!
More trans issues.
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
More trans issues.
So I have 2002 E55 w210. It's stuck in limp mode. Changed the conductor plate, leaking connector, filter gasket and fluid. Still in limp mode, The gear indicator on the dash is fubared, not displaying correctly. Not sure if it is the display alone since the clock is also a little missed up. I ordered the shifter unit from dealer for $492 at my cost. I'm wondering tho if I only need to tear the shifter apart and replace these two control units and save myself $350 since its $140 to buy them both.
https://www.autohausaz.com/pn/2105451332
https://www.fcpeuro.com/products/mer...mer-2105451332
https://www.autohausaz.com/pn/2105451332
https://www.fcpeuro.com/products/mer...mer-2105451332
MBWorld Fanatic!
Joined: May 2005
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1991 964 Turbo, 2002 Black E55, 2002 Black E55 " The Beast"- 2014 E63s
Why not have it appropriately diagnosed it by a mechanic first rather than throwing parts at it? How many miles? Have you checked the battery to see if it has the enough voltage, a common known problem for limp mode transmissions?
Couple of quick google finds on similar issues
http://www.mercedesmedic.com/mercede...shooting-tips/
https://burdimotors.com/2017/11/30/m...imp-home-mode/
Couple of quick google finds on similar issues
http://www.mercedesmedic.com/mercede...shooting-tips/
https://burdimotors.com/2017/11/30/m...imp-home-mode/
Last edited by C2 Turbo; Aug 2, 2018 at 08:11 AM.
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
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From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Not so sure about that, but it could bad TCU or not accurate oil level..!
or also, the shifter not pointed correctly in the gearbox selector, due to bad shifter
linkage bushing..!?!
-;ZAYED;-
or also, the shifter not pointed correctly in the gearbox selector, due to bad shifter
linkage bushing..!?!
-;ZAYED;-
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Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
Then yes, that is clear as well , The only code that pops into the TCU now is y3/6y1. There was a ton of codes before hand but the conductor plate fixed them. My boss said no to replacing the solenoid since the dealer wants $300 for just the one.
Check the TCM and it is clear of fluid.
Check the TCM and it is clear of fluid.
Junior Member
Joined: Nov 2009
Posts: 71
Likes: 0
My 2000 E55 would go limp at times, especially at Anything over 70 percent throttle. I would shut the car and restart it, it would run fine for a few miles then limp again. It never threw a code or CEL. It turned out to be my crank shaft position sensor was off a few margins and not reading accurately. The dealer readjusted/reset it and it’s worked great ever since. Cheapest service I’ve ever had at MB dealer. $150.
PS- 2 different reputable independent mechanics couldn’t find the fault. You might want to try the dealer. They’ll find it for sure, and then fix it yourself.
PS- 2 different reputable independent mechanics couldn’t find the fault. You might want to try the dealer. They’ll find it for sure, and then fix it yourself.
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
****, found the underlying issue, so the TCM connectors were clear, but after opening up the TCM it was flooded. Gonna spray it down with electrical cleaner, and if that doesn't work I'll reflow the board with flux and report back.
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
Hope clean it up will do the job,
hate when oil goes there, had this once,,
i put sponge at the end of harness to connectors and catch it out, before sneaks into there again..
-;ZAYED;-
hate when oil goes there, had this once,,
i put sponge at the end of harness to connectors and catch it out, before sneaks into there again..
-;ZAYED;-
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
MBWorld Fanatic!
Joined: Nov 2012
Posts: 6,130
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A gaggle of MB's
The "flooded" TCU's I have seen ALL have come back to life with proper cleaning - key is using a ammonia free spray cleaner - cheapest safe/non-ammonia spray is a can of MAF spray - hold board on edge and literally "flood clean" both sides of the board - change the edge you're holding and flood both sides again - be generous so that the cleaner carries away the contamination off the board - clean TCU connector up there as well - air dry board only - no heat.
Good luck with it...
Good luck with it...
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
The "flooded" TCU's I have seen ALL have come back to life with proper cleaning - key is using a ammonia free spray cleaner - cheapest safe/non-ammonia spray is a can of MAF spray - hold board on edge and literally "flood clean" both sides of the board - change the edge you're holding and flood both sides again - be generous so that the cleaner carries away the contamination off the board - clean TCU connector up there as well - air dry board only - no heat.
Good luck with it...
Good luck with it...
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
Update
So update, tcm came back from solder shop and working fine now, super clean. Internal fault code is gone. Took it for a test drive and it is still locked in limp. TCU reported back y3/6y1 modulated pressure solinoid fault. I'm gonna drop the VB tonight. Does anyone have a diagram that shows which solinoid go where and there respective part numbers?
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
Thread Starter
Junior Member
Joined: Jul 2013
Posts: 60
Likes: 1
From: Olympia, WA
2002 E55
Well I'm going back into the transmission. I pulled the solinoid and it tests fine, so I think It was a install error aka my bad. I forget is it 1 gallon of ATF on a valve body drop to fill? Left my tool at work.
