Update - May 2017.
Have seen recent reports from both Korea and France that newly bought KW902 adapters are working fine.*** DO NOT PLUG A NEWLY BOUGHT KONNWEI KW-902 UNTIL YOU READ THIS. ***
Turbo3 wrote:I have recently been getting reports of strange things happening (I-Key error) when newly bought Konnwei KW-902 adapters are plugged into the L eaf.
I bought one this week and got it today from A mazon and had the same problem.
On opening it up I noticed they have changed the circuit board from the board in the old one I have been using.
The problem is that on at least some they have used the wrong resistor across the CAN bus. The spec is 120 ohms across pins 6 and 14.
They are using a 20 ohm resistor which is a near short of the CAN bus. If they are using automated equipment to build their boards then they most likely loaded the wrong reel of resistors. That means there are potentially many many of these out there.
Before plugging in a newly bought Konnwei KW-902 into your L eaf please have the resistance between pins 6 and 14 measured. If it is not 120 ohms return for a replacement until you get one with the correct resistor in it.
Shorting out the CAN bus is very serious. If you experience any strange behavior when using any OBDII adapter immediately stop using it and have the resistance checked. Never drive your L eaf under these conditions.
The CAN bus is used to control the vehicle it is not just a monitoring port. The communications on the CAN bus control the L eaf and shorting it out should never be allowed.
The thread discussing this is - Warning: Defective Konnwei KW-902 on the market
Turbo3 is the author of L eafSpy. The KW902 is the recommended adapter for both that project and for the Torque Pro codes we use on the Soul EV.
I think this explains the problems SmoothJ had with his adapter. - viewtopic.php?f=6&t=471&start=300#p6155
SmoothJ wrote:I am still working on this but when I plug in my new kw902 elm327 it does not turn on. So naturally I press the button and then my car goes nuts and starts saying stop vehicle and check power supply. Even if I dont press the button it does the same thing. As soon as I remove it I have no issues with the car....
The codes for using Torque Pro can be found by clicking the link in the website icon under my user name on the left.