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Help can not connect to ECU

 
Old Mar 16, 2019, 05:33 PM
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Help can not connect to ECU

i had a break in tune on the car and I pulled the tune just fine using ECUFLash. I had a lot of issues trying to re-upload a new file. Now I canít connect to the ECU at all evo when I use a code reader it states no link. I checked all my connections and checked the fuses. My tunner thinks that it is the ECU but I donít understand why it would just die. I also have the battery hooked up to another car thinking it was low on power. I am out of options please help!!



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Old Mar 16, 2019, 05:38 PM
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check the obd connector in the car, maybe a pin got pushed out.
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Old Mar 16, 2019, 05:50 PM
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I checked all the pins everything seems solid
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Old Mar 16, 2019, 05:52 PM
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Originally Posted by Mmarlow123 View Post
I checked all the pins everything seems solid
My next move would be to verify continuity between the obd connector and the ecu connector with a DMM (Digital multimeter). You will have to search for the pin numbers. The Factory service manual contains the circuit diagrams, and you can download it for free if you search.
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Old Mar 16, 2019, 06:12 PM
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Is that easy to do for someone who does not know crap about it?
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Old Mar 16, 2019, 08:23 PM
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My IX will say that sometimes if my mini battery gets a little low. I'll idle the car for a min then hold it at 3k for 10 - 15 seconds then go key on engine off immediately & hit flash.
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Old Mar 17, 2019, 03:30 AM
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I know you mentioned you put another battery on but i had this problem once and i had to attach a portable battery charger to my battery and then connect to my ECU.
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Old Mar 17, 2019, 05:32 AM
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The car will not start to run and I tried hooking up another car and the battery charger.
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Old Mar 17, 2019, 07:30 AM
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Iím literally lost at this point I just put a brand new battery in it still nothing I checked all the fuses still nothing I checked all the pens still nothing do I have to buy a new ECU at this point.Iíve dump so much money in this car if I buy a used ECU can I flash it to this car
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Old Mar 17, 2019, 07:32 AM
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Originally Posted by Mmarlow123 View Post
Is that easy to do for someone who does not know crap about it?
It's not hard, but you would need to pull out the ecu and unplug it then put the DMM into continuity mode, which will make it beep when you touch the probes together. Then you put one probe on the k-line pin in the obd connector and the other on the corresponding pin in the ecu harness, if you get a beep then the wiring is good. If not then you have to dig in and figure out where the problem is. While your there you use the DMM in voltage testing mode to make sure the ecu is getting +12volts constant +12volts switches and ground. Im sure there are hundreds of youtube videos about using a dmm.
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Old Mar 17, 2019, 07:57 PM
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Also, check the #8 20A fuse in your engine bay listed as "Engine Control" in your manual. If that fuse is blown the engine wont run or connect to ecuflash.
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Old Mar 17, 2019, 09:44 PM
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Since nobody has mentioned it, do you have the little mitsubishi adapter plug connected properly?
You need it to be able to flash the ECU.
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Old Mar 18, 2019, 04:51 AM
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Yep checked #8 fuse and changed it just for good measure and yes the apapter is connected when I try to flash it. It is as if the ECU just took a crap!!

is this common? If I get a used ecu am I able to flash it to the car?
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Old Mar 18, 2019, 01:57 PM
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Are you able to connect to evoscan?

Also, I've notice that if I have another USB device plugged into my laptop while trying to connect to ecuflash it doesn't work. I need to unplug all USB connections except the 1.3U cable inorder to read/write to the ecu.
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Old Mar 18, 2019, 02:37 PM
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I had the same issue you are describing and it ended up being my 1.3u cable. See if you can trade with a friend and verify that is not the case. It is rare for the ECU itself to fail.
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