to the Hill Start Assist feature? From what I heard, it doesnt seem to be very useful at all. Does someone have good experience with this feature - and exactly how the vehicles behave going uphill after a stop with the feature and without it - from your experience testing it, not just what Toyota says?

 

[TRD04RUNNER]

hahah lol the Hill Start Assist feature is not for holding your 4R for a long period of time (5sec max I think). it only hold the 4R long enough to take your foot off the bake to hit the gas when you are at a dead stop on a slop. so don't mistake it for slop brake! lol

 

[KMX3060]

My old '86 Mercedes had a hill holder system and it would stay right where it was for ever.

I guess if it is a hill assist system then 5-10 seconds is all we can expect.

By the way, it is slope with an 'e'. Slop is when you feed the pigs.

 

[TranceKrayz]

if you want a hill holder.......use your e-brake.......:arrow:

 

[jharris2]

You might want to check out this thread where HAC was discussed at length.

 

[tcpoob]

You might want to check out this thread where HAC was discussed at length.

excellent pointer, thx.

 

[RickyCRX]

I've noticed a couple of times now where I'm on a good uphill and take my foot off the brake, the 4Runner doesn't seem to want to stay where it's at. It will try to creep backwards. I thought there was supposed to be a sprag on automatic transmissions to stop the vehicle from rolling in the opposite direction as the gear the vehicle is in??

My S10 Blazer will not roll backwards while in D no matter how steep the hill is (well, as long as it's not sliding backwards).

Ricky

 

[Sac State]

if you want a hill holder.......use your e-brake.......:arrow:

Hell, my ebrake won't even hold my rig on a flat surface. It has been adjusted three times.

I must say the brakes on this generation are the worst brakes in terms of noise, inability to hold (ebrake) and squeeking that I have ever encountered. They stop alright, but sound like crappo.

I wish I had drums on the back.

 

[Expat]

Hell, my ebrake won't even hold my rig on a flat surface. It has been adjusted three times.

I must say the brakes on this generation are the worst brakes in terms of noise, inability to hold (ebrake) and squeeking that I have ever encountered. They stop alright, but sound like crappo.

I wish I had drums on the back.

:iagree:

I also find the Hill assist pretty useless and just plain annoying really.

 

[Thai]

I wish I had drums on the back.

The silver lining is that with drum brakes, you have to worry about them everytime you do water crossing or take it deep mudding.

 

[mikel]

I just had to try the hill holder system today.

Came up my driveway which is about 18 deg and stopped.

When I took my foot off the brake the hill holder went off and the truck stayed for about 10 seconds.

Then it rolled back about three feet and stopped again for about another 10 seconds and then it rolled back again.

Then the hill holder tired to stop again and the engine stopped, the batt and check engine light went on and I had to put on the brake to keep from rolling down the hill.

Kind of a funny "Hill Holder"
:awais:

This was EXACTLY my experience tonite ! I was out testing the HAC on some little hilly street near home just to get the feel of what it is and what it does. I deliberately let it roll backwards and let the HAC do it's thing. Sounded like my engine was going to fall apart, SPRAINGING SPROINGING TWANGING ..... THEN CLICK CLICK CLICK as it let it roll backward again. After kicking in the 2nd or 3rd time, THE ENGINE QUIT AND ALL THE CHECK LIGHTS CAME ON. I was SHOCKED !! WHY DID THE ENGINE STOP ?

It took a coupla key turns to get it started again .... I tried the same exercise a 2nd time, THE ENGINE DIED AGAIN !! WTF ?? IS THIS THE WAY IT'S SUPPOSED TO WORK ? WHY WOULD THE ENGINE STOP ?? Took a bit of cranking this time to get it started again.

Is this the default behavior, to kill the engine after some point - that to me is extremely dangerous cause you lose all power and the only recourse is manual braking and/or e-brake. I wonder if this is a computer bug ?

I urge others to at least get familiar with the HAC and DAC (same noises) so they don't scare the sh*t out of you like it did when I tested them the first time.

Mike

 

[Thai]

Noise? Normal. You will hear the same racket when off-roading. ATRAC makes the same noise...scary at first, but you get used to it.

Engine shutting down?? Maybe it's to prevent overheating the brakes or overfrying your brake fluid??

Repeated cranking to get your engine to start?? That's strange...not sure why.

Good luck.

 

[Koz]

The "Hill Start Assist Control" works exactly the way it was designed to work. It was designed to assist you on starting on a hill, not hold you there. The 10 sec of pulsing the brakes is more then enough time to move your foot from the brake to the throttle. If you are on dirt or a slippery slop you would not want the brakes to lock, you would slide back or to the side. That

 

[sharp4runr]

Engine stalling??? Is this the toyota automatic version of stalling on a hill with a 5speed?

 

[boston_kevin]

how much gas did you have in the tank? If you were near empty, the pump might have pulled in a little air since the pump sits in the tank (not sure if the fuel inlet is in the front or the back of the tank).
That might also explain the difficulty starting... I have never had this problem, and I have been on grades steeper than 20% (going straight up). Hill Start Assist worked great in the dirt and sand going up the hill.

 

[mikel]

I had maybe 1/8 of a tank of gas, wasn't a particularly steep hill, just enough to engage the HAC.

Hmmmmm, the brake noise and related I understand, though don't know why it has to be so dang noisy ? Maybe to make sure you know it's happening ?

The engine quiting like it did 2X is what disturbs me .... that's down right dangerous. I'll try it again when I fill up the tank and report back.

If anyone else here can try out this experiment, I'd like to confirm, along with the first guy in the thread, if this is the normal behavior (engine quiting).

 

[olliebear]

Try HAC in San Francisco!

Great stuff.

Try stopping up hill for a light wiht traffic behind you. Take foot on brake and go to gas before the car rolls backwards again.

It's not to hold the car for longer than it takes for the nut behind the wheel to PUT FOOT ON GAS.

AWD? Great stuff. Try driving in San Fran in the rain when One set of wheels have to roll over slippery steel plates that cover the underground access into the cable car system. I could feel the AWD and torsen system grip and move the 4Runner in stable, controlled manner up and down.

Those damned cobble stone paving isn't any help either, espeically when wet with dew or rain.

I have not yet tried using DAC going down Lombard Street --(The crookidest street in the world that starts on top of Russian Hill)

You don't have to roll aorund the Rubicon to use the 4Runner's safety features.

I just hate driving in SF. Just hate it. Just hate it. just hate it.

Glad I am not doing it in my 5.0 Mustang 5 speed anymore.