Ignition Coil Testing
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From: Honah Lee
Those ohm readings sounds close. It really possible now it's not getting a signal from CKP. (Crank position sensor next to oil filter) Error code p0373 or p0374
Coil is not going to fire till it knows were pistons are. No more fixed distributor these days. It a very low voltage coil that the notches and keys on the crank shaft wheel spins by it is read by ECM.. Needs so many counts and the missing key go by.
What started this problem? Wiring and fuse box clean? Doesn't take much for the connection for the CKP to not work.
Has the bike got a piggyback tuner on it?
Last edited by Jackie Paper; Nov 22, 2023 at 05:42 PM.
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From: poway
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From: backwoods
I think there is a lot of trouble shooting that can be done, but it is also 15 year old part, so never hurts to replace.
My 01 is on the 3rd coil, but 07 is on stock. If I rip engine down this winter, I may replace it when tank is off.
My 01 is on the 3rd coil, but 07 is on stock. If I rip engine down this winter, I may replace it when tank is off.
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Joined: Apr 2017
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From: Waxhaw, NC
Just had a chance to jump back into this project. I got a P0374 error code. P0374 CKP Sensor Synch Error. Gonna do some research on this. Any help or suggestions would be appreciated. I did print out your sheets using breakbox. Thanks for that!
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From: poway
You can get that error if you spent a lot of time cranking and the motor doesn't start. Crank sensor could be bad tho.. One thing to do is listen for the fuel pump to run on after cranking for a few seconds. If it don't then the crank sensor or it's connections could be bad.
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From: Honah Lee
The key on few seconds run of the fuel pump is the timer from the ECM running it. Once the engine cranks enough (apx 1 turn) it gets the signal from ECM to provide ground for the fuel pump relay and it runs all the time.
That's a check for sure CKP is working. Probably can't hear pump. Your going to have to put you volt meter on it to know it.
Since your coil checked out plenty close, bet it's the CKP. Even if I didn't check anymore, that's the first $ I would throw at it. (Lot cheaper then coil)
However, I would pop the console and put my meter on it fuel pump lead. Or pick it up on the fuel pump relay power. If it's the CKP, even then I would check it's low voltage connector and wipe the end off the CKP itself.
You don't want to replace good parts. If good, there probably way better then what you are going to get these days. Even a dealership may sell you knockoff China stuff.
That's a check for sure CKP is working. Probably can't hear pump. Your going to have to put you volt meter on it to know it.
Since your coil checked out plenty close, bet it's the CKP. Even if I didn't check anymore, that's the first $ I would throw at it. (Lot cheaper then coil)
However, I would pop the console and put my meter on it fuel pump lead. Or pick it up on the fuel pump relay power. If it's the CKP, even then I would check it's low voltage connector and wipe the end off the CKP itself.
You don't want to replace good parts. If good, there probably way better then what you are going to get these days. Even a dealership may sell you knockoff China stuff.
Last edited by Jackie Paper; Nov 24, 2023 at 01:55 PM.
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From: poway
The key on few seconds run of the fuel pump is the timer from the ECM running it. Once the engine cranks enough (apx 1 turn) it gets the signal from ECM to provide ground for the fuel pump relay and it runs all the time.
That's a check for sure CKP is working. Probably can't hear pump. Your going to have to put you volt meter on it to know it.
Since your coil checked out plenty close, bet it's the CKP. Even if I didn't check anymore, that's the first $ I would throw at it. (Lot cheaper then coil)
However, I would pop the console and put my meter on it fuel pump lead. Or pick it up on the fuel pump relay power. If it's the CKP, even then I would check it's low voltage connector and wipe the end off the CKP itself.
That's a check for sure CKP is working. Probably can't hear pump. Your going to have to put you volt meter on it to know it.
Since your coil checked out plenty close, bet it's the CKP. Even if I didn't check anymore, that's the first $ I would throw at it. (Lot cheaper then coil)
However, I would pop the console and put my meter on it fuel pump lead. Or pick it up on the fuel pump relay power. If it's the CKP, even then I would check it's low voltage connector and wipe the end off the CKP itself.
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From: backwoods
If I was just going to replace parts on 15 year old bike I would start with CPK and coil. If you replace CPk tape a piece of weed wacker line, and pull it through when you pull old one out, then tape it new cpk wires and pull back. the dueutsch pins are fun.
Though with fuel injection, there are other things it can be.
For your age of bike you can probably find an electric manual on ebay for $40-50. I bought some manuals last year for that, with shipping. They don't look look like there were used.
Though with fuel injection, there are other things it can be.
For your age of bike you can probably find an electric manual on ebay for $40-50. I bought some manuals last year for that, with shipping. They don't look look like there were used.