New Discovery V Talk about the new Land Rover Discovery 5
Sponsored by:
Sponsored by:

Brake pedal goes to floor after rear pad change

Thread Tools
 
Search this Thread
 
  #1  
Old 04-01-2021, 09:33 AM
ToiletDuck's Avatar
Rock Crawling
Thread Starter
Join Date: Jul 2007
Location:
Posts: 448
Received 78 Likes on 59 Posts
Default Brake pedal goes to floor after rear pad change

All lines have been bled up at Brake Check. I replaced the pads on the rear and brought it up here to have the lines bled since it’s a two person job. They’ve dumped tons of fluid through it and bled every line. Still squishy pedal with no leaks. No indicators on the dash either. Is there some place that pockets air that needs to be bled? I had a caliper stripped out (not from me) so didn’t drive it for the week. It was real low on fluid at one point. We’re at a loss right now trying to figure it out. He thought maybe a master cylinder but not sure as it’d be a massive coincidence it broke the same time we did a pad change. Does the computer have to recalibrate or be reset? Is the pedal really pushing on something or is it computer controlled with artificial feel?
 
  #2  
Old 04-01-2021, 04:21 PM
LoneStarLR's Avatar
Rock Crawling
Join Date: Aug 2019
Location: Plano, Texas
Posts: 392
Received 90 Likes on 74 Posts
Default

As far as I knew the brake system is brake by wire so just sensor based?
 
  #3  
Old 04-01-2021, 08:24 PM
ponderosajack's Avatar
Recovery Vehicle
Join Date: Oct 2018
Location: Colorado
Posts: 832
Received 237 Likes on 165 Posts
Default

How could it be brake by wire with brake lines from master cylinder to ABS to each wheel caliper?
So you mean that an electrical glitch which is so unlikely in a Landrover renders the brakes inoperable? I think I’ll pass.
 
  #4  
Old 04-01-2021, 08:49 PM
LoneStarLR's Avatar
Rock Crawling
Join Date: Aug 2019
Location: Plano, Texas
Posts: 392
Received 90 Likes on 74 Posts
Default

I was told the brake pedal isn’t connected to the master cylinder. Instead a sensor tells the computer how hard you’ve pressed the pedal and the computer controls the master cylinder instead. A bit like how there is no throttle cable any more between the gas pedal and the throttle body, just a pedal sensor to computer to stepper motor (or whatever).
Apparently that’s how they can do the autonomous braking and stuff without your foot being on the brake, unlike say ABS.
At least that is what I was told when I complained about the pedal feel and grabby (when coming to a stop) brakes. I will admit I haven’t actually looked though.
 
  #5  
Old 04-01-2021, 09:19 PM
ponderosajack's Avatar
Recovery Vehicle
Join Date: Oct 2018
Location: Colorado
Posts: 832
Received 237 Likes on 165 Posts
Default

Could be. I’ll try to look it up. But that’s scary to have my brakes depending upon electronics which don’t always work.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gebo
Discovery I
10
07-19-2019 10:14 AM
bradleyd
Discovery II
8
01-03-2018 08:24 AM
Echoman
Discovery II
10
12-17-2014 01:38 PM
dlov011
Discovery II
4
01-16-2013 01:40 PM
binvanna
General Tech Help
3
10-30-2012 12:07 PM



Quick Reply: Brake pedal goes to floor after rear pad change



All times are GMT -5. The time now is 07:18 PM.