Author Topic: Servo Motor - Clearing Code Problem  (Read 2888 times)

Twempie

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Servo Motor - Clearing Code Problem
« on: May 09, 2024, 07:28:00 PM »
Hi, I'm new to the forum and this is my first post.

I've searched for an answer to my question but couldn't find an answer. My bike is a 2016 R1200RTW.

I recently purchased a GS-911 Wi-Fi (it was time), hooked it up, and it gave me this error code:
Fault Code Value: 0x21FA21
Fault Code: Exhaust flap servomotor,
Description: adjustment error

So, I pulled the silencer, and found the servo flap in the exhaust to be stiff. I lubed/loosened it with copper no-sieze, tested functionality by starting the engine and blipping the throttle (flap was moving as it should). Reassembled everything, ran the GS-911 again. I was able to clear the error code.

So I did a "rescan" and the error code reappeared.
I successfully cleared the code again
Another "rescan" made the error code reappear.
And so on, and so on...

I can clear the code, but a rescan brings it back, and then I can clear the code again... so what am I missing here, and is this normal?

Thanks in advance







WayneC

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Re: Servo Motor - Clearing Code Problem
« Reply #1 on: May 10, 2024, 02:28:36 AM »
The fault code reappearing indicates the fault is still present, I am not too familiar with your model however I recall there is a calibration capability in service functions so take a look there run the routine & the fault should be resolved

Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #2 on: May 10, 2024, 06:44:28 PM »
Thanks Wayne, I'll take a look at that, and check back in.

Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #3 on: May 13, 2024, 04:09:14 PM »
After riding about a hundred miles, I dug a little deeper into the menus and scanned for errors. Now I can't clear the error code 0x21FA21, and have developed a second error code 0x21FA22.

I'll have to pull the silencer and try to clean/lube the servo again. I'm hoping the servo doesn't need replaced.

----
Fault Codes : 2
 
Fault Code Value : 0x21FA21
Fault Code Description : Exhaust flap servomotor, adjustment error
Currently present : YES
Malfunction Indicator Light (MIL) : NO
Frequency count : 2
Logistic (Healing) count : 40
 Fault Code History :
   Record number : 1
   Odometer : 48420.7 mi
   Absolute Time : 9003964
   Speed : 0.0 mph
   Engine RPM :    0 rpm
   Battery voltage : 12.57 V
   Throttle valve angle relative to throttle valve stop : 15.01 %
   Record number : 2
   Odometer : 48420.7 mi
   Absolute Time : 9004212
   Speed : 0.0 mph
   Engine RPM :    0 rpm
   Battery voltage : 12.73 V
   Throttle valve angle relative to throttle valve stop : 15.01 %
 
Fault Code Value : 0x21FA22
Fault Code Description : Exhaust flap servomotor, mechanical fault or blockage
Currently present : NO
Malfunction Indicator Light (MIL) : NO
Frequency count : 2
Logistic (Healing) count : 40
 Fault Code History :
   Record number : 1
   Odometer : 48420.7 mi
   Absolute Time : 9004169
   Speed : 0.0 mph
   Engine RPM : 1255 rpm
   Battery voltage : 14.16 V
   Throttle valve angle relative to throttle valve stop : 3.91 %
   Record number : 2
   Odometer : 48420.7 mi
   Absolute Time : 9004173
   Speed : 0.0 mph
   Engine RPM : 1255 rpm
   Battery voltage : 13.81 V
   Throttle valve angle relative to throttle valve stop : 3.66 %

Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #4 on: May 15, 2024, 04:59:50 AM »
I'm considering a servo buddy. Here is a short and shakey video of the servo on my bike after today's redux of cleaning and lubing the shaft that's under the spring.

The servo has movement, but the GS-911 still gives an error, and is unable to actuate the flap.

https://youtu.be/aEFRubd1PGw

WayneC

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Re: Servo Motor - Clearing Code Problem
« Reply #5 on: May 15, 2024, 12:30:23 PM »
I'm considering a servo buddy. Here is a short and shakey video of the servo on my bike after today's redux of cleaning and lubing the shaft that's under the spring.

The servo has movement, but the GS-911 still gives an error, and is unable to actuate the flap.

https://youtu.be/aEFRubd1PGw

GS911 is simply calling up the routine in the bike ECU firmware to operate the servo & the ECU is unable to fully open it so it would seem time to replace the servo or eliminate it

I can understand the thought of eliminating the servo & fooling the ECU that it is there & operating, we do the same on US F650GS singles with a fuel tank vent actuator which only takes a rather low cost resistor.

The ECU is reporting the servo position so I would expect more than a resistor would be needed to stop all fault codes, the Servo Buddy seems a little expensive & I would want to know far more than I can see online in terms of what you get for the $US70 price tag

The Servo Eliminator is a little more forthcoming on what is in the product
https://healtech.co.uk/shop/exhaust-servo-eliminator-ese/
« Last Edit: May 15, 2024, 12:38:40 PM by WayneC »

Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #6 on: May 15, 2024, 06:10:55 PM »
Thanks for the tip, the servo eliminator does look like the better option. I'm just trying to figure out if my USA 2016 RT is Euro 3 or 4 compliant.
« Last Edit: May 15, 2024, 06:35:14 PM by Twempie »

WayneC

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Re: Servo Motor - Clearing Code Problem
« Reply #7 on: May 16, 2024, 02:47:28 PM »
Thanks for the tip, the servo eliminator does look like the better option. I'm just trying to figure out if my USA 2016 RT is Euro 3 or 4 compliant.

Yes the EU3/4 aspect crossed my mind as well, not sure how to work that out, VIN Decode or GS911 Autoscan are possibilities, Vehicle Order in Autoscan seems the most likely to have the answer

Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #8 on: May 16, 2024, 07:06:48 PM »
Thanks for the tip, the servo eliminator does look like the better option. I'm just trying to figure out if my USA 2016 RT is Euro 3 or 4 compliant.

Yes the EU3/4 aspect crossed my mind as well, not sure how to work that out, VIN Decode or GS911 Autoscan are possibilities, Vehicle Order in Autoscan seems the most likely to have the answer

I've just learned that it's Euro 3 (from the BMWMOA wethead forum), but it's a moot point, as tech support from HealTech responded to my question with "all BMWs use the same ESE-BM1 unit".

More to come on this topic...


Twempie

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Re: Servo Motor - Clearing Code Problem
« Reply #9 on: May 26, 2024, 08:19:32 AM »
Servoectomy successfully completed this morning. No more error codes