S300 power to led lights

[1320vickers]

I have a s300 in a crx and I’ve looked to see if the d3 light stays on after the key has been switched on. It seems like it’s supposed to but mine goes off after a second I’m just trying to figure out if it’s normal or a socket issue

[Spunkster]

Ignoring the lights, is it working as it should?

[1320vickers]

It will start if you force it spits and sputters

[1320vickers]

I haven’t been able to connect to the laptop either No upload or data log

[Spunkster]

What is the serial number that is on the s300 board inside the ECU?

Who installed this s300 and did the socketing of the ECU?

[1320vickers]

38715 I bought it used I’m not sure who did the socket it worked fine for awhile ever now and again I would have trouble getting it to connect

[Spunkster]

Post pictures of the bottom of the ECU showing the soldering where the s300 was installed.

[1320vickers]

Could the wiring harness have anything to do with it

[Spunkster]

It could be any number of things. I can't really see the solder joints as it is out of focus. Have the capacitors been replaced?

[1320vickers]

I’m sorry I tried to get it to focus better not that I know if I thought about ordering a kit and putting all new ones in the board has a tiny brown spot next to c14

[1320vickers]

These look better

[Spunkster]

I would start by replacing the capacitors and see if that resolves the issue, as they are more than 25 years old.

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

[1320vickers]

Done deal thank you

[1320vickers]

Ok had the ecu completely refurbished with all new capacitors and socket kit and it’s still not connecting to the laptop On the dash it says ignition off I’m thinking a wire problem but I’ve tore it apart and don’t seen anything obvious

[Spunkster]

Is J12 cut in the ECU?