Technical Hill Hold

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Technical Hill Hold

cazahra

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Just bought the last available FIAT 500X, hybrid and automatic. it immediately had gearbox problems after 350km and was at the dealership for 6 weeks. they replaced the box. got it back and i am struggling with the hill hold braking. i regularly park in a steep hill with very limited space. When i engage reverse (probably even drive) the engine needs to rev up past the 1500rpm for the brake to disengage, making it dangerous to hit the car behind, at the moment i am trying to avoid such parking spaces but with the limited parking spaces on the island, it does not make sense and considering the car is new, i need to resolve. Anyone experienced such an issue? what solution? the garage told me there should no issues. Far from it!
 
I've very occasionally experience similar with a manual box when on a hill with the 1000kg caravan attached.

The hill hodl / electric park (hand) brake are inter twined with stubbornness.

Often when on the level you engage gear, lift the clutch. press the accelerator and the EPB does not wan't to release. Being impatient you dip the clutch are try again. If you really put some drive on the EPB will eventaully release.

I don't like the "put some drive on" due to wearing the clutch out.

My general 1st solution is to:

o Go into neutral and press the brake pedal a couple of times and try again

Failing that:

o Press the brake pedal and manually release the EPB and then apply again

Failing that:

o Try normal method but in the opposite drive direction

Once or twice I've had to do a 'traditional' manual hand brake release where you pick up the revs and lift the clutch pedal timing the bite / hold and release the EPB. The trouble with this is that you have NO feel to where the bite / hold / release is and the EPB has no variable braking force. Doing that on a hill with a caravan attached is very scary as the EPB can take a full second to full engage if you start to roll. Normally a quick increase in revs & clutch drive will recover the roll but even then it is a bit of a lottery. Stalling is even worse.

ALWAYS when this happens keep you finger ready on the EPB and be prepare to rappidly apply the foot brake.

As you have an automatic then you could try the following.

o Apply the footbreak with your left foot
o Manually release the EPB
o Hold on footbrake and apply some revs
o Feather the footbrake and revs like a traditional hill start with a manual handbrake

Some technical info from the 500X eLearn/KeyLearn

EPB (Electronic Park Brake)
A button activates and deactivate the parking brake, thus eliminating the conventional system for
engaging the parking brake.
The button for the parking brake is located in the central tunnel.
The parking brake function is carried out by the ABS module.
Details below:
The system uses the switch on the central tunnel and two electromechanical actuators, each
installed on a rear brake caliper.
If the vehicle is in motion, pull up and hold the button to engage the parking brake for any
eventuality. The system will operate by increasing the hydraulic pressure.
If the vehicle is stationary, it is only necessary to pull the button upwards once to engage the
parking brake. To release the parking brake, press the brake pedal and press the parking
brake button downwards.
The Drive Away Release function automatically releases the electric parking brake if the seat
belt is fastened, a gear is engaged and the accelerator is pressed in order to move the
vehicle.
The Safe Hold function, when the vehicle speed is lower than 5 km/h, but not in Parking, and
the driver detection algorithm determines that the user is about to exit the vehicle, causes the
EPB to apply the parking brake to stop the vehicle safely.
The Auto Apply function, when the vehicle speed is lower than approximately 3 km/h and the
automatic transmission is set to parking, causes the EPM to apply the parking brake
automatically. With manual gearbox, the parking brake will engage automatically when the
ignition switch is set to OFF.
The status of the EPB functions can be configured in the dedicated Uconnect system menu.
 
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thanks S130, a bit complicated and risky, but willing to try anything. i thought it is my car only, but it seems to be a defect on these cars.
 
thanks S130, a bit complicated and risky, but willing to try anything. i thought it is my car only, but it seems to be a defect on these cars.
I'm not sure it is a defect but "just the way it is".

I've heard of other makes having similar automatic park brake systems release when you first want to get moving.

Just give me a traditional handbrake and let ME decide how to control the car.

It is really getting stupid with modern cars. Can nobody drive any more? :)
 
Mine (manual box) is also a PITA. I usually drive off using the hand-brake's "auto release" feature (when you lift the clutch slightly, it releases the handbrake, and off you go....) but occasionally it doesn't do it.

So.. you try again and that still doesn't work... so you have to step on the foot brake and release the handbrake manually, all while being honked at by the impatient guy behind you.. who is probably wondering why you started to "move".. but then stopped again and then put the brakes on. 😅.

The hill holder works whenever the car is on 15-degrees or more of slope... and that seems to work fine. On my manual, as I raise the clutch it holds the handbrake a bit longer then usual.. then releases it.

I used to try to drive through it (since I know how to do hill-starts) but it would hold on, then it would suddenly release and you'd be slung-shot up the road.. 🫣🚀 so I've learned to wait for it to release in its own time.

It's just <old moaner alert> another part of the trend of dumbing everything down. The handbrake is easily the most annoying feature of my car.


Ralf S.
 
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