BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


Reply
 
Thread Tools Display Modes
Old Wed, Oct-01-2008, 05:10:03 PM   #1
m3 hal
Registered User
 
Join Date: Jan 2006
Posts: 21,633
Reputation: 0 m3 hal will become famous soon enough

United States




Default SMG troubleshooting FAQ



General SMG system information: http://jasoncampagna.com/SMG.pdf

SMG Serviceable Parts

hydraulic unit (aka the pump)
PN: 21532229715
DIY replacement thread:http://www.m3forum.net/m3forum/showthread.php?t=227209
DIY guide by Mr. Andersen: http://www.nugadgets.com/customcontent/SmgDiyMain.html


accumulator (included with the hydraulic unit but also available seperately)
PN: 21532229716


relay (salmon colored, located in the relay box on top of the drivers side shock tower)
PN: 12631742690


Source: http://www.m3forum.net/m3forum/showp...7&postcount=36


gear position sensor (located near the back of the transmission)
PN: 23412229792


actuators (mechanical arms used to physically change the gears)
PN: 23412229789


hood sensors (two switches located under the hood to detect when open/shut)
PN: 61319119052


SMG hydraulic fluid (Pentosine CHF11s)
PN: 81229407758
My current thinking is that a full hydraulic fluid change would be a tad bit on the expensive size and probably unnecessary. However if you've got a lot of miles you may want to consider using a device to syphon fluid out of the reservoir for a partial fluid change. This way you don't have to worry about properly resealing the system or getting air in the lines.

Troubleshooting

The Autoenginuity tool is an excellent tool for troubleshooting the SMG system and can take a lot of guess work out of the equation in some cases. Generic code readers are mostly useless since the trouble codes it returns are usually non-specific and the descriptions are typically not accurate. The Autoenginuity also allows for DIY work such as clutch changes and pump changes to be done at home in the proper way.

Specific Issues

--Car won't engage 1st gear or reverse after cranking, drops out of 1st, won't start, weak remote key, or other minor nuissance.

Before getting too worried, open and shut the hood once or twice, and make sure all doors/trunk are shut. If still no luck, replace the relay. In general, whenever there is any type of problem with the SMG that seems electrical related, go ahead and replace the relay first. It seems to be a pretty common problem and can cause a wide range of issues. The part is ~$15-$20, takes 5 minutes to replace, and it's a cheap solution that should be ruled out early when trying to diagnose an issue.

Also check the hydraulic fluid level on top of the intake manifold. I have had the car not want to hold a gear and the transmission light came on simply because it was low on fluid. (note: the SMG system "shouldn't" be consuming/leaking fluid, mine was low from a Delage install were I swapped fluid reservoirs and forgot to refill the new one).



-- 2->3 shifts became "delayed". *Sometimes* when shifting from 2->3 it would take 4-5 seconds to engage the gear and the gear indicator (3) would flash on the dash during this time. I had zero power during this time, and was basically coasting. Eventually it became so bad it wouldn't even go INTO gear and then start skipping gears (2->5 instead of 2->3). (original post: http://www.m3forum.net/m3forum/showp...5&postcount=25)

Replace the gear position sensor.



--No noise from the pump when unlocking the car. Transmission will not engage any gear.

If you've already replaced the relay and there's still no noise from the pump, the hydraulic unit has likely failed.

If the pump makes noise but will not engage a gear, I'm curious as to whether just the accumulator may be the issue, since the hydraulic unit comes w/ the accumulator from the dealer, and the accumulator is also available separately and costs ~$450, it may be the part that wears out. It's an expensive risk to take though, because if the accumulator is not the problem, then it's the cost of labor x2 and you have to rebuy the accumulator when you get the new pump. If it does fix the problem, it would result in about $1k or so in savings. If somewhat had some input on what the accumulator actually does (stores built up pressure?), that would maybe clear this up.


--Red SMG light on and or flashing gear numbers.

Check/replace the hood sensors.


--3rd to 4th shift delay (broken $2 spring): http://www.m3forum.net/m3forum/showt...44#post3497344


--Transmission light comes on after car heats up. Car violently jerks in and out of gear, and limps forward. Shows fault code - 0028 - faulty clutch position sensor

Replace clutch slave cylinder. http://www.m3forum.net/m3forum/showthread.php?t=366642



SMG paddle and paddle switch replacement DIY:


http://www.m3forum.net/m3forum/showthread.php?t=157684
http://m3forum.net/m3forum/showthrea...ghlight=Paddle

PM me with revisions/input

Last edited by m3 hal; Tue, Jun-07-2011 at 02:27:11 AM.
Jump to top m3 hal is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Thu, Oct-02-2008, 05:38:10 PM   #2
Leo
Registered User
 
Leo's Avatar
 
Join Date: Oct 2001
Posts: 892
Reputation: 0 Leo is on a distinguished road
Location: Germany

Germany




Default

Maybe this can answer some of the questions you have?

If something is missing or incorrect just send the maintainer an email. I'm sure will be happy to for the information.

Jump to top Leo is offline   Reply With Quote
Old Thu, Oct-02-2008, 09:17:08 PM   #3
m3 hal
Registered User
 
Join Date: Jan 2006
Posts: 21,633
Reputation: 0 m3 hal will become famous soon enough

United States




Default

Quote:
Originally Posted by M3FORM33 View Post
Great write up Hal, its gonna be a very usefull piece as people start getting more mileage and start having probs with the SMG. I went through hell and back with mine!
Thanks. If you experienced some problems and got them worked out, and I don't have them in the thread already (or if my descriptions are incorrect or incomplete), send me a pm or post them.
Jump to top m3 hal is offline   Reply With Quote
Old Sat, Oct-18-2008, 12:39:09 AM   #4
Pantera
Registered User
 
Pantera's Avatar
 
Join Date: Aug 2003
Age: 53
Posts: 364
In the garage:
Reputation: 0 Pantera is on a distinguished road
Location: Alexandria, VA

United States




Default Intriguing symptom

The timing of this couldn't have been better, although I wish I wouldv'e found it prior to being charged about $350 in diagonostic fees.

Sadly I found the thread regarding the failed relay the same day that the Service Tech figured it out and thus the education from here was free but the cost of repair was significantly higher than necessary.

My contribution to the thread is that there seemed to have been an increasing weakness in my remote being able to open the doors. I initially equated the weakness to a remote battery problem, but it wasn't until after I had the relay replaced that I noted the significant improvement in the performance of the remote. I should note that the weakness increased for at least a week before the relay starting acting up.

The first time the car failed to start I surmissed the problem was battery failure (who hasn't had their BMW OEM battery fail?). I jump started the battery and everything, aside from the door locks, seemed to function fine. The car continued to start multiple times that day, and even the next. Then on Monday morning, wouldn't you know, the car wouldn't start. I put the battery on a newly purchased Sears diagnostic battery charger. The charger indicated the battery was 100%, but I went ahead and put it on rapid charge, 30A, to kick it in the ass. I put the battery back in and the car started. I drove the car directly to the BMW dealer where they did other standard maintenance while diagnosing the (relay) problem.

I don't believe that it was mere coincidence that the remote performance improve dramatically after the relay replacement.

Edit: I noted in other threads about the door lock problems before the relay failure.

I'm definitely going to have a spare relay in each of my M3s.

BTW, my car had about 46k miles on it at the time of failure.
__________________
Official Dragon Slayer ( 07/04/07 )
http://www.tailofthedragon.com/dragon.html

Last edited by Pantera; Sat, Oct-18-2008 at 01:04:32 AM.
Jump to top Pantera is offline   Reply With Quote
Old Sun, Oct-19-2008, 05:16:36 AM   #5
m3 hal
Registered User
 
Join Date: Jan 2006
Posts: 21,633
Reputation: 0 m3 hal will become famous soon enough

United States




Default

Quote:
Originally Posted by Pantera View Post

My contribution to the thread is that there seemed to have been an increasing weakness in my remote being able to open the doors....
added a mention of this to the relay troubleshooting

Thanks for the comments everyone. Post your issues/resolutions/part number if you don't see it here.
Jump to top m3 hal is offline   Reply With Quote
Old Sun, Oct-19-2008, 05:30:51 AM   #6
yaja23
M Addict
 
yaja23's Avatar
 
Join Date: Jan 2008
Posts: 1,386
In the garage:
Reputation: 0 yaja23 is on a distinguished road
Location: Bay Area

United States




Default

Quote:
Originally Posted by drunk hal View Post
added a mention of this to the relay troubleshooting

Thanks for the comments everyone. Post your issues/resolutions/part number if you don't see it here.
You might want to add information about checking the SMG fluid to make sure its full and checking for leaks etc. I remember someone posting here about a SMG issue and it was caused by a kink in a hose coming from the SMG reservoir.
__________________


Orion V2 Angel Eyes, OEM LED TailLights, Valentine1 Hardwired, OEM ZCP Rims, Turner Subframe Reinforcement Kit, Vorsteiner Double Sided CF Bootlid
Jump to top yaja23 is offline   Reply With Quote
Old Sat, Apr-06-2013, 03:18:04 PM   #7
07'335i
Registered User
 
Join Date: Jan 2011
Posts: 114
Reputation: 0 07'335i is on a distinguished road

United States




Default Re: SMG troubleshooting FAQ

Quote:
Originally Posted by yaja23 View Post
You might want to add information about checking the SMG fluid to make sure its full and checking for leaks etc. I remember someone posting here about a SMG issue and it was caused by a kink in a hose coming from the SMG reservoir.
what this guy said i just found a leak coming from smg somewhere i believe. the fluid is green and saturated so im assuming it is pentosin. just worried as to where this leak is actually coming from as i haven't had the chance to pull anything off just looked at it with a flashlight and its apparent there is a leak somewhere. really worried as to how much this is gonna set me back.

thanks in advance for any help.

Jacob
Jump to top 07'335i is offline   Reply With Quote
Old Sun, Oct-19-2008, 07:17:59 PM   #8
Chris(NJ)
Back home in Jersey
 
Chris(NJ)'s Avatar
 
Join Date: May 2005
Age: 39
Posts: 3,078
Reputation: 0 Chris(NJ) is on a distinguished road
Location: Central Jersey

United States




Default

Quote:
Originally Posted by Pantera View Post
The timing of this couldn't have been better, although I wish I wouldv'e found it prior to being charged about $350 in diagonostic fees...........................
This post is definitely interesting. I too would write those symptoms off as something not related to the smg system. I've noticed my passenger door not always unlocking w/ the key, even after multiple attempts. It will take me to lock the door, then unlock it again. I just figured it was strange and havent though much about it. Now you have me wondering. I ordered 2 new relays last night. I'm going to change it out right away as preventative maintenance, and keep the other in the glove box, just in case.
__________________
2002 Topaz/Black M3-Slicktop-SMG: OEM CSL Bootlid, Mini-CSL Battery, TMS Pulleys, Stoptech SS Lines, Borla muffler & Midpipe, Hotchkis Sways, Eibach Springs, RE RSMs, PowerFlex Rtabs, PowerFlex Subframe Bushings, TMS Subframe Reinforcement, Blk Grills, Blk Side Gills, VCSL Center Console, Euro Front Bumper, Hamann Fog Ducts, ACS Lower Lip Spoiler, FUCY Rear Diffuser, LED Tail upgrade w/ outer ring mod, D/A street software, RPI Scoops, e92 m3 18" rims w/ PS2s
Jump to top Chris(NJ) is offline   Reply With Quote
Old Wed, Aug-15-2012, 02:35:02 AM   #9
DNYCEM3
IMOLA ON IMOLA BEAST!...
 
DNYCEM3's Avatar
 
Join Date: Mar 2011
Posts: 673
Reputation: 0 DNYCEM3 is on a distinguished road
Location: NYC

United States




Default Re: SMG troubleshooting FAQ

I hate myself for buying this smg model I had the clutch changed due to the shop telling me it was the issue and now the car no longer has 2nd 4th or 6th gear !!!! Wtf I'm going nuts there telling me I need to change out full trans,,
__________________
BLK/BLK 330i 4DOOR M3 SOLD
IR/IR 6SPEED E46 M3 SOLD
AW/CIN E46 M3 SMG SOLD
CB/CIN E46 M3 SMG SOLD
BLK/BLK E46 M3 SMG SOLD
Blue/blk E36 M3 SOLD
Blk/blk E60 M5 SOLD
Silver/blk E36 M3
Red/blk 1990 E30 M3
TIAG/IMOLA RED RHD E46 M3 TWIN TURBO FULLY BUILT 950 WHP
NISSAN R35 GTR 1300 WHP
PORSCHE 911
INSTAGRAM @911GTRM3
Jump to top DNYCEM3 is offline   Reply With Quote
Old Wed, Aug-15-2012, 07:21:57 AM   #10
SteveEvans
Registered User
 
Join Date: Apr 2011
Posts: 263
Reputation: 0 SteveEvans is on a distinguished road

United Kingdom




Default Re: SMG troubleshooting FAQ

The selection of these gears has in common the movement of the hydraulic actuator in the same direction. I'd be looking at the actuator or potentiometer measuring its deflection.

Steve
Jump to top SteveEvans is offline   Reply With Quote
Reply

Bookmarks

Tags
faq, smg, troubleshooting

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Troubleshooting Codes AirDoc E36 M3 (1992-1999) 0 Sat, Nov-17-2007 03:49:53 AM
Troubleshooting a problem ----> HELP ! RoadShreader E36 M3 (1992-1999) 43 Sun, Dec-31-2006 07:05:57 PM
Eclipse Troubleshooting crazy32184 E36 M3 (1992-1999) 7 Thu, Jun-09-2005 07:03:15 AM
HELP PLEASE!!! Troubleshooting my ///M! M3nEwBoOtY E36 M3 (1992-1999) 6 Sun, Apr-03-2005 04:37:52 PM



All times are GMT. The time now is 01:55:21 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright ©1999-2017 M3Forum.com
Discussing SMG troubleshooting FAQ in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)