Dakota Digital malfunction

[SKOGDOG]

I installed the DD after I bought the bike from Trainman. No issues until two days ago when the thing registered ‘00’ for mph no matter how fast I was going. The odo didn’t register any change either. It is intermittent. With fewer and fewer times of showing mpg. We were on I-90 all today after meeting Shamroch ((Gary) and Patti for lunch. We rode from Sturgis to Sioux City, probably around 500 miles, and the Speedo/odo registers like 5 or 5 miles. I took out the sensor and it was clean. Bcs I’m dumb and suspicious, I also took off the batt cables to reboot, and NK Big Mike suggested running it thru the cycles. No differences.
Any ideas?

 

[Mastiff Rider64]

Thats what my original speedo did when it crapped out on me, I wonder 2 things:

1- is it defective from the factory (unlikely but possible)
2- if a connection either under the tank or the one that plugs into the DD came loose
3- and hopefully not this but EHC starting to mess up (but can't remember if speed sensor goes thru the EHC)

 

[Rottweiler]

On the 2004 model the speed sensor only gets power from the EHC. The single output goes directly to the speedo. Not through the EHC.

 

[Rottweiler]

You could unplug the sensor and check for 12vdc.

 

[SKOGDOG]

Update: Rottweiler wins the chicken dinner!
I called the smartest electronics guy I know —-New Jersey Big Mike (who curiously enough lives in Murrell‘s Inlet, SC) and he walked me thru the diagnostics. Used a volt meter to check for output from the sensor then the speedo. We determined the sensor was outputting data up to the speedo. I then called Dakota Digital and got a Techie who insisted he’d never seen an instance in which a speedo reading ‘00’ was defective. He insisted the speedo was just waiting for a usable data flow. Mike had talked me thru getting a voltmeter reading from the green wire (3 wires: red=hot; black=ground; green=info sent from sensor to speedo). Mine was sending data (spin rear tire w/ignition on). It started at 12 volts and then danced all over from 6 or so up to 11 or 12. I assumed bcs it was sending data it was good.
DD Tech asked me to read him the voltages and said “That’s your problem! No zeros.—if the sensor doesn’t send a zero between each number when you spin the back tire very slowly—the sensor is defective. So I went to Blacktopper’s shop and installed my sensor in his old 2007 K9 and sure enough—zeros on the DD speedo.
Then the next day I remembered that we have a spare transmission at Blacktopper’s shop and asked him go check, and sure enough, it had a sensor. That saved $100. I got that today and now the speedo registers mph. I’ll turn over the defective one to Big Mike at Dave’s Farm next month so he can autopsy the damn thing. Re-assembly of the speedo gave me fits until I glued the little spacer in place—just used silicone and left it overnight to set up.
LESSON LEARNED: If the DD reads double zeros, check the output of the sensor with a voltmeter using a pin in the back of the jst connector. Spin the tire slowly and if there are no zeros between the data points, the speed sensor failed, even tho it has output. If you are very thorough, take out the speedo from the housing and stick a hatpin in the green wire receptacle to measure voltage (gently work out the plug from behind the just connector with a pick-first one side then the other). That way you’ll be confident the signal isn’t lost to a grounded or broken wire in the backbone somewhere.

 

[Mastiff Rider64]

Update: Rottweiler wins the chicken dinner!
I called the smartest electronics guy I know —-New Jersey Big Mike (who curiously enough lives in Murrell‘s Inlet, SC) and he walked me thru the diagnostics. Used a volt meter to check for output from the sensor then the speedo. We determined the sensor was outputting data up to the speedo. I then called Dakota Digital and got a Techie who insisted he’d never seen an instance in which a speedo reading ‘00’ was defective. He insisted the speedo was just waiting for a usable data flow. Mike had talked me thru getting a voltmeter reading from the green wire (3 wires: red=hot; black=ground; green=info sent from sensor to speedo). Mine was sending data (spin rear tire w/ignition on). It started at 12 volts and then danced all over from 6 or so up to 11 or 12. I assumed bcs it was sending data it was good.
DD Tech asked me to read him the voltages and said “That’s your problem! No zeros.—if the sensor doesn’t send a zero between each number when you spin the back tire very slowly—the sensor is defective. So I went to Blacktopper’s shop and installed my sensor in his old 2007 K9 and sure enough—zeros on the DD speedo.
Then the next day I remembered that we have a spare transmission at Blacktopper’s shop and asked him go check, and sure enough, it had a sensor. That saved $100. I got that today and now the speedo registers mph. I’ll turn over the defective one to Big Mike at Dave’s Farm next month so he can autopsy the damn thing. Re-assembly of the speedo gave me fits until I glued the little spacer in place—just used silicone and left it overnight to set up.
LESSON LEARNED: If the DD reads double zeros, check the output of the sensor with a voltmeter using a pin in the back of the jst connector. Spin the tire slowly and if there are no zeros between the data points, the speed sensor failed, even tho it has output. If you are very thorough, take out the speedo from the housing and stick a hatpin in the green wire receptacle to measure voltage (gently work out the plug from behind the just connector with a pick-first one side then the other). That way you’ll be confident the signal isn’t lost to a grounded or broken wire in the backbone somewhere.

Glad you got it fixed

 

[Jersey Big Mike]

Update: Rottweiler wins the chicken dinner!
I called the smartest electronics guy I know —-New Jersey Big Mike (who curiously enough lives in Murrell‘s Inlet, SC) and he walked me thru the diagnostics. Used a volt meter to check for output from the sensor then the speedo. We determined the sensor was outputting data up to the speedo. I then called Dakota Digital and got a Techie who insisted he’d never seen an instance in which a speedo reading ‘00’ was defective. He insisted the speedo was just waiting for a usable data flow. Mike had talked me thru getting a voltmeter reading from the green wire (3 wires: red=hot; black=ground; green=info sent from sensor to speedo). Mine was sending data (spin rear tire w/ignition on). It started at 12 volts and then danced all over from 6 or so up to 11 or 12. I assumed bcs it was sending data it was good.
DD Tech asked me to read him the voltages and said “That’s your problem! No zeros.—if the sensor doesn’t send a zero between each number when you spin the back tire very slowly—the sensor is defective. So I went to Blacktopper’s shop and installed my sensor in his old 2007 K9 and sure enough—zeros on the DD speedo.
Then the next day I remembered that we have a spare transmission at Blacktopper’s shop and asked him go check, and sure enough, it had a sensor. That saved $100. I got that today and now the speedo registers mph. I’ll turn over the defective one to Big Mike at Dave’s Farm next month so he can autopsy the damn thing. Re-assembly of the speedo gave me fits until I glued the little spacer in place—just used silicone and left it overnight to set up.
LESSON LEARNED: If the DD reads double zeros, check the output of the sensor with a voltmeter using a pin in the back of the jst connector. Spin the tire slowly and if there are no zeros between the data points, the speed sensor failed, even tho it has output. If you are very thorough, take out the speedo from the housing and stick a hatpin in the green wire receptacle to measure voltage (gently work out the plug from behind the just connector with a pick-first one side then the other). That way you’ll be confident the signal isn’t lost to a grounded or broken wire in the backbone somewhere.

Well from birth till 2015 I DID live in NJ and since I created my account while I was in NJ it made sense at the time. I was after just Big Mike but that was taken so the system told me, hence the addition of Jersey.
Glad I could help Rick.