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Hello, can someone please help. I have a 2007 Honda 420 es. I had battery overheat while riding, and died. I replaced battery, now gear display only shows flashing line, so will not start. I replace shift angle sensor, same issue... what next? Thank you!!!
 

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if your battery over heated ?, chances are your reg/rec is shot ?, or worse..the stator ?, or both ?.
 

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I followed another post and tested voltage reg and stator, all ok... any other suggestions? Hopefully not ecm.....
 

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I followed another post and tested voltage reg and stator, all ok... any other suggestions? Hopefully not ecm.....
are you getting a neutral light on the dash ?, if not ?, it wont crank/fire off. was angle sensor from honda ?, or some stupid china knock-off from amzon or ebay ?. lines on dash has nothing to do with it not starting , unless !!!!, its keeping it from showing/going into neutral ?. lines just means your electric shift parts are not working right.
 

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I am showing green neutral light, but flashing where should show gear... old angle sensor tested different ohms.. New (not honda) shows about 5k ohms +/- as you spin it... Replaces ecm with used... exact same issues... found shorted wire to on/off switch on handle bar. Now turns over but no soak and no fuel... WTF?
 

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I had no clicking at all when attempting to shift so I was stuck in gear. The atv would start with hand brake on, also I could manually shift with the under seat shifter tool. This is what I did to fix my problem. I had the code 22 flash (two longs and two shorts) went to the service manual (pgs 23-19 and 23-20) to check for code 22 options and did try the angle sensor first but it wasn't that (new one didn't come with O ring), then checked the control motor which is suggested on pg 23-20 at the top. So I took off the shift control motor (3 bolts) and clean it out. That was my problem. After it was out I removed the top off the unit by undoing the two allen bolts. I saw some ugliness in there that cleaned up gently with a rag and toothbrush. There was housing corrosion and breaching of water/mud into the unit which I guess caused the no shift failure. Interestingly enough after I cleaned it up and ran a 12v test it went ok and spun quite nicely. Put it back on the bike out of curiousity and presto it cycled through the gears just fine and back to normal. I did order a new SCM though. I was glad to see that the teeth on the SCM shaft were not worn down or missing splines.
Good luck with your unit.
 
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