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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-22-2017, 08:37 AM   #681
jetblackcookie
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Join Date: Jun 2016
Posts: 25
I would like you to add something specific to the list. My 2001 E46 Sedan (M54) had a crank/no start for 6 months. I contacted dmax about it a few times. It finally ended up being that one of my O2 sensor WIRES was shorting against my engine. The WIRE had come out of its clips and sat against the engine. The heat melted through the shroud and melted the wires inside together. If anyone has tired themselves looking through threads, and this list without fruition, definitely inspect all the O2 wiring.
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Old 04-23-2017, 06:30 PM   #682
Steve0111
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Join Date: Feb 2017
Location: New Zealand
Posts: 4
My Ride: 325i
Hi all, got a lot of good information here but having trouble with start problem. I have no power on any fuse at the EBox, have power on cranking at fuse 29, all lights, windows work etc, unable to read DME as no power to it,
fuel pump not running, anyone know where power supply to Ebox fuses comes from? Thanks for any help
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Old 04-23-2017, 07:16 PM   #683
tubbs76
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Join Date: Nov 2014
Location: sydney
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My Ride: m3 , 323i
Quote:
Originally Posted by Steve0111 View Post
Hi all, got a lot of good information here but having trouble with start problem. I have no power on any fuse at the EBox, have power on cranking at fuse 29, all lights, windows work etc, unable to read DME as no power to it,
fuel pump not running, anyone know where power supply to Ebox fuses comes from? Thanks for any help
Un plug your oil level sensor plug from the oil level sensor that sits in the sump. swap fuse 30 for a new 7.5 amp fuse in the glove box. Start the car and see if it gets power. A faulty sensor causes these issues and allows power but no start. Will cost you nothing to try this and a very high chance could be your cause of issue as it runs on the same line that the battery, alternator, etc run on. If it is the issue, you can run it unplugged for the time being, order an new sensor, drop the oil and replace.
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Old 04-24-2017, 12:04 AM   #684
Steve0111
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Tried that but no go, Where is power supply for ebox fuses, there is no power on any of the 5 fuses
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Old 04-24-2017, 12:29 AM   #685
tubbs76
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Location: sydney
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My Ride: m3 , 323i
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Originally Posted by Steve0111 View Post
Tried that but no go, Where is power supply for ebox fuses, there is no power on any of the 5 fuses
Could be wrong but my understanding is that the power for the e fuses runs directly off off the red power cable.
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Old 05-04-2017, 01:45 PM   #686
asturias2_
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Join Date: Mar 2015
Location: Los Angeles
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My Ride: 2004 330Ci
thank you for putting This together! Great info! I read through some of the posts and seem to still be a little confused on what my issue might be. My car is a 2002 M3 and I've been having start issues.
It first started when I noticed a couple weeks ago that the car was cranking a little weak at times until last Saturday. I turn the key all the lights on the dash come on as normal I push the clutch in turn the key and no start. Made no sound whatsoever. The next morning it started up which was strange. Now it keeps staring but every time the crank sounds like it's getting weaker and weaker. In the past 6 months I've replaced the fuel pump, fuel filter, fuel relay, alrernator and I have a key thats about a month old. I put the key in and open the drivers door and the car makes the beep sound so it's reading the key. I also go the battery tested at autozone and it was working fine. I have been having limp mode and EML issues prior to this. I removed the intake manifold to see the starter crank and to check my TPS connections and it stared up again with a weak crank. Prior to this I had codes

76 electric throttle signal potentiometer throttle

77 electric throttle signal potentiometer servomotor

After starting it I scanned the car and had codes

3a voltage supple sensor 1
3b voltage supply sensors 2
3c signal pedal position sensor 1
3D signal pedal position sensor 2
51 interface multifunction steering wheel / steering column stock
85 CAN timeout steering angle sensor
86 CAN timeout instrument cluster
2c signal thermal oil level sensor
29 signal mass air flow sensor
36 systems voltage main relay
42 EWS interface no communication

Some are related to the car running without the manifold but the EWS one and voltage ones are what have me concerned and thinking that might be the issue I'm just not too sure where to start. If it was an EWS issue the car shouldn't start right? But it does it just cranks weak. I also notice that a single tick sound comes from the DME fox maybe 20 seconds after I shut the car off Thank you!!

Last edited by asturias2_; 05-04-2017 at 01:47 PM.
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Old 05-14-2017, 12:20 PM   #687
FCBuff
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Join Date: Jun 2010
Location: Fort Collins, CO
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My Ride: 2006 M3 ZCP 6mt
Hello, another no start problem.

My 2006 M3 6mt intermittently starts. When it no starts, I get 1 click, then nothing. Try again later, it works, starts like usual. I have checked the following:
Battery 12.6v
Front jump terminals 12.6v
Alternator 12.8-13.2v (seems weak?) dashboard diagnostic
No visible corrosion

Going to check starter terminals voltage
Under side ground cable connection

How to diagnose clutch switch? If it is intermittent problem?

Weak alternator , is this coincidence. Should be over 14v correct?
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Old 05-21-2017, 01:37 PM   #688
E36 Ron
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Join Date: Mar 2011
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My Ride: E46
I finally got PA Soft 1.4 to work somewhat in my 323i. It cannot communicate with the EWS at all, comes up "EWS not found". I am beginning to believe my EWS is shot. When I went to pull it, it was covered in corrosion at the connector. I think I have the connector cleaned out pretty good now, but it still can't find it. I'm thinking about just getting a modified DME and putting the EWS experience behind me. Or, should I order a new EWS and have it flashed to my car?

Thanks in advance for your thoughts...

Ron
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Old 05-21-2017, 02:39 PM   #689
jmo69
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Join Date: Mar 2013
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Posts: 2,329
My Ride: 03 325xi 98 328is
Quote:
Originally Posted by FCBuff View Post
Hello, another no start problem.

My 2006 M3 6mt intermittently starts. When it no starts, I get 1 click, then nothing. Try again later, it works, starts like usual. I have checked the following:
Battery 12.6v
Front jump terminals 12.6v
Alternator 12.8-13.2v (seems weak?) dashboard diagnostic
No visible corrosion

Going to check starter terminals voltage
Under side ground cable connection

How to diagnose clutch switch? If it is intermittent problem?

Weak alternator , is this coincidence. Should be over 14v correct?
Alternator should be putting out 13-14v. On my e36 I bypassed the clutch switch, jumped brown to purple/brown? Been a while and different chassis. Eventually replaced the starter, but never got just a click until the battery started to die.
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Old 05-21-2017, 02:40 PM   #690
E36 Ron
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Join Date: Mar 2011
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So I pulled my EWS connector apart and it is corroded all the way inside the connector where the pins are. I could possibly be missing 2 pins from the EWS module. Looks like they could have been eaten by the connector. One row of the small pins is missing two pins. If anyone is interested, or feels like they can help, I will try and put some pictures up. It's going to be tough soldering a new connector up inside my dash. That thing is a beast to get to.
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Old 05-21-2017, 04:21 PM   #691
E36 Ron
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Join Date: Mar 2011
Location: Oregon
Posts: 9
My Ride: E46
I just ordered a used DME that bypasses the EWS module, so the smaller pins on the EWS (that corroded away on mine), are no longer needed. The person I purchased mine from called me personally and talked me through how to properly diagnose my EWS, to make sure his part will take care of my situation, (on a Sunday no less). I have tried others and was left out in the cold. Once I fire my little 323i, I will report back and let you all know how it turns out.
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Old 05-24-2017, 09:23 PM   #692
E36 Ron
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Join Date: Mar 2011
Location: Oregon
Posts: 9
My Ride: E46
Runs like a champ! Rebuilt the cooling system and installed new power steering lines and reservoir while I was in there. A little corrosion just about had me ready to sell the old girl. If anyone wants the information on the guy I bought my DME from, just shoot me a pm. He went above and beyond to help me out, great guy!

I hope you all find the solution to your problems...

Ron
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