P2301 Fault code
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From: CARDIFF UK
P2301 Fault code
Hi - 2014 FLHTK only running on rear cylinder only.
Fault code is P2301 - front ignition coil high/shorted. Changed the coil but fault remains. Anyone help out with wiring colours/pins as I do not have access to any wiring diagrams. Bike was working perfectly one day and the next day when I tried to start it the fault was there? Bike done 18k miles and been dealer maintained all its life.
Appreciate any help
Steve
Fault code is P2301 - front ignition coil high/shorted. Changed the coil but fault remains. Anyone help out with wiring colours/pins as I do not have access to any wiring diagrams. Bike was working perfectly one day and the next day when I tried to start it the fault was there? Bike done 18k miles and been dealer maintained all its life.
Appreciate any help
Steve
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From: CARDIFF UK
No - bike not been in the rain for a while and I haven't washed it recently either. Just had all the tank off and checked the wires from the coil to the ECU and all seem good to me. Hope its not a faulty ECU
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From: USA
From the 2014 Elec Diag Man
DTC P2301 - Ignition Coil Driver Shorted High (Front)
Possible Causes - Ignition coil malfunction or Short to voltage in signal circuit
1. Ignition coil shorted to voltage test.
1. Turn IGN OFF
2. Disconnect ignition coil (connector 83)
3. Turn IGN ON
4. Using Harness connector Test Kit test voltage between 83B terminal D (GN/BE wire) and ground.
5. Is voltage greater that 5.0 volts?
a. Yes - repair short to voltage in (GN/BE) wire.
b. No - Go to test 2
2. Open Test
1. Test resistance between (83A) terminals A and D
2. Is resistance greater than 0.4 ohms?
a. Yes - replace ECM
b. No - replace ignition coil
You should be able to go to the Harley Davidson Service Information Portal https://serviceinfo.harley-davidson....cle/lookupForm enter your VIN
and find the wiring diagrams for your bike. I'm not sure if you'll have to change countries to the UK as I'm in the US
DTC P2301 - Ignition Coil Driver Shorted High (Front)
Possible Causes - Ignition coil malfunction or Short to voltage in signal circuit
1. Ignition coil shorted to voltage test.
1. Turn IGN OFF
2. Disconnect ignition coil (connector 83)
3. Turn IGN ON
4. Using Harness connector Test Kit test voltage between 83B terminal D (GN/BE wire) and ground.
5. Is voltage greater that 5.0 volts?
a. Yes - repair short to voltage in (GN/BE) wire.
b. No - Go to test 2
2. Open Test
1. Test resistance between (83A) terminals A and D
2. Is resistance greater than 0.4 ohms?
a. Yes - replace ECM
b. No - replace ignition coil
You should be able to go to the Harley Davidson Service Information Portal https://serviceinfo.harley-davidson....cle/lookupForm enter your VIN
and find the wiring diagrams for your bike. I'm not sure if you'll have to change countries to the UK as I'm in the US
Thread Starter
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Advanced
Joined: May 2012
Posts: 71
Likes: 5
From: CARDIFF UK
From the 2014 Elec Diag Man
DTC P2301 - Ignition Coil Driver Shorted High (Front)
Possible Causes - Ignition coil malfunction or Short to voltage in signal circuit
1. Ignition coil shorted to voltage test.
1. Turn IGN OFF
2. Disconnect ignition coil (connector 83)
3. Turn IGN ON
4. Using Harness connector Test Kit test voltage between 83B terminal D (GN/BE wire) and ground.
5. Is voltage greater that 5.0 volts?
a. Yes - repair short to voltage in (GN/BE) wire.
b. No - Go to test 2
2. Open Test
1. Test resistance between (83A) terminals A and D
2. Is resistance greater than 0.4 ohms?
a. Yes - replace ECM
b. No - replace ignition coil
You should be able to go to the Harley Davidson Service Information Portal https://serviceinfo.harley-davidson....cle/lookupForm enter your VIN
and find the wiring diagrams for your bike. I'm not sure if you'll have to change countries to the UK as I'm in the US
DTC P2301 - Ignition Coil Driver Shorted High (Front)
Possible Causes - Ignition coil malfunction or Short to voltage in signal circuit
1. Ignition coil shorted to voltage test.
1. Turn IGN OFF
2. Disconnect ignition coil (connector 83)
3. Turn IGN ON
4. Using Harness connector Test Kit test voltage between 83B terminal D (GN/BE wire) and ground.
5. Is voltage greater that 5.0 volts?
a. Yes - repair short to voltage in (GN/BE) wire.
b. No - Go to test 2
2. Open Test
1. Test resistance between (83A) terminals A and D
2. Is resistance greater than 0.4 ohms?
a. Yes - replace ECM
b. No - replace ignition coil
You should be able to go to the Harley Davidson Service Information Portal https://serviceinfo.harley-davidson....cle/lookupForm enter your VIN
and find the wiring diagrams for your bike. I'm not sure if you'll have to change countries to the UK as I'm in the US
I have 2 coils and both read about 0.8 ohms between Pins A&D so I assume these are both OK.
Thank you for the link to the Service Portal - I was not aware of such a thing
Regards
Steve
Last edited by harleysteve; Jun 12, 2018 at 02:54 PM. Reason: spelling
Stellar HDF Member
Joined: Sep 2013
Posts: 3,492
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From: USA
I'm just GUESSING but can you unplug the coil (83B) & also unplug (78B1) from the ECM. I think that should isolate the GN/BE wire from any power source. IF the GN/BE wire still reads 9v, then I would look to see if possibly the GN/BE is chaffed along with the R/GN (83B pin 1). I don't have any experience with checking this but it looks like the R/GN (83B pin 1) is "system power" and it comes from the ECM (78B2 pin 16). According to the 14 Elec Diag Man the R/GN wire should have battery voltage.
Good luck
Good luck
OK tested voltage between Pin D/83B and ground and its about 9v (Pin C/83B and ground for the rear cylinder is about 3.5v). I checked the wire between Pin D 83A and pin 2 on the ECU connector (78B1) and there is good continuity. I am unsure where a short to the voltage in the GN/BE wire could be??
I have 2 coils and both read about 0.8 ohms between Pins A&D so I assume these are both OK.
Thank you for the link to the Service Portal - I was not aware of such a thing
Regards
Steve
I have 2 coils and both read about 0.8 ohms between Pins A&D so I assume these are both OK.
Thank you for the link to the Service Portal - I was not aware of such a thing
Regards
Steve
If you have a short to voltage while checking it when it is connected to the ECM, but not while checking continuity from the ECM connector to Coil connector (Because you have them both unplugged), also when you say good continuity what is the actual Ohm reading? Should be between 0.01 to 0.09 or 0.1, if you are up around 1.0 or more then there is a problem with that wire or the pins at either end, if it's within specs then, I would say the Coil Driver inside the ECM is where your short is. I have changed many ECM's on Mainly Ford Escapes and Fusions for this very reason.
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Thread Starter
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Joined: May 2012
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From: CARDIFF UK
I'm just GUESSING but can you unplug the coil (83B) & also unplug (78B1) from the ECM. I think that should isolate the GN/BE wire from any power source. IF the GN/BE wire still reads 9v, then I would look to see if possibly the GN/BE is chaffed along with the R/GN (83B pin 1). I don't have any experience with checking this but it looks like the R/GN (83B pin 1) is "system power" and it comes from the ECM (78B2 pin 16). According to the 14 Elec Diag Man the R/GN wire should have battery voltage.
Good luck
Good luck
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From: Lafayette La
Iv read something like this before,, and looked for the article or the forum a little bit the past couple days. And will post it if I find it but please post your findings.
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From: CARDIFF UK
So my conclusion is a duff ECU so off to a dealer we go!