Laptop Cant Read from Hondata

[Skaterforeva1]

Hello! I purchased a P28 ecu with a Hondata V3 online. I am using an eBay jumper harness to hook into my 1998 Honda Civic EX. It has a B20b swap. When I hook my laptop in, I am not getting any signal from the ignition or motor. It says online but I do not have a lighting bolt to upload/download tunes even when the key is on. I can crank the car over a couple times and get a check engine light for the O2 sensor I left out. Could it be an issue with my laptop to the Hondata? Or could it be something with my eBay jumper harness? Im stumped. I checked all my grounds and replaced one. Any info would be greatly appreciated.

[Spunkster]

Post a picture of the adapter harness showing where it is plugged in on both ends.

[Skaterforeva1]

Im not sure how to make the pictures show up here.

[Spunkster]

Post pictures of the soldering on the bottom of the ECU that was done for the s300.

[Skaterforeva1]

123

[Spunkster]

Is J12 cut on the ECU?

Have you replaced the capacitors on the ECU?
https://hondata.com/accessories/capacit ... uage=en-gb

[Skaterforeva1]

Yes J12 is cut. When I first got the ECU I sent it to Burton racing where they confirmed the ecu was working. They also said a capacitor was leaking so they put new ones in.

[Spunkster]

Was it tested with the s300 in it by them after replacing the caps?

[Skaterforeva1]

Problem is solved. I used a cheap ebay jumper harness. Once I ordered a jumper from speed factory racing. I could upload/download tunes and everything worked properly.

Moral is I lost 3 years of progress due to a cheap ebay purchase. Don't be cheap on your builds.