I purchased a Hondata S300 & P28 ECU from an authorized vendor and could not connect to it with my laptop. I then decided to purchase the socket tester and when I installed it (in the same orientation as shown on the Hondata website) none of the LEDs would light up with the ignition key in the on position. I have a 2000 Civic Si and I am using the OB2b adapter harness if that helps. Any suggestions?
I?m not sure if the ECU was good, the Hondata S300 was already installed in the P28 when I purchased this system. Yes, the vehicle would start when the stock ECU was installed.
Judging by the fact that the adapter harness has been cut and spliced together, I would suspect a problem with the adapter harness or there has been some change in the vehicle harness. It sounds like your ecu is not getting any power.
I ordered the harness from horsepowerfreaks.com and the harness came from Hondata directly. I have not altered the vehicle harness in anyway except put GM Weatherpack connectors in place of the OEM injector connectors so I can use the FJO injector driver. I'm hoping to find someone locally that I can test my Hondata system in their vehicle.
I dug a little deeper into this problem and discovered that none of the connector pins going into my ECU are reading 12 Volts; the pins were tested at the actual harness and not the adapter harness. I looked for ECU fuses but could not find any?any clues as to what might cause this?
As far as electrical modifications I clipped the fuel injector connectors and installed GM Weather Pack connectors in their place to run an FJO injector driver. I have not installed the injector driver yet so there is no connection on the injector connectors. The SRS unit has been removed but I have driven the vehicle before without that. Would leaving the injectors unplugged be the problem?