OneStyle
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Joined: Thu May 23, 2019 3:16 am

Onboard Charger (OBC) Failure - P1AFE

Thu May 23, 2019 3:26 am

My mom was car shopping last December and I found out about the iMiev and I liked it and I convinced my mom with it. I looked on craigslist everyday until one day I found a very nice 2012 fully packaged iMiev with only 38k miles on it for $5,500. We go check it out and we liked it and drove it back home.

About a week ago, while attempting to charge it at home using the original EVSE, the car disconnects charging about 30 seconds after plugging it in. We took it to our local Mitsubishi dealership and after 2 weeks of testing they find out the the OBC needs replacement with error code P1AFE. A $5000 replacement, same as what we paid for the car. I tried calling Mitsubishi customer relations to see if they can help with any of the costs as the car has very low miles on it and they refuse to help.

I don't know what to do right now so any advice on this would be appreciated

kiev
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Re: Onboard Charger (OBC) Failure - P1AFE

Thu May 23, 2019 5:41 am

Howdy OneStyle, welcome to the forum. Where are you located?

Sorry to hear about your charging issue, maybe it can be resolved for much less cost.

The P1AFE trouble code indicates an issue with the DC Quick Chargger and not the OBC. The DTC set conditions for this code are given in the diagnostics section of the Factory Service Manual:

After the quick contactor is driven, if the quick chargger error signal from the quick chargger is ON, the diagnosis code No. P1AFE will be set.


So possibly there is also an OBC error code, but it is not this one. The dealer service department hasn't given you consistent information with their diagnostics. The OBC is not involved in DC Quick Chargge at all, and DC QC is not involved in using the OEM Level I EV SE at all.

We have had dozens of OBC failures reported on this forum and the most common problem is a blown fuse in the Motor Control Unit (MCU) and two small capacitors blown in the OBC. These can be replaced and get the OBC working again.
kiev = kenny's innovative electric vehicle

OneStyle
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Joined: Thu May 23, 2019 3:16 am

Re: Onboard Charger (OBC) Failure - P1AFE

Thu May 23, 2019 5:50 am

Hey Kiev,

Thank you for replying.

kiev wrote:Where are you located?


Am located in LA, California.

kiev wrote:The P1AFE trouble code indicates an issue with the DC Quick Chargger and not the OBC. The DTC set conditions for this code are given in the diagnostics section of the Factory Service Manual:

After the quick contactor is driven, if the quick chargger error signal from the quick chargger is ON, the diagnosis code No. P1AFE will be set.


That's actually weird because the car charges fine from the CHAdeMO port. The issue is only with the level 1 and level 2 port.

After I plug in the original EVSE charger (level 1), the charging disconnects after 20-30 seconds. I tried an EVGO level 2 charger, the car detects it but doesn't charge.

kiev wrote:We have had dozens of OBC failures reported on this forum and the most common problem is a blown fuse in the Motor Control Unit (MCU) and two small capacitors blown in the OBC. These can be replaced and get the OBC working again.


I also thought it could be a fuse (I hope it is). Do you have any information on how I can have those replaced?

Thanks again!

JoeS
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Re: Onboard Charger (OBC) Failure - P1AFE

Thu May 23, 2019 5:34 pm

OneStyle, so very sorry to hear that your astute purchase has now gone sour. These cars have been the model of reliability and the relatively-recent worldwide rash of OBC/dc-dc failures is seriously worrisome.

As you found out, replacement of the OBC/dc-dc with a new one from Mitsubishi is cost-prohibitive.

First, some testing needs to be done to confirm that the OBC/dc-dc and/or the fuse (located in the motor controller) are your culprits, and if it's the OBC/dc-dc then there are two alternatives -

1. Find a used OBC/dc-dc and replace your original

2. Remove the original and try to repair it yourself or get it repaired.

Before we go any further, how comfortable are you with rolling up your sleeves and tackling a project such as removal of a subassembly or taking one apart and troubleshooting it? Do you have any techie friends who might help?

Tell you what - I have a used OBC/dc-dc that's out of a wrecked 2016 i-MiEV and I'd be willing to swap it with yours. As I understand it, there are some plumbing changes required to make it work but otherwise it's compatible. Someone on this forum did this but I couldn't find the thread where this is discussed.

Anyway, let's keep an open dialog and see if we can get your i-MiEV back on the road.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

OneStyle
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Joined: Thu May 23, 2019 3:16 am

Re: Onboard Charger (OBC) Failure - P1AFE

Thu May 23, 2019 11:00 pm

Hey JoeS

Thanks for your suggestions.

JoeS wrote:Before we go any further, how comfortable are you with rolling up your sleeves and tackling a project such as removal of a subassembly or taking one apart and troubleshooting it? Do you have any techie friends who might help?


My uncle is an electrical engineer, so he can help me with that.

JoeS wrote:Tell you what - I have a used OBC/dc-dc that's out of a wrecked 2016 i-MiEV and I'd be willing to swap it with yours. As I understand it, there are some plumbing changes required to make it work but otherwise it's compatible. Someone on this forum did this but I couldn't find the thread where this is discussed.


We can do that if am not able to fix it.

kiev
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Re: Onboard Charger (OBC) Failure - P1AFE

Fri May 24, 2019 2:34 am

Take a look at this thread, there is pictures and information about successful repairs to the OBC

Troubleshooting and Repair of the OBC
kiev = kenny's innovative electric vehicle

OneStyle
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Joined: Thu May 23, 2019 3:16 am

Re: Onboard Charger (OBC) Failure - P1AFE

Mon Jun 10, 2019 3:39 pm

So my uncle opened the OBC and we found a blown resistor and capacitor and replaced them but no luck. There is another component that he tested and it doesn't work but he doesn't know what is it.
Image

Thanks!

kiev
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Location: The Heart o' Dixie
Contact: Website

Re: Onboard Charger (OBC) Failure - P1AFE

Mon Jun 10, 2019 4:46 pm

That is a lightning surge arrestor on the AC input side.

Which resisitor and capacitor were damaged, can you post a picture or give us the reference designators, e.g. R21 or C117.
kiev = kenny's innovative electric vehicle

kiev
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Joined: Sun May 03, 2015 7:15 am
Location: The Heart o' Dixie
Contact: Website

Re: Onboard Charger (OBC) Failure - P1AFE

Mon Jun 10, 2019 4:48 pm

First time we have seen or heard of that failure, but hopefully an easy repair.
kiev = kenny's innovative electric vehicle

OneStyle
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Joined: Thu May 23, 2019 3:16 am

Re: Onboard Charger (OBC) Failure - P1AFE

Tue Jun 11, 2019 12:01 am

Hello kiev,

Those are the ones we replaced
Image

I'm also skeptical of those wires
Image
Also the cover looks smoked right above them
Image

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