Jedlacks
Posts: 118
Joined: Sun Dec 14, 2014 12:10 pm
Delivery Date: 29 May 2016
Leaf Number: 300863
Location: Kennesaw, GA

Re: Warning: Defective Konnwei KW-902 on the market

Wed Apr 12, 2017 2:24 pm

I measured the resistance on mine and it read 121.2 ohms. I had it plugged in all the time until a few weeks ago, because it was sucking my battery down. With it plugged in my resting battery level was at 12.45+/- volts, and that caused the Nissan Connect not to work. I since put the battery on a slow charge for a few hours and my "first world problem" is now behind me :D
2015 SV QC/LED
Juicebox 40A

DarthBane
Posts: 2
Joined: Wed Apr 12, 2017 6:29 pm
Delivery Date: 04 Mar 2017

Re: Warning: Defective Konnwei KW-902 on the market

Wed Apr 12, 2017 6:36 pm

Hi Turbo, this is Frank (the 1st unlucky one to have a defective Konnwei, we talked via email).
So I have 2 bad ones now, one from Aliexpress and one from Amazon. I saw the fix, removing the little resistance you show on the picture... I did that, but, before I go ahead and brick my Leaf, I'd like to see if I did this correctly:
1st off, I could barely see anything there, we are talking microscopic almost! Anyways, I saw something, and flicked it off with my fingernail, and it came out. Really small stuff.
Then I re-tested the resistance, and now the needle does not move at all when testing pin #6 to pin #14. Is that a good sign, or should it have gone back to 120 ohms?
If this is right, then I will plug it in and see what happens. I'll probably fix the 2nd one too instead of returning it, I could use it with Torque on my other car I guess.
Thanks for all the help!

Turbo3
Gold Member
Posts: 1778
Joined: Mon Jul 19, 2010 8:34 pm
Delivery Date: 12 May 2011
Leaf Number: 002191
Location: San Jose, CA

Re: Warning: Defective Konnwei KW-902 on the market

Wed Apr 12, 2017 8:43 pm

DarthBane wrote:Hi Turbo, this is Frank (the 1st unlucky one to have a defective Konnwei, we talked via email).
So I have 2 bad ones now, one from Aliexpress and one from Amazon. I saw the fix, removing the little resistance you show on the picture... I did that, but, before I go ahead and brick my Leaf, I'd like to see if I did this correctly:
1st off, I could barely see anything there, we are talking microscopic almost! Anyways, I saw something, and flicked it off with my fingernail, and it came out. Really small stuff.
Then I re-tested the resistance, and now the needle does not move at all when testing pin #6 to pin #14. Is that a good sign, or should it have gone back to 120 ohms?
If this is right, then I will plug it in and see what happens. I'll probably fix the 2nd one too instead of returning it, I could use it with Torque on my other car I guess.
Thanks for all the help!

No, it will not be 120 ohms. I just measured my working one without the resistor and get about 27.5 K ohms. I think you are OK to install it.

DarthBane
Posts: 2
Joined: Wed Apr 12, 2017 6:29 pm
Delivery Date: 04 Mar 2017

Re: Warning: Defective Konnwei KW-902 on the market

Mon Apr 17, 2017 9:30 am

Ok, confirmed working after removing the 20 ohms resistance. Changed the door unlock method and it worked, great, thanks a lot for all the info! Now I have 2 working Konnwei units!

chivalryx
Posts: 34
Joined: Mon Jul 04, 2016 3:38 pm
Delivery Date: 04 Jul 2016
Location: Coquitlam, BC

Re: Warning: Defective Konnwei KW-902 on the market

Thu May 04, 2017 12:47 pm

FYI. The KW-902 Wifi versions are also affected. Unfortunately the board is very different from the original post, so I'm unsure which resistor to remove. Didn't help that the build quality was poor, so one wire had come loose of the solder point and was just hanging there...
2013 White Pearl SV (No quick charge)
Weathertech custom floormats
Aftermarket LED Headlight upgrade (45W 4800 lumen/bulb)
12V 20Ah Prismatic LiFeMnPO4 Lead Acid replacement
Aftermarket Rear Backup Camera wired to NAV

des28
Posts: 4
Joined: Tue Apr 11, 2017 2:49 am
Delivery Date: 05 May 2017

Re: Warning: Defective Konnwei KW-902 on the market

Fri May 05, 2017 10:20 pm

You may be able to follow the tracks from the pins, or look for this same chip as in the attached image, resistor is likely to be right beside it on pins 2/3 as it is with this one. You can measure the 120 ohm / 20 ohm right at that point too.

Cheers,
Des

Image

Battlewind
Posts: 4
Joined: Sat May 20, 2017 5:18 pm
Delivery Date: 21 May 2017
Leaf Number: 403651

Re: Warning: Defective Konnwei KW-902 on the market

Sat May 20, 2017 5:21 pm

First post!

First off, thanks for the recommendation on the adaptor. Second, thanks for the warning on this. I too ordered one from Amazon and it came in with a 20 ohm resistor.

As I read this, my options are to either return it or desolder the 20 ohm resistor correct? If I do return it, how many time have others done this in the past before getting a good one?

Thanks!

Battlewind
Posts: 4
Joined: Sat May 20, 2017 5:18 pm
Delivery Date: 21 May 2017
Leaf Number: 403651

Re: Warning: Defective Konnwei KW-902 on the market

Tue May 23, 2017 6:41 pm

I ended up sending it back for a refund. I couldn't get it to work properly. I had an older ELM327 that ended up working fine once I turned off the car's bluetooth. Now I have to figure out why they won't work together.

baustin
Posts: 429
Joined: Tue Feb 24, 2015 1:23 pm
Delivery Date: 09 Mar 2015
Leaf Number: 402162
Location: North Las Vegas, NV

Re: Warning: Defective Konnwei KW-902 on the market

Tue May 23, 2017 7:19 pm

Battlewind wrote:I ended up sending it back for a refund. I couldn't get it to work properly. I had an older ELM327 that ended up working fine once I turned off the car's bluetooth. Now I have to figure out why they won't work together.


Your phone can only connect to one device at a time. The bluetooth connection to the car is automatic when it turns on. This prevents the connection for LeafSpy from working. I use a separate tablet for LeafSpy, so that I don't have that problem.
2013 Leaf SV - Cayenne Red - QC Port - LED Headlights

magico13
Posts: 51
Joined: Thu Dec 22, 2016 12:39 pm
Location: Cleveland, OH

Re: Warning: Defective Konnwei KW-902 on the market

Wed May 24, 2017 7:35 am

baustin wrote:Your phone can only connect to one device at a time. The bluetooth connection to the car is automatic when it turns on. This prevents the connection for LeafSpy from working. I use a separate tablet for LeafSpy, so that I don't have that problem.


That might be true for their phone, but is not a general truth. LeafSpy works fine with my phone also playing music through the car while also connected to my watch. Bluetooth is supposed to work with multiple devices at the same time, at least as long as they have different functions.
2015 SV w/ QC

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