s300 v3 not reading any sensors

[Spunkster]

Post a picture showing the bottom of the ECU showing the soldering that has been done for the s300. Make sure it is high resolution and in focus.

[Slowef9]

That’s about as good as I can get it

[Spunkster]

Some of the joints look like they may not have flowed very well, and the 4 pin connector one looks like it is not soldered completely, and I cannot see the last pin of the 4 pin connector, or the 4 pin connector is in the wrong position.

[Slowef9]

Yea I noticed that after I sent the pic touched it up a bit

[Spunkster]

It looks like there may be a problem with the through hole and it may not be making contact with where it is supposed to go on the board.

[Slowef9]

ok i will attempt to check it later is there anything you would recommend

[Spunkster]

I would recommend that you replace all the capacitors in the ECU.

https://www.hondata.com/products/access ... acitor-kit

[hondamike55]

just got my new s300 prepped ecu from burton racing dropped my s300 chip in and I get the same results as my other ecu still cant read any of my sensors or datalog the chip will take a calibration and the car runs and will rev passed 4K and no engine light is on. I got one solid green light and a red flashing light just lost at this point any assistance will be greatly appreciated

[hondamike55]

image.jpg (3.64 MiB) Viewed 3502 times

[Spunkster]

Is J12 cut in this ECU?

[hondamike55]

image.jpg (2.86 MiB) Viewed 3502 times

[hondamike55]

image.jpg (1.8 MiB) Viewed 3502 times

[hondamike55]

One of my ecu’s has j1 connected and my new one has it cut don’t know which is right

[Spunkster]

If J1 is cut, the s300 will not work in it.

[hondamike55]

ok so I put jumper in j1 and bingo all my sensors are reading and im able to datalog now so now I can book some time for the dyno and tune this bad girl in thanks again for the help spunkster your the man cheers