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...does this mean it's an update for the 1400 ?
Hi , for those of us less computer literate , does this mean it's an update for the 1400 ? I have a "beetle" map presently in my 2018 Eldorado . Is there anything in particular this addresses ? Peter
Hi,and here's the Xmas update. It seems that the speedo correction factor (that's the animal adapting the actual roadspeed to the one shown in the instrument cluster) was found.Here's the code where the number of milliseconds /h (3.600.000) is divided by the number of pulses from the speed signal generator at the wheel(s). Slightly different from the 5AM another factor (250) is introduced. Which probably can be understood as impulses per 250m, the adapted term would then be 250x4 (1km) / pulses x 4. Which would be 3.600.000ms / pulses per km.The corresponding address for the V85TT is 92E66h, value (1275dec) being the same as in the Cali BIN.If somebody would change the value at either address, by say +5%, and note the resulting change in roadspeed (if any) in the instrument cluster this would validate the proposal.CheersMeinolf
But am I to understand you can adjust the speedometer to read correctly on the V85 ?
Hi,correct. The procedure is, if we leave aside the actual calculations, quite straightforward. Pulses are generated when the wheel is turning. The pulses are processed and divided by the speedo correction factor. The result is the actual roadspeed, which is used for a multitude of purposes in the code and send via CANBus to the dashboard.Legal requirements dictate that the roadspeed shown is always larger than the actual one, never smaller. This is typically in the range of up to +5%. A small change of the speedo correction factor to observe the effect on the displayed roadspeed can be done safely.I strongly recommend not do larger changes as the roadspeed is used too often as guideline/threshold for other procedures. Some such instances are known, many are not. Better to err on the safe side.CheersMeinolf
Ok Meinolf, that is good news.I will have to wait until someone does it and can give the procedure for those like me with little understanding. I will look forward to seeing the progress.Thank you.Peter.
Huzo. Analogue brain in a digital world Ciao
Ok Meinolf, that is good news.I will have to wait until someone does it and can give the procedure for those like me with little understanding. I will look forward to seeing the progress.
Hi Peter,the process is simple. Load the BIN into Tunerpro, change the value of the correction factor, save it and upload it to the ECU. Check if the actual speed (as measured with GPS for example) gets closer to the dashboard value. If yes, the change is in the right direction. If not, same procedure but in the reverse direction.CheersMeinolf