Techstream ABS "Air Bleeding Has Failed"

I always failed at stoke simulator process when I performed the air bleeding with accurate or replacement. Before that step, I can finish the four wheels bleeding with TS.
Did anyone face the similar issue and how did you fix it?

 

I am having the same issue. Every time it gets up to stroke simulator bleeding, I hear clicking noise under the dash, and then the error message pops up telling me the bleeding procedure has failed. Did you figure out how to resolve this issue? Does anyone has suggestions?

 

Yes I've never had to bleed the stroke simulator I don't think I don't even select that option when I'm doing the bleed I don't think I do I just have to do the fronts then put the relays back in pump the thing 30 times in 30 seconds and do the backs or something I can't remember the exact order if this is a generation too I would try to bleed everything manually get the front where it's clear of any bubbles at the fittings at the calipers all of that then put the relays in and do the back right first and then the left. Then put the relays in and see if you have a decent pedal just sitting there You should know if it's your car You can put it in reverse and go backwards It's not going to go far you'll have some breaks You won't be going anywhere and not be able to stop If your pedal's going to the floor and all this kind of business you may have just not blocked the lines coming out of the back of the reservoir and you let them run out of fluid usually I don't have to touch the strokes emulator I keep the fluid to that and to wherever else it goes live I don't let it drain out of the reservoir because I block all three hoses of the reservoir off The only feed from the reservoir to anywhere that I'm dealing with is to the actuator accumulator assembly the thing we're changing If you let the lines loose and bleed out that go to the stroke simulator it takes forever to try and bleed that thing It's like bleeding a master cylinder on a regular car If you look in the manual they're taking they're telling you to undo fittings and screw in the little plastic fittings and stick the hose in some sort of reservoir and pump it try doing all that one person. So more than likely I don't know if you replacing the stroke simulator I guess I feel bad for you You could bleed it before you mount it.

 

Pardon my ignorance, but what exactly does the "stroke simulator" do? Presumably somehow it simulates the stroke of the piston in the master cylinder, but perhaps in the opposite sense of what the driver's foot does. That is, my guess is that it reduces brake pressure ("modulates the pedal to prevent the wheels from locking up " as we used to say in driver's ed back in the day). That is just a guess, and looking at the diagram of all the valves in the ABS I have little confidence in my guesses about how it operates.

 

Normally it makes you think the pedal is doing something but it is not. Brake by wire. If the system fails the two isolation valves open giving you partial braking.

 

All you have to do to see what goes on is when you have replace the brake actuator and you've done all your bleeding and you still have a bunch of lights on and all this kind of silliness if you have a street in your neighborhood not out on a black and white highway sign or an interstate just a regular little street or if you have a long driveway you can ride up and down your little street or driveway and you'll notice that the brake travel is a little further than normal or a bit further than normal and it seems like the back brakes are doing most of the work with very little front input and when you let go of the brakes after you stop the car you'll hear the undoing of the front calipers it'll be pretty abrupt and it'll make a noise things like that your car will still stop I've driven a car like this on the road amongst other people for 7 months and unless you are doing a panic stop and I mean a serious panic stop you'll barely notice this problem other than the pedals a tiny bit softer than normal and the brakes grab a little differently once you break once or twice like this you'll you'll adjust for this as you drive the car like I say I've been driving one of these all types of city and some highway driving in this condition for 6 months the car's sitting right out here in the driveway I'm getting ready to go drive it right now. When the rain stops I have another actuator to put in it we'll see how that one does but it doesn't stop me from stopping and the brake lights working and going to work or to the store pretty uneventful nobody really cares I just can't tell somebody getting that car and go to the parts store I can go but I can't send anybody else in the car and I wouldn't.