General Category > Central Vehicle Electronics/ZFE/GM issues

ESA and ESA Calibration

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ilpo:
I have had issues with my ESA, now that I took a look at first I saw this:


After I applied the ESA adjustment for both rear and back it went into this:



What do these now tell? What was actually wrong with this? Both were taken when bike was on center stand, bike was not moved between these.

I need to go to test drive now...

StephanT:

--- Quote from: ilpo on May 28, 2013, 05:45:55 PM ---I have had issues with my ESA, now that I took a look at first I saw this:


What do these now tell? What was actually wrong with this? Both were taken when bike was on center stand, bike was not moved between these.

--- End quote ---
Quite simple... for front and rear respectively it tells you what the maximum number of pulses is... i.e. from the one end to the other end.. there are 1130 pulses for the rear shock, and it also tells you what the current value is, of where it is right now... i.e.  33 for both your front and rear shock after calibration...

you will see these current settings change for different ESA modes... (obviously as the preload is in a different position)

...now what does this tell you.. well, it tells you that it is at position 33 of 1130 (these are the HALL sensor pulses that are measured... or of you like, at 3% of the travel of the preload...

now looking at our R1200GS Adventure.... after a calibration, I see the following:

Now looking at the rear shock, I can see that I am at position 61 and have a full scale of 2002, or in other words my rear preload is set at 3% of the travel of the preload... and my ESA is set on Comfort for a single rider (one helmet)... The Comfort/Nomal/Sport etc. are irrelevant here, cause they are rebound/damping related... what we are seeing here (the numbers) are for the preload, hence the single rider (1 helmet)...

what else do we learn from this...
that your ESA setting was probably set to single rider as well (hence the same 3 %)
and very importantly, THERE ARE MANY DIFFERENT VARIATIONS OF SUSPENSION used by BMW... see that our one has a max travel of around 2000 pulses, while your one had a max of just over 1100 pulses...

And this is one of the reasons why one needs to calibrate the ESA.. if we would remove the rear shock from OUR bike, and replace it with your shock, then on the singel rider (1 helmet), the ESA would set the suspension to approximately position 61 pulses... (without knowing that the max travel is only 1100 pulses... and effectively the preload would be set far too high... (6% where it should be 3%)

hope this makes some sense...  ;D

StephanT:
Now, for a minute... let's just assume we could set the 1 Helmet, 2 Helmet, and 2 Helmet with Luggage target values...

that means you could set up the bike according to YOUR individual needs... ...i.e. I'm not sure how many of you are 80kg riders, with full Kit... definitely not me.. But (thankfully), I'm not 160kg either... Thus my single rider should be somewhere in between 1 Helmet and 2 Helmet...

...Just saying... would be nice... wouldn't it !

best,
Stephan

ilpo:

--- Quote from: StephanT on May 29, 2013, 12:33:14 PM ---Now, for a minute... let's just assume we could set the 1 Helmet, 2 Helmet, and 2 Helmet with Luggage target values...

that means you could set up the bike according to YOUR individual needs... ...i.e. I'm not sure how many of you are 80kg riders, with full Kit... definitely not me.. But (thankfully), I'm not 160kg either... Thus my single rider should be somewhere in between 1 Helmet and 2 Helmet...

...Just saying... would be nice... wouldn't it !

best,
Stephan

--- End quote ---

Yes - when can we do that  ;)

But still, I'm thinking about the first measurement on the rear 563/1126, that can't be right? I had 1 helmet selected, front was just fine but rear was way over the setting. But after this calibration is was set correctly and it also felt that something was happening when switching between different settings, bike was moving higher/lower.

StephanT:
well, you said you had an issue with your ESA... tell us a bit more... what were the symptoms etc.. ?

now that GS-911 can show these values, we can see how many other people have this or similar issues...  There are some related ESA Fault codes, that tell you there is an issue with the ESA and that it requires calibration... However, I can't tell you what the test requirements are from the ECU, to make it realize that it has an issue and requires calibration... (that's internal to the ZFE)

best,
Stephan

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