4doordrift Posted January 21, 2013 Share Posted January 21, 2013 Why did Nissan put this feature in and how can I disengage it? I have a had a few situations going up an incline that's to slippery or steep, and as my 02, r50 starts rolling back down the brake pedal gets overridden and can not be depressed. I have almost hit trees and other vehicles because of this and I did it very unsafe. Has anyone else experienced this? Link to comment Share on other sites More sharing options...
Towncivilian Posted January 21, 2013 Share Posted January 21, 2013 What? I've never heard of this feature. Maybe the brake booster loses vacuum when you start rolling backwards? Link to comment Share on other sites More sharing options...
4doordrift Posted January 21, 2013 Author Share Posted January 21, 2013 I don't think so, because it's not a lose of power brakes. It's like a full on stopper on the pedal, it's fskced up and I don't get it. Link to comment Share on other sites More sharing options...
4doordrift Posted January 21, 2013 Author Share Posted January 21, 2013 *loss Link to comment Share on other sites More sharing options...
XPLORx4 Posted January 21, 2013 Share Posted January 21, 2013 That doesn't sound like a "feature" that's included in the R50. I've never heard of something called "Reverse Descent Brake Override". You driving an automatic or manual? If you've got an auto tranny, and your truck rolls backwards while still in "D", the engine may stall and you will lose power brakes. Don't let the truck roll backwards if your transmission is in any forward gear. Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 I'm Not saying that's what the feature is called. I'm Just trying to describe what happens. I have a manual, like I said its not a loss of power brakes, the brake pedal literally cannot be depressed at all when this happens, no matter how much force. If it was a loss of power brakes the pedal could still be depressed and the brakes could still be engaged. Link to comment Share on other sites More sharing options...
keelhaul Posted January 22, 2013 Share Posted January 22, 2013 x2 happens to me as well. 1 Link to comment Share on other sites More sharing options...
Leo94 Posted January 22, 2013 Share Posted January 22, 2013 Do you leave it in a foreword gear when you are rolling back and just push the clutch in? Or do you put it in neutral? Link to comment Share on other sites More sharing options...
bushnut Posted January 22, 2013 Share Posted January 22, 2013 does the hand brake work? and always shift to reverse while rolling backwards,this lets you use the engines compression to slow you down. Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 It's so weird and really unsafe.. I can't really put it into reverse because I'm already rolling back and It difficult to shift it into R while rolling already. Normally it's in gear and I depress the clutch when it happens, sometime I'll be in N. my hand brake is @!*% I've been meaning to adjust it for a mo th or two. It's first on the list when I get back from Nicaragua in a week. Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 @keelhaul - how did you overcome this?? Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 I'm wondering if "Nissan brake override technology" might be the issue. Nissan BOT. Not sure if our whiles come equipped with it or not.... Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 *vehicles Link to comment Share on other sites More sharing options...
Leo94 Posted January 22, 2013 Share Posted January 22, 2013 It is meant to cut engine power not braking power. Link to comment Share on other sites More sharing options...
Towncivilian Posted January 22, 2013 Share Posted January 22, 2013 (edited) Test your brake booster check valve, make sure it is sealing properly. Edited January 22, 2013 by Towncivilian Link to comment Share on other sites More sharing options...
4doordrift Posted January 22, 2013 Author Share Posted January 22, 2013 @towncivilian. Will do, but again it feels like a mechanical pedal stop. Very different than not having power brakes. Link to comment Share on other sites More sharing options...
theexbrit Posted January 22, 2013 Share Posted January 22, 2013 Sounds like it may be a problem with the anti lock brakes. If it believe the car is sliding in reverse it must confuse the ABS or something. Link to comment Share on other sites More sharing options...
Slartibartfast Posted January 22, 2013 Share Posted January 22, 2013 Does it feel like pressing the brake with the engine off, or is it just legit jammed up? I don't see anything about a mechanical pedal stopper in the FSM, and IMO Nissan would've been on drugs to install something like that. You might be able to rule ABS in or out by pulling its fuse and then testing it. If a valve or something is jamming closed, that could be what's locking up the pedal. Link to comment Share on other sites More sharing options...
4doordrift Posted January 24, 2013 Author Share Posted January 24, 2013 It does not feel like using the brakes when the engine is off(ie: no power brakes) I'm familiar with what that feels like. This is like a jam. Link to comment Share on other sites More sharing options...
Slartibartfast Posted January 24, 2013 Share Posted January 24, 2013 Might be something to have a mechanic check out. I'm all for fixing stuff yourself but inoperable brakes seems like something worth calling in an expert for. Link to comment Share on other sites More sharing options...
XPLORx4 Posted January 24, 2013 Share Posted January 24, 2013 Weird. Do some experiments: Go get a buddy, drive to an empty parking lot with no obstacles, or a place with lots of space on level ground where you'll have minimal chance of losing control of the truck or crashing into something and report the results of each test with regard to how the brake responds. (All tests require engine to be running before test begins.) Test 1: From a dead stop, depress clutch, engage reverse gear, release clutch and brake and accelerate to a walking pace in reverse. Do not depress clutch (i.e go ahead and let the engine start to stall) as you depress the brake. What happens? Test 2: Same as test1, except this time depress clutch while you brake. What happens? Test 3: Ask your buddy to prepare to push the car backward. From a dead stop, depress clutch, engage 1st gear and release brake. Keep clutch depressed. Ask your buddy to start pushing. Get up to a walking pace if possible. Depress brake. What happens? Test 4:Ask your buddy to prepare to push the car backward. From a dead stop, depress clutch, engage Neutral and release brake. Keep clutch depressed. Ask your buddy to start pushing. Get up to a walking pace if possible. Depress brake. What happens? Test 5:Ask your buddy to prepare to push the car backward. From a dead stop, depress clutch, shift to Neutral and release brake and clutch. Ask your buddy to start pushing. Get up to a walking pace if possible. Depress brake. What happens? In any test, if brake fails to stop the vehicle, engage parking brake. If that fails, maintain control of the vehicle and allow vehicle to coast to a stop. For safety, do not exceed 5mph in either direction during any of the tests. Link to comment Share on other sites More sharing options...
XPLORx4 Posted January 24, 2013 Share Posted January 24, 2013 Two more for ya: Repeat tests 1 and 5 while revving the engine to 2000-3000rpm. What happens? BTW, this sounds like it could be your problem: http://forums.tdiclub.com/showthread.php?t=327759 Link to comment Share on other sites More sharing options...
4doordrift Posted January 24, 2013 Author Share Posted January 24, 2013 It does not feel like using the brakes when the engine is off(ie: no power brakes) I'm familiar with what that feels like. This is like a jam. Link to comment Share on other sites More sharing options...
4doordrift Posted January 24, 2013 Author Share Posted January 24, 2013 It does not feel like using the brakes when the engine is off(ie: no power brakes) I'm familiar with what that feels like. This is like a jam. Link to comment Share on other sites More sharing options...
4doordrift Posted January 24, 2013 Author Share Posted January 24, 2013 I'll run through the tests when I'm Back in Canadia eh Link to comment Share on other sites More sharing options...
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