Hello, I just acquired a 2002 Prius for free that was left sitting for 9 month. I would like to try to get this car running in a unique way. More on that later. This is what I know of the car. It was being driven daily for a few years and it died one day. Dealership said it was the battery but they drove it away I guess. A week after it died at the house and they did an oil change on it but I was told the wrong oil was used, Have not had a chance to check yet. I got a simple code scanner from advance auto and pulled code P3030. I took apart the battery and all the terminal nuts, bolts, and battery connector plates are pretty corroded. The orange connector for the current sensors that connects to the battery ECU apparently did one of 2 things and probably both, 1. High voltage vaporized 2 of the individual terminals on the battery ecu side of the connector and some of the plastic on the wire side of the plug. 2. it caught fire momentarily after it vaporized the 2 terminal prongs I did open up the battery ECU and everything appears to fine on the inside. I have no way of knowing if it is good though. I just can't see any visible damage or scoring marks on the individual board components. Before I replace the ECU I am going to try wiring the individual current sensing leads directly to the ECU board. Now I only know simple auto repair stuff and simple house electronic repairs but did build a simple electric motorcycle once so I have a good grasp on the technology in general just not the Prius. Here is where it should hopefully get interesting. I have seen threads about people not wanting to use the battery pack but those threads never got anywhere. I need help understanding exactly what communication is going on between all these parts so I can trick the car into thinking the battery is always full and then not ever wanting to use the battery beyond starting the car. I understand the Prius engine has no torque at low speed and by itself is not a good choice to move the car. I would like to always use the power generated by the generator to drive the car and use a very small battery or capacitor pack only to provide the power to start the ICE. It is my understanding the car already has a mode where it does this just not till its over 34mph. So the task becomes to get it to always operate that way regardless of speed. As far as tricking the battery ECU, Can a "device" be made that plugs into the battery ECU that gives the readings its looking for? I was thinking of use capacitors to provide the voltage/amperage the ECU is looking for so it always says "Hi! I am fine" to the rest of the system. Can capacitors be used to a mock battery pack? If anybody can point me in the right direction for GEN 1 resources I'd appreciate it. Understanding how everything talks together would help alot. Thank you, Aaron.