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knock sensor 2 defective

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ihosc:
Hi Stephan,

The bike is R1200R. And below is the readout. Thanks.

BMS-K
10210: Knock-sensor 2 defective
The fault is not present now.
The problem occurred once.
Logistic counter: 27
Symptom: Unknown symtom state.
MIL set:No

FAult code history:

Engine speed 1440.00rpm
Odometer 78176.0km
Normalized reference level KR SW-Cyl. 3 0.00V
Normalized reference level KR SW-Cyl. 1 0.00V
Normalized reference level KR SW-Cyl. 0 16.25V

StephanT:
OK, let's start from the top.

what we know:
* We see it is a R1200R.
* We know it now has 78299.0 km on the odo
* We also see that the Fault codes are NOT present... now that could mean that they are intermittent OR that the problem has been addressed/fixed but the fault codes never cleared....
Now from the Fault code history we see the following:
* the fault occurred at 78176.0km - that is 123 km ago
* we also see that it occurred at 1440rpm
* we also see that the logistic counter is at 27
The logistic counter starts at 40 for most codes and then decrements every "cycle" that the fault is not present... Now what exactly a "cycle" is, is unknown... and I suspect it might differ from fault code to fault code... for some it might be ignition cycles for others it might be engine reaching operating temperature etc... (naturally it will reset back to 40 if the fault occurs again)

In either case, I suspect that fault was not repaired... BUT, that still does not mean that something needs to be done...

Next we need to consider the context... this is a knock sensor... it measures vibration.. it might have gotten a hard knock from another source (someone banged a hammer against the engine  - I hope not), or the sensor might even be loose (normally tightened to the engine with a bolt - naturally if it is loos, it will loose it's ability to "feel" the mechanical vibrations...)
On the other hand, it could be a loose or dirty connector... or poor connection...

Check all of the above (mounting, connections - maybe even clean the connections  ...then reset the code... and check it frequently...

best
Stephan

ihosc:
Hi Stephan, I'm getting the idea now in usage of this GS911 tool. I'm sure there's plenty more to learn. But this is a good start. Thank you. Now just need to google out where the hell is this knock sensor...

beemer:
Knock sensor is mounted on rear side of each cylinder.Google knock sensor R1200 and you will see how it looks like.Cylinder no.2 is left cylinder.

StephanT:
hope this helps... courtesy of http://forums.pelicanparts.com/bmw-r1100s-r1200s-tech-forum/152445-1200gs-balance-shafts-review-etc-4.html


where:

Outputs/Actuators:
* Lower Spark Plug with Pencil Coil
* Upper Spark Plug with Pencil Coil
* Fuel Injector
* Idle Actuator (Stepper motors)
Sensors/Inputs:
* Oxygen (O2) / Lambda Sensor
* Oil Pressure switch
* Camshaft position sensor
* Knock sensor
* Cylinderhead Temperature sensor - first models had one in each head... subsequent (facelifts had only a sensor in ONE side)
* TPS (Throttel Position Sensor)
* Crankshaft position sensor (RPM)
* Engine Temperature sensor
* Intake Air Temperature sensor (located in the airbox)

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