Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
Dsc and brake pedal, odd question
-
- Member
- Posts: 110
- Joined: Wed Jun 09, 2021 5:10 pm
- Location: Oldbury, West Midlands
Dsc and brake pedal, odd question
Guys, a bit of a story. Back in June time I was getting the dsc light coming on intermittently, so got two new dsc sensors off eBay. They were very cheap, but seemed to do the trick with no more warning lights coming on. Fast forward to a couple of weeks back and I get the dsc light on again, this time all the while. But I hadn’t thrown away the original sensors, so refitted those and dsc light is off, but occasionally comes on. I order two (hopefully) better quality sensors and fit them yesterday. No warning lights now on, but the strange thing is that the brake pedal now seems to “bight” about an inch lower in the travel than it did before. I sealed the master cylinder before swapping the sensors, and lost very little brake fluid when changing the sensors. There are no leaks anywhere and the brakes work fine, no sponginess, so can’t understand why the pedal is now different.
Ideas ????
Al
Ideas ????
Al
BMW newbie, 2003 E85 2.5 SE - but after 10 Discoveries this ought to be a walk in the park
- Ewazix
- Lifer
- Posts: 4721
- Joined: Sun May 02, 2010 5:30 pm
- Location: Somerset
Dsc and brake pedal, odd question
I think you need to eliminate the possibility of air in the lines, I'd replace and bleed fluid including activating the ABS unit if you can.
Once that's done start checking booster vacuum pipes and hoses, maybe something got disturbed?
Once that's done start checking booster vacuum pipes and hoses, maybe something got disturbed?
2003 2.5 SE, low miles, Sterling Grey, 108's & Eagles, no stubby here! Unmolested.
2018 Cooper S Countryman
Fiesta Ecoboost
2018 Cooper S Countryman
Fiesta Ecoboost
-
- Member
- Posts: 110
- Joined: Wed Jun 09, 2021 5:10 pm
- Location: Oldbury, West Midlands
Dsc and brake pedal, odd question
It’s there a sequence to bleeding the brakes, do you start with the wheel furthest away from the master cylinder.
Al
Al
BMW newbie, 2003 E85 2.5 SE - but after 10 Discoveries this ought to be a walk in the park
- colb
- Senior Member
- Posts: 1643
- Joined: Wed Nov 13, 2019 9:45 pm
- Location: Newport, South Wales UK
Dsc and brake pedal, odd question
Yes so thats going to be the rear with the longest run from the master cylinder followed by the other rear then onto the front with the longest run from the master cylinder and end with the remaining front thats got the shortest run from the master cylinder. Keep the master cylinder topped up when bleeding do not let it fall too low so air gets into the system. If you do then it will require the ABS being activated to clear any air that has got into it. You would have to go around and rebleed all four again.
Z Shed Cymru member
1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
If the forum helped you, why not help the forum back. Thats the Z4 way!
https://www.paypal.com/cgi-bin/webscr?c ... source=url
1999 1.8 Z3
2003 2.5 Z4
1998 Honda Deauville 650
If the forum helped you, why not help the forum back. Thats the Z4 way!
https://www.paypal.com/cgi-bin/webscr?c ... source=url
-
- Member
- Posts: 110
- Joined: Wed Jun 09, 2021 5:10 pm
- Location: Oldbury, West Midlands
Dsc and brake pedal, odd question
Ok cheers. On a uk car I guess the longest run would be the passenger side rear first, then driver’s side rear, followed by passenger side front then drivers side front.
Al
Al
BMW newbie, 2003 E85 2.5 SE - but after 10 Discoveries this ought to be a walk in the park
- patriot66
- Lifer
- Posts: 3480
- Joined: Sun Jan 11, 2015 2:59 am
- Location: Mawdesley, Lancashire
Dsc and brake pedal, odd question
Actually, the longest brake line run on a UK E85 is to the drivers side rear brake as it runs alongside the nearside brake line (underneath the plastic underfloor weather panel)to the rear and then up and across under the boot floor to the drivers side rear arch, so I always start with that caliper when bleedingthespannerman wrote: ↑Fri Nov 12, 2021 12:09 pm Ok cheers. On a uk car I guess the longest run would be the passenger side rear first, then driver’s side rear, followed by passenger side front then drivers side front.
Al
Sterling Grey '03 2.5i SE / Infinitas Supercharger / S.M.G / Hardtop / Gloss Black 162s / Bilstein B4s / 3.0i Brakes / DLV De-Cat & Silencer / Rebuilt VANOS / Sonar 2Xcite Lights / Carbon & Alcantara Trim / M-Sport Seats / ...& Side Covers !
-
- Member
- Posts: 110
- Joined: Wed Jun 09, 2021 5:10 pm
- Location: Oldbury, West Midlands
Dsc and brake pedal, odd question
Ok thanks for that, cheers
Al
Al
BMW newbie, 2003 E85 2.5 SE - but after 10 Discoveries this ought to be a walk in the park
- DMike
- Senior Member
- Posts: 2440
- Joined: Tue Sep 11, 2007 7:15 pm
Dsc and brake pedal, odd question
I’ve also been bleeding my brakes as described above. Last time when clearing the service interval I noticed there’s a specific ISTA routine for brake bleeding. Youtube videos show how to use ISTA for this and that included activating DSC/ABS. I’ve also had intermittent DSC sensor errors for years (just a couple of times and they’ve cleared with cleaning the connectors). Probably wouldn’t hurt to start doing ISTA and DSC bleeding routinely?
2005 Z4 3.0i Sterling grey
-
- Member
- Posts: 110
- Joined: Wed Jun 09, 2021 5:10 pm
- Location: Oldbury, West Midlands
Dsc and brake pedal, odd question
Just got round to doing the brake bleed, and it’s fixed my problem. Looks like it was some air in the front passenger side pipe, all the others were ok.
Happy now
Al
Happy now
Al
BMW newbie, 2003 E85 2.5 SE - but after 10 Discoveries this ought to be a walk in the park