Brake Pedal Fail When Cornering - Australia

[BrisbaneDefender]

Hey All, just thought I'd ask if anyone else has issue with their brake pedals when turning? So I was driving along in the road and decided that I wanted to turn right into a small street, hard brake and turned wheels to right and brake pedal gave way for a split second and then recovered. Each time this has happened since it makes a clicking sound when it happens, just recently it happened travelling slowly when I made a quick right turn on a roundabout. This fail has been frequent and scare the crap out of me every time. It has never happened without wheels being turned. Can anyone help?

 

[CRH]

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Hey All, just thought I'd ask if anyone else has issue with their brake pedals when turning? So I was driving along in the road and decided that I wanted to turn right into a small street, hard brake and turned wheels to right and brake pedal gave way for a split second and then recovered. Each time this has happened since it makes a clicking sound when it happens, just recently it happened travelling slowly when I made a quick right turn on a roundabout. This fail has been frequent and scare the crap out of me every time. It has never happened without wheels being turned. Can anyone help?

Where's your nearest dealer, have you contacted them? I wouldn't be happy driving with that, for my safety or others, even cyclists! (joking)

 

[TelRidan]

Pretty sure this is the poor excuse for traction control. I get it pretty often myself and can see the warning light up on the panel. It is truly a major annoyance as I have never felt in danger of tipping or slipping UNTIL the traction control kicks in.

 

[Clark Kent]

I think I have felt this one time under the same sharp turn then brake scenario. I wasn't sure it even happened but it felt like the brake pedal had momentarily disconnected. My gut says it's a conflict between ESC and TC in a paper-scissors-rock contest for who is intervening first. Meanwhile, the brakes go squishy. It's unsettling.

 

[Shopkeep]

Hey All, just thought I'd ask if anyone else has issue with their brake pedals when turning? So I was driving along in the road and decided that I wanted to turn right into a small street, hard brake and turned wheels to right and brake pedal gave way for a split second and then recovered. Each time this has happened since it makes a clicking sound when it happens, just recently it happened travelling slowly when I made a quick right turn on a roundabout. This fail has been frequent and scare the crap out of me every time. It has never happened without wheels being turned. Can anyone help?

Has happened to me a few times under similar circumstances, I put it down to ABS kicking in due to weight shift to outside from inside front wheel. My Grenadier is a daily driver and every day I do a tight fast right U turn across three lanes of traffic followed by a sharp left and it can happen if rushed. Seemed to occur more when I had KO2s fitted, now running Kumho AT52s which have much better road traction and does not seem to happen.

 

[Clark Kent]

Has happened to me a few times under similar circumstances, I put it down to ABS kicking in due to weight shift to outside from inside front wheel. My Grenadier is a daily driver and every day I do a tight fast right U turn across three lanes of traffic followed by a sharp left and it can happen if rushed. Seemed to occur more when I had KO2s fitted, now running Kumho AT52s which have much better road traction and does not seem to happen.

The tyre change is interesting. Does the Kumho have a stiffer sidewall or a lower profile? The yaw and roll rate might have reduced a bit on the Kumhos

 

[Shopkeep]

The tyre change is interesting. Does the Kumho have a stiffer sidewall or a lower profile? The yaw and roll rate might have reduced a bit on the Kumhos

Higher profile, went from 265/70R17 K02 to 285/70R17 AT52s. The AT52s don't heat up anywhere near as much as the K02s did so maybe stiffer sidewalls, I don't get the over temp warnings on freeways anymore. Big difference in on road handling and braking performance, especially in the wet (as in much improved).

 

[Tazzieman]

TIlt/yaw sensors, working or faulty can cause appatent havoc with braking, even in a straight line.
All sensors need reading with the appropriate tester.
Even then it might be "normal" behaviour for how the vehicle is setup.
It's not a Toyota!

 

[BrisbaneDefender]

Thanks to all whom has responded, Expedition HQ in Qld are doing everything they can to assist me. Those guys are awesome down there and I am just looking for ways to assist in finding out what the issue could be. I also have what appears to be a noisy driveshaft which I believe is a common fault, with some vehicles being sold with play in the shaft. Thanks again and any feedback helps

 

[Clark Kent]

Higher profile, went from 265/70R17 K02 to 285/70R17 AT52s. The AT52s don't heat up anywhere near as much as the K02s did so maybe stiffer sidewalls, I don't get the over temp warnings on freeways anymore. Big difference in on road handling and braking performance, especially in the wet (as in much improved).

Assuming you're running the same cold pressure, that does sound like stiffer sidewalls. The K02 and the AT52 have the same load rating. The K02 has a 3-ply sidewall. I can't find the AT52 sidewall specs.
Anyway, it's academic but interesting to see that tyres may have made a difference.

 

[CRH]

If I recall rightly, the automotive press reviewers of the new shape Jimny reported a similar issue when taking fast corners. Can't remember if Suzuki adjusted anything or it was just a case of it being that type of vehicle that needed early intervention?

 

[255/85]

Higher profile, went from 265/70R17 K02 to 285/70R17 AT52s. The AT52s don't heat up anywhere near as much as the K02s did so maybe stiffer sidewalls, I don't get the over temp warnings on freeways anymore. Big difference in on road handling and braking performance, especially in the wet (as in much improved).

Soft sidewalls would allow the effective rolling diameter to change during hard cornering. Maybe the Kumhos have a harder tread compound on top of the stiffer sidewall?

I haven't noticed anything yet with the OEM Bridgestones but they're rock hard. The dealership set them at 42psi front and 45pai rear twice now - way too much for an unloaded vehicle imo.

 

[Steve.B]

TIlt/yaw sensors, working or faulty can cause appatent havoc with braking, even in a straight line.
All sensors need reading with the appropriate tester.
Even then it might be "normal" behaviour for how the vehicle is setup.
It's not a Toyota!

Is that a reference to the previous shape and the current shape Toyota Hilux failing the moose test.

 

[Tazzieman]

Is that a reference to the previous shape and the current shape Toyota Hilux failing the moose test.

No, 'twas a reference to the myth of ''legendary Toyota reliability"

 

[Tazzieman]

I haven't noticed anything yet with the OEM Bridgestones but they're rock hard. The dealership set them at 42psi front and 45pai rear twice now - way too much for an unloaded vehicle imo.

Í set mine at 45 (cold) rear with a 2.5T trailer attached. 50psi when tyres are hot. Perfect!
Does your dealer even tow , bro?

 

[255/85]

Í set mine at 45 (cold) rear with a 2.5T trailer attached. 50psi when tyers are hot. Perfect!
Does your dealer even tow , bro?

Not a chance. The dealership focuses on Porsche, Ferrari, and McLaren. Maybe they're trying to improve the handling?

 

[Tazzieman]

Not a chance. The dealership focuses on Porsche, Ferrari, and McLaren. Maybe they're trying to improve the handling?

Let him know if he ever does supply a tow hitch (a la Denis Wilson of the Beach Boys , on his Fezza ), there are some quality accessories from the same mob that provide choice add ons for the Grenadier

 

[CRH]

Let him know if he ever does supply a tow hitch (a la Denis Wilson of the Beach Boys , on his Fezza ), there are some quality accessories from the same mob that provide choice add ons for the Grenadier

Wouldn't you love to see a Ferrari towing, would be like the Lotus used in the Top Gear special in Argentina. Using the wrong vehicle for the job and making it work always makes you smile.

Would be like racing a Grenadier on low profile tyres and dropped suspension, just makes you laugh

 

[Tazzieman]

Wouldn't you love to see a Ferrari towing, would be like the Lotus used in the Top Gear special in Argentina. Using the wrong vehicle for the job and making it work always makes you smile.

Would be like racing a Grenadier on low profile tyres and dropped suspension, just makes you laugh

 

[CRH]

View attachment 7899881

Brilliant, well done that man (or woman)