ESA calibration

[mathiasslo]

Hi guys,

I ve been bussy the last days with replacing the Rear Strut ESA. So far so good. It is on one RT 1200 (368) 08, so the first generation. There is only the rear ESA. When i want to calibrate the spring adjuster, looks everything OK, the dialog between GS 911 and the controler goes good. Than the motor want to start but in thne next moment it stop and the GS 911 write Calibration error.

I try to move the motor directly to the blue connector with 12 V and it goes in both directions, up and down. Autoscan give me no fault code.

With the ESA switch on the left handle  i can choose only between normal, comfort and sport but other (1 hat, 1hat and luggage, 2 hats) doesnt work. On the bike on the conector for the spring adjuster there are also 3 wires and on the strut also 3 wires. But on the old one only 2 wires.

Thx Matjaz

[botus]

sounds like there was a change....   try and check another bike of the same era to see how many wires they had - or run through wiring diagrams to see what the wires do

I'd suggest the wrong shock or a mod you need to understand

if you study this forum page - you can download old world BMW bike tool that lets you get at wiring diagrams

https://www.k-bikes.com/threads/almost-wiring-diagrams.51814/?post_id=318783#post-318783

[mathiasslo]

Yes there was a change. Old strut 33 53 76 75 105 has 3 lines for the spring adjuster and the new one 33 5377 11 074 has only two wires. I have a book with the wiring diagram and there are also 3 wires. It looks like a resistant an contact number 45, 57, 58 on ZFE. I cheked the conatcts, the resistant of the spring adjuster everything OK. Than i try to calibrate the ESA via GS 911 WIFI, and i get the message Rear ESA sensor problem.

Yes i have now the old one on the bike (33 53 76 75 105). I tryed also on another bike the calibration and it works fine. What is also interesting, that on my bike i dont see the position and max position of ESA. Both values are 0. On the other bike i saw immedeatly the values. Normal postion 30 and max. 975.

I will replace now preload part from the new one to old one, because here (old one) is the rebound motor OK and another try with the calibration.

[botus]

at least you are getting somewhere... and found useful info for others

[mathiasslo]

 I put now the new one 33 53 77 11 074 preload motor on a old one 33 53 76 75 105 strut and it works now good. The first Autoscan gives me also an error on ESA sensor, but after succesful calibration with 911 everything was OK.