C2514 brake separator valve e55
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From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
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2001 S430 AMG Package
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Joined: Feb 2017
Posts: 248
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From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
Last edited by Overheated; Nov 23, 2021 at 10:38 PM.
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From: Republic of Texas
'99 and '05 E55 AMG
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Joined: Feb 2017
Posts: 248
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From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
MBWorld Fanatic!
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From: Republic of Texas
'99 and '05 E55 AMG
Valves y1 and y2 are normally closed so long as the SBC system is working normally. In the event of the loss of electrical power which would cause the hydraulic pump inside the SBC to quit or if the pump inside the SBC unit fails the SBC unit will then go to a fail safe mode where valves y1 and y2 open. When those two valves are open if you literally stand on the brake pedal it will apply some manual operated hydraulic pressure to the front brake calipers only. Valves y1 and y2 are there as a failsafe so that you can attempt to get the car stopped and on the side of the road safely. I cannot say whether or not changing the brake pads would cause one of those valves to fail. I have not heard of it happening which is not the same as saying it never happens. Assuming you used a star diagnostic system when you changed out the brake pads everything should be fine. It is always possible that it just happened to pick this particular time to fail. If it is failed, the SBC unit is covered under a 25-year unlimited miles warranty at the dealership.
Somewhere in this subform is a 68 page technical document describing the operation of the SBC system. It is an attachment to at least one post on this subforum. PM me your email address and I will email you a copy.
Somewhere in this subform is a 68 page technical document describing the operation of the SBC system. It is an attachment to at least one post on this subforum. PM me your email address and I will email you a copy.
Last edited by bbirdwell; Nov 25, 2021 at 08:53 PM.
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Member
Joined: Feb 2017
Posts: 248
Likes: 36
From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
Valves y1 and y2 are normally closed so long as the SBC system is working normally. In the event of the loss of electrical power which would cause the hydraulic pump inside the SBC to quit or if the pump inside the SBC unit fails the SBC unit will then go to a fail safe mode where valves y1 and y2 open. When those two valves are open if you literally stand on the brake pedal it will apply some manual operated hydraulic pressure to the front brake calipers only. Valves y1 and y2 are there as a failsafe so that you can attempt to get the car stopped and on the side of the road safely. I cannot say whether or not changing the brake pads would cause one of those valves to fail. I have not heard of it happening which is not the same as saying it never happens. Assuming you used a star diagnostic system when you changed out the brake pads everything should be fine. It is always possible that it just happened to pick this particular time to fail. If it is failed, the SBC unit is covered under a 25-year unlimited miles warranty at the dealership.
Somewhere in this subform is a 68 page technical document describing the operation of the SBC system. It is an attachment to at least one post on this subforum. PM me your email address and I will email you a copy.
Somewhere in this subform is a 68 page technical document describing the operation of the SBC system. It is an attachment to at least one post on this subforum. PM me your email address and I will email you a copy.
And found the SBC doc you referenced, thanks.
Last edited by Overheated; Nov 30, 2021 at 03:15 PM.
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2006 Mercedes E500
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From: L.A., Moscow, NYC, San Diego, Baja
1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
From what I recall the boot on a piston was torn. Rebuilt it which was quite simple. The SBC was disconnected and there was no issue with the expansion chamber. Once everything was reassembled, bled the system and cleared the codes which never returned. I think the code popped up result of the compromised pressure (leak).
