wms 1 Report post Posted November 2, 2011 (edited) I have a 92 535i Sport and have just installed an instrument cluster from a 93 M5 3.8. Where abouts can I get a coding plug reprogrammed for it (not the stealer!). The speedo is reading about 10k off at 100k. Anybody in auckland can do this for me? I can get a blank plug easily enough. Edited November 2, 2011 by Maccoretti Quote Share this post Link to post Share on other sites
hybrid 1039 Report post Posted November 2, 2011 May be of help ? http://www.bmwe34.net/E34main/Maintenance/.../Capacitors.htm Seems you need to interface with the eprom to rewire the Odometer. The Hex part is easy enough to do, just sorting out an interface to it or burning straight to the eprom. Quote Share this post Link to post Share on other sites
BM WORLD 1258 Report post Posted November 2, 2011 or just swap the M5 dial parts over into your old 535i cluster Quote Share this post Link to post Share on other sites
wms 1 Report post Posted November 3, 2011 or just swap the M5 dial parts over into your old 535i cluster If nobody can help I might try this and see what happens. Im not so confident with the whole solder rewire hex edit thing. Quote Share this post Link to post Share on other sites
wms 1 Report post Posted November 3, 2011 Argh. Here are the parameters: The code plug is essentially an EEPROM (the 93C56 circuit) that contains information such as - scaling factor for the speedometer (including the rear differential ratio) - scaling factor for the tachometer - scaling factor for the fuel gauge - number of engine cylinders (4,6,8,12) - data about fuel consumption - info if econometer or oil temperature gauge - km vs miles - fuel tank size (80,81,90) - data about service interval - odometer - chassis number - code plug number - BMW specific number - software version No dial swapping will fix this - will need a recode unfortunately. Quote Share this post Link to post Share on other sites
hybrid 1039 Report post Posted November 3, 2011 Get two types of plugs and note down the fvalues of each EG odometer, chassie number etc. Find someone with an eprom burner/reader that will take that chip. Read in the binary. Use a hex editor to read the BIN in. Try a straight hex to acsii conversion as they are likely stored in clear text and dont use an offset value. Make your changes to the block addresses and reburn the eprom and re-install. I would help but I really have enough on my plate with other project im working on. Quote Share this post Link to post Share on other sites
wms 1 Report post Posted November 7, 2011 Thanks for the info. Looks like I just bought myself a project. :-/ Quote Share this post Link to post Share on other sites
