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  #1  
Old 3rd April 2007
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Default Gunson fault code / flash code reader

Anyone got one of these they want to 'rent' out to me for a couple of days? I don't fancy investing £30 in my own and have no idea where to start making up special wires with switches in etc - I'm more a plug and play kinda guy

I assume they will help me reset the ECU - thats what I am aiming to do.
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  #2  
Old 3rd April 2007
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if you want to reset the ecu, just dissconect the battery for 30 minutes....

as for making a special tool.... its so ludicrusly easy
i will try and take a picture of mine when i get home - it took a matter of seconds to put it together and required no soldering at all

G
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  #3  
Old 3rd April 2007
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Thanks G, I would appreciate seeing a picture.

As for just disconnecting the battery, according to various posts that does not work on the later c900s? Happy to be proved wrong though. Nick
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  #4  
Old 3rd April 2007
THE ANORAK THE ANORAK is offline
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Think my son has one in MY garage! Let me know and I,ll dig it out.
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  #5  
Old 4th April 2007
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Hey Anorak, would be greatful for a lend, thanks. Send me a PM and we can sort out me paying for the postage, 'rent' etc. Or if he does not want it anymore happy to buy it. Cheers Nick
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Old 4th April 2007
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Making a test lead for that is about as easy as it gets, it would probably take about one minute to twist the wires onto the clips/switches/etc
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  #7  
Old 4th April 2007
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Fair enough, but then if you factor in that I don't have any of those things so would have to go and buy them...

...and then reading the instructions I was concerned how easy it might be to miscount the flashes, so thought that if someone has developed the correct tool already (and I can lay my hands on it cheaply) then why not use it

Gunson tell me that "We did make a G4159 that would fit a Saab 900 with a B202 engine 1988 to 1993 with Bosch LH 2.4 ECU system (Bosch ECU not injection). 10 pin DLS. These are very specific and won’t deviate."

So I am going to check mine out for that if ANORAK finds his Gunson
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  #8  
Old 4th April 2007
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Does the thing tell you what the codes are?
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  #9  
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I guess it will tell you what the codes are, but not what they MEAN. The sales blurb say that there is a lookup table in the box to do this.

To be honest I was just interested in resetting the ECU and see if it made any difference to the car. Andy at the SaabScene RR day did same on his 9000 and said it was like driving a different car.
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  #10  
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It would be very convenient, but you could try what G said, with the battery disconnect...

What's the rationale for resetting the ECU - does it make it resample the fuel system or something?
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  #11  
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Even if I disconnect the battery, which some posts say don't affect later cars, I have no way of knowing if it reset the ecu without getting the tool or making up the wire anyway.

>>rationale

Just like I say, a 9000 owner I met recently recommended it. Looking through the tech stuff and posts about ECUs does not seem like it does it any harm (famous last words )
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  #12  
Old 4th April 2007
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nick... send me your address in a PM and I will post you down mine that i made, along with some seriously easy "how to's" that i have taken from the Lucas Manual... (that Gunson tool you mentioned, only seemed to quote refence to the Bosch ECU's, despite also saying it went up to 1993 )

It really is just a case of clipping one end of the switch to a ground, the other to the ECU test spade (usually lost somewhere bewteen the power steering resovoir, extra relay pod in by the O/S wheel (have a look in my Fotolog or SaabPics.. theres a pic in there somewhere)....

when you have connected it up, follow the instructions. You get a series of flashes that i think tell you the thing is connected, then a series of flashes that are the fault code.... the instructions have a table of references for deciphering them, and a diagnostic section for common faults.....


in fact, i think the Lucas Manual is electronically available on this site somewhere.. if not, Matthew has it on his domain

ok... PM me your address, and i will post it off tonite - just post back when you are finished

G
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  #13  
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Cheers G You have PM.
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  #14  
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pics of wher the ECU socket is (i say socket.... its just a female spade connector )
also, PM me your email, and i will send you the Lucas Manual in PDF... just found it!


G
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  #15  
Old 4th April 2007
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Quote:
Originally Posted by drg23
pics of wher the ECU socket is (i say socket.... its just a female spade connector )
G
G thats a male spade

I never even knew that was the code pulling wire, I have never needed to pull codes for anything, the Lucas has been rock solid.
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  #16  
Old 4th April 2007
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no it aint - unless i got my biology wrong and im actually a lady



male spade ....................................goes inside female?


G
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  #17  
Old 4th April 2007
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Quote:
Originally Posted by drg23
male spade ....................................goes inside female?
G
I guess it depends on what kind of movies you watch

Holy cricket sheit your right

From the first attachment it looked flat, I need new specs
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  #18  
Old 4th April 2007
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Quote:
Originally Posted by drg23
the ECU test spade (usually lost somewhere bewteen the power steering resovoir,
And he is not wrong on location either - looked on mine tonight and it was right where he said it would be

Last edited by nbell; 5th April 2007 at 05:43 AM.
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  #19  
Old 4th April 2007
THE ANORAK THE ANORAK is offline
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[QUOTE=drg23]no it aint - unless i got my biology wrong and im actually a lady



male spade ....................................goes inside female?


G, in this big wide world .................. not always so !!!!!!!
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  #20  
Old 5th April 2007
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steve... you just made my morning... cheers mate

G
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