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Gearbox position sensor malfunction
- Thread starter Big Mac
- Start date
Gear Position Sensor
There was a post talking about Magic Mirror magnets...VERY powerful. Some were using 2 of 3 magnets on the mirrors, opting to use the existing guide pin. It was suggested using the unused magnets on the oil filter. So close to the gear sensor, destroyed it. This may have nothing to do with you, but it's always good to know.
There was a post talking about Magic Mirror magnets...VERY powerful. Some were using 2 of 3 magnets on the mirrors, opting to use the existing guide pin. It was suggested using the unused magnets on the oil filter. So close to the gear sensor, destroyed it. This may have nothing to do with you, but it's always good to know.
opcorn:
Hypurone
Active member
My 2015 F3-S had it replaced (I had no probs with it but it came up as needing it when it was in for its first service). The campaign number was 2015-0005 & 2015-0006. Yet my buddy's 2015 F3-S made just a couple months EARLIER than mine, was not affected. I think they had a bunch of bad ones jumbled in with non-defective units so they got scattered around as to what model/year got one.... :banghead:
3 years later, and my wife's Spyder is having gear malfunctions again!!
The dealer thinks it sounds like the GPS has gone faulty again, though there are no error codes showing up and he hasn't been able to put it on BUDS yet.
Symptoms: she noticed it difficult to pull away from lights, and then spotted that the bike was in 5th gear! She struggled to convince the "-" button to drop down through the gears, but got there in the end. It has happened a few more times in the last 2 days, so it's time to get it back to the dealer I guess.
The dealer thinks it sounds like the GPS has gone faulty again, though there are no error codes showing up and he hasn't been able to put it on BUDS yet.
Symptoms: she noticed it difficult to pull away from lights, and then spotted that the bike was in 5th gear! She struggled to convince the "-" button to drop down through the gears, but got there in the end. It has happened a few more times in the last 2 days, so it's time to get it back to the dealer I guess.
stevencovert
Member
I would disagree. The GBPS is simply a potentiometer. Any dirt or moisture will give false readings. I believe the same part is on both 998 and 1330. A pot is a mechanical device that changes resistance. I wouldn't believe anything can interfere - magnets, RF, etc. On my 998 the part was simply worn - the bushings are junk plastic. It actually rattled when I took it off. Would love to see an aftermarket with a metal bushing & hermetically sealed! High failure rates on this part.
Incidentally some people found replacing the +/-/R switch assembly worked for them with random gear problems. Here, the switches in the part ARE super sealed! I replaced mine out of frustration (ongoing on the 998!) with it getting stuck in a gear or popping into Neutral and staying there. The connector is right at the nose of the bike behind the black cowling, and I can see it getting dampness and grime on it easily. After replacing mine with no luck, I read more that simply pulling the connector and spraying it with some alcohol might be more the problem than the switches themselves. On my old unit I definitely can still hear the strong clicks on all switches. Spraying them will do nothing BTW, being sealed. This makes me think that simply pulling and reconnecting the plug to clean it up a bit is what actually is fixing those issues. I even ran a test where I pushed and held the + or - running down the road for a mile or so. Any bad connection (IMHO) would have caused a gear change (?) but nothing happened. I changed it anyways - wasted $100!
Steve
billybovine
Active member
The GBPS is not a simple potentiometer. It is a hall effect transducer. That works by changes in the magnetic field.
I agree. I took our GPS off a few days ago and measured the resistance between the 3 pins — it didn't behave anything like a potentiometer.
stevencovert
Member
Well that might explain some things! Guess I better check for myself rather than my local tech 
The schematic for the bike confirms that the GBPS is indeed a Hall Effect Transducer (https://www.electronics-tutorials.ws/electromagnetism/hall-effect.html). If I still had it off the bike I guess I would test it by applying a voltage to pins 1 & 3 and then sensing the voltage at pin 2 while turning the spindle? Or is the magnet in the gearbox?
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