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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 11-11-2012, 06:35 PM
nfakbc nfakbc is offline
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1997 540i unable to connect to dealer scanner

I have a 1997 540i 6 speed car which has been having some problems (power window, door locks etc, thought it was a bad comfort module but was unable to recode another one to my car). I had the car scanned at both a local dealer and also by a friend with the correct setup to scan my car but the car cannot connect to the machine. I am able to use a generic obd2 scanner to retrieve engine fault codes but cannot retrieve any thing else (abs, airbag, body etc codes).

Any idea what could be going on here or even what to start looking for? Any help would be greatly appreciated!
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  #2  
Old 11-11-2012, 08:20 PM
ninetyseven1 ninetyseven1 is offline
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Quote:
Originally Posted by nfakbc View Post
I have a 1997 540i 6 speed car which has been having some problems (power window, door locks etc, thought it was a bad comfort module but was unable to recode another one to my car). I had the car scanned at both a local dealer and also by a friend with the correct setup to scan my car but the car cannot connect to the machine. I am able to use a generic obd2 scanner to retrieve engine fault codes but cannot retrieve any thing else (abs, airbag, body etc codes).

Any idea what could be going on here or even what to start looking for? Any help would be greatly appreciated!
you are using the 20 pin round connector under the hood right?
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  #3  
Old 11-11-2012, 08:24 PM
nfakbc nfakbc is offline
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Tried going through that connector as well as the standard obd2 port, same result. Any clue what is the first computer/ module in line which these ports try to connect to? From research online it seems to be the gauge cluster but that doesn't seem right.
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  #4  
Old 11-11-2012, 08:50 PM
edjack edjack is offline
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The DLC communicates directly with the DME. The DME is the gateway into the CAN Bus, from which all other buses are accessed.

On your MY, the OBD-II connector only carries generic access. The BMW computer uses the 20-pin DLC under the hood, which has all the appropriate signals.

All I can think of is that an earlier owner screwed up when trying to reset the Service Interval Indicator, and may have somehow damaged an input signal to the DME.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #5  
Old 11-11-2012, 09:48 PM
vavet5308 vavet5308 is offline
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I'd start by looking to see if you have power at certain pins of the 20-pin connector. If you do, the next step would be to check continuity between the connector and the various modules on the bus.

Pins 4, 16, and 14 should all have power from fuses 38, 15, and 114, respectively. If one of those pins doesn't have power, check the appropriate fuse.

http://www.bmw-planet.com/diagrams/r...9old/index.htm

The diagnostic connector is under:
Drive -> Engine (other than M51) -> Engine electrical -> Digital motor electronics -> interfaces, signals -> diagnostic connector -> (then pick the model appropriate for your car)
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  #6  
Old 11-11-2012, 09:58 PM
edjack edjack is offline
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What's the secret to using this site? I get no connector pinout graphic, just a blank screen.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #7  
Old 11-11-2012, 10:05 PM
vavet5308 vavet5308 is offline
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no secret, no login, maybe you're missing a plugin or something. I've found there are fewer bugs with explorer than with firefox.
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  #8  
Old 11-12-2012, 09:10 AM
rdl rdl is offline
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Quote:
Originally Posted by edjack View Post
What's the secret to using this site? I get no connector pinout graphic, just a blank screen.
Edjack
You are probably missing the SVG viewer; some systems come with it installed, others not.
You can find the viewer on Adobe's website. Adobe will warn you that the viewer is no longer supported & that there may be security concerns. I've used it for ~3 years without problems. Norton Internet Security has never squawked that anything bad is going on, nor did NIS object about security when I installed the viewer.
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  #9  
Old 11-12-2012, 09:36 AM
edjack edjack is offline
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rdl, thanks, but it appears that they've removed the reader from the donwload area.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #10  
Old 11-12-2012, 10:42 AM
nfakbc nfakbc is offline
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Where are these fuses fuses 38, 15, and 114 located (these cars seem to have a ton of fuse boxes!).
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  #11  
Old 11-12-2012, 08:56 PM
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QSilver7 QSilver7 is offline
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Quote:
Originally Posted by nfakbc View Post
Where are these fuses fuses 38, 15, and 114 located (these cars seem to have a ton of fuse boxes!).
Fuse 15 & 38 are in the glovebox fuse location:


Fuse 114 is located under the carpet in the fuse box under the right seat:

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Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg
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  #12  
Old 11-13-2012, 08:37 PM
nfakbc nfakbc is offline
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Thank you sir, will check those fuses tomorrow.
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