Notices
LS - 4th Gen (2007-2017) Discussion topics related to the current flagship models LS460, LS460L and LS600H

Brake Actuator / Accumulator - Is Frequent Priming Normal?

Thread Tools
 
Search this Thread
 
Old May 21, 2023 | 12:25 PM
  #16  
JasonARGY's Avatar
JasonARGY
Thread Starter
Rookie
 
Joined: Dec 2014
Posts: 43
Likes: 21
From: Arizona
Default

Originally Posted by Sherl
Good to hear that. How was the brake hold before? Was constantly working the pump?
I honestly barely used Hold feature. Only used it a few times just to test it out as I've never had it before. I could never hear the pump working once the engine was on though so I cant really tell what it was doing. It probably was really putting in overtime but because I couldn't hear, I assumed everything was fine.

Originally Posted by Boykie
You MUST do 'actuator removed' procedure. Just do it by the book and it will go thru. Don't forget to zero down and disconnect stuff as indicated and wait indicated time between steps and it will go thru.
I did do the "actuator removed" procedure all the way through, exactly as it told me to. I just wanted to run through it a second time as I felt like it wasn't fully bled but the procedure kept failing at the step where you bleed front 2 brakes, then turn off ignition and wait 2+ minutes, then plug in actuator plugs, turn on ignition, and move to rear brakes, but once I go to start the rear brake bleed, the procedure failed and wanted to start from the beginning. We tried it 3 times but same failure at same spot. So we just decided to just do the "air bleed" for the rear as the front had been bled sufficiently by this point and there was definitely a lot of air still in there. I mostly wanted to do the part where the accumulator releases pressure 5 times to bleed itself but could never get that far after the first time. Not sure if that's the "zero down" part of the procedure. Either way, while I wish I could have done one more full bleed of the system, it has been stopping fine and the pedal feels good so I think I can call it a success unless something pops up in the next few days.
Reply
Old May 21, 2023 | 01:08 PM
  #17  
Gerf's Avatar
Gerf
Pole Position
Shutterbug
Community Builder
Loved
Community Favorite
 
Joined: Jan 2022
Posts: 3,034
Likes: 1,129
Default

Originally Posted by JasonARGY
We did the "Actuator has been removed" procedure once but wanted to do it again as it looked like there was still air in the system. We tried 2 more times but Techstream kept failing a couple steps in at the same step. So we went with regular air bleed, did all 4 corners and there definitely were a few air bubbles left in there.
I tried an internet techstream once and that's what it would do, it was good for clearing codes and some settings but for most things it would time out or tell you to start over, lose communication etc etc.

I'm sure yours is legit but that's what happened to me.




Reply
Old May 21, 2023 | 03:07 PM
  #18  
Boykie's Avatar
Boykie
Instructor
Photogenic
Liked
Loved
Community Favorite
 
Joined: Sep 2021
Posts: 1,145
Likes: 602
From: VA
Default

Jason, PM me - I'll help you thru. That's why you kinda need FSM for stuff like that.
Without finishing the sequence there's still leftover air in the dreaded 'red suction line'. And rears are fully electronically operated, so finishing F-F-R-R-R (yes, three rear bleeds total - sequence will bleed red line first via one of rears then bleed both rears) sequence is essential.
Waiting for PM, friend.
Reply
Old May 22, 2023 | 06:44 AM
  #19  
JasonARGY's Avatar
JasonARGY
Thread Starter
Rookie
 
Joined: Dec 2014
Posts: 43
Likes: 21
From: Arizona
Default

Originally Posted by Gerf
I tried an internet techstream once and that's what it would do, it was good for clearing codes and some settings but for most things it would time out or tell you to start over, lose communication etc etc.

I'm sure yours is legit but that's what happened to me.
I definitely put my eye patch on and had a parrot on my shoulder to get the Techstream that I have. I guess I’m pretty lucky to have been able to get one good bleed out of it before having the communication issues.



Originally Posted by Boykie
Jason, PM me - I'll help you thru. That's why you kinda need FSM for stuff like that.
Without finishing the sequence there's still leftover air in the dreaded 'red suction line'. And rears are fully electronically operated, so finishing F-F-R-R-R (yes, three rear bleeds total - sequence will bleed red line first via one of rears then bleed both rears) sequence is essential.
Waiting for PM, friend.
Yes, I remember the 3 rear bleeds and a lot of air violently coming out. Would I have any noticeable symptoms of air in that red line? And is it common to need to run through the whole “actuator removed” process more than once? Sending PM now.
Reply
Old May 22, 2023 | 06:59 AM
  #20  
Boykie's Avatar
Boykie
Instructor
Photogenic
Liked
Loved
Community Favorite
 
Joined: Sep 2021
Posts: 1,145
Likes: 602
From: VA
Default

Replied.
Yes, I do actuator removed 2+ times usually when I replace the unit.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
LexusK
ES - 1st to 6th Gen (1990-2018)
4
Jan 18, 2023 05:31 AM
SW17LS
LS - 4th Gen (2007-2017)
63
Feb 11, 2022 08:18 PM
Nodo1999
RX - 2nd Gen (2004-2009)
3
Nov 23, 2019 08:47 PM
UZ214
LS - 4th Gen (2007-2017)
4
Nov 12, 2017 09:49 AM
Strizel
GS - 2nd Gen (1998-2005)
13
Jul 9, 2013 10:11 PM




All times are GMT -7. The time now is 09:50 AM.