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Old 06-20-2006, 10:10 PM   #1 (permalink)
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Diagnostic Trouble Code

I recently checked the codes on my 04 RKC. I found that it showed that it had a P0374 error. I looked up the code and found it was CKP Sensor Synch Error EFI. Does anyone know what this code means or what the problem is. I did notice that the check engine light remained on for a few seconds after the bike is started. I am not sure if this is related or not. Thanks for you help.
Brian
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Old 06-21-2006, 08:56 PM   #2 (permalink)
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Is your bike slow to start, has to turn over for more than five seconds before it runs? This code sets when the ECM does not see a clean signal from the crankshaft sensor during startup, and maybe running, but you would probably notice bad running, etc. The CKP is a high resistance, low voltage device and as such, all connections must be water tight, clean and tight for the signals to reach the ECM. The '04 touring electrical manual gives a pretty long diagnoses chart that refers to measuring the CKP sensor circuit from the ECM with a good DVOM that will read resistance in the range over 1 megohm. Basically, the CKP circuit is on pins 12 & 30 at the ECM. Any thing reading over 1 megohm will cause the code to set if the bike does not start after 5 seconds. Also, if you check it yourself, the CKP will make a small AC voltage at the above numbered pins while cranking the engine if it is in good shape. This kind of tracing really requires the manual.... OR you could just change the CKP sensor if you feel lucky....just my .02
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Old 06-21-2006, 11:21 PM   #3 (permalink)
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Thanks, I reset the code and it has not come back. The bike runs great and I do not have any motor problems. If it comes back I guess I will replace the sensor. Thanks a ton for your help.
Brian
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Old 06-21-2006, 11:21 PM   #4 (permalink)
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Totenkopf is reading this now saying WTF is this?
The Check Engine light staying on after start is indicating there is a DTC to be read.
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Old 06-22-2006, 12:28 AM   #5 (permalink)
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Wow!!!

Quote:
Originally Posted by Rkpickett
Is your bike slow to start, has to turn over for more than five seconds before it runs? This code sets when the ECM does not see a clean signal from the crankshaft sensor during startup, and maybe running, but you would probably notice bad running, etc. The CKP is a high resistance, low voltage device and as such, all connections must be water tight, clean and tight for the signals to reach the ECM. The '04 touring electrical manual gives a pretty long diagnoses chart that refers to measuring the CKP sensor circuit from the ECM with a good DVOM that will read resistance in the range over 1 megohm. Basically, the CKP circuit is on pins 12 & 30 at the ECM. Any thing reading over 1 megohm will cause the code to set if the bike does not start after 5 seconds. Also, if you check it yourself, the CKP will make a small AC voltage at the above numbered pins while cranking the engine if it is in good shape. This kind of tracing really requires the manual.... OR you could just change the CKP sensor if you feel lucky....just my .02
Now...I am impressed!! Really...I am!! This Mr. RK is exactly why I love this forum!! Ya know...(I think I'm gonna cry!). I have saved boatloads of hard earned cash by all the great advice that you all give on this site! I for one appreciate it!! There's also a lot of complaining going on...but that OK too!! That makes it fun!! How bout' a group hug!!
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