Basically I've let this Prius sit in the yard for quite a while without starting at all, maybe 3 months. There is about 1/2 tank of gas and all the lights come on but the engine won't turn over. Is it the HV battery? The 12V is in good condition. I thought as long as the 12V is in good shape the car will start? I just need to move this car to another place in my yard. Thoughts appreciated. HV battery showing no bars of life....
UPDATE: First I checked the codes with the Autel 2000 reader. Got no codes all passed. Left the car on for a little bit and now checked again....only two codes came up... 1. hybrid P0A80 2. hybrid P3000 "The P0A80 code is a generic code that indicates a problem in the hybrid battery system. More specifically, it means that the battery pack has failed to charge or maintain a charge. This can be caused by a variety of issues, such as a faulty battery pack, a malfunctioning charging system, or a problem with the control module. The P3000 code is a manufacturer-specific code that is related to the P0A80 code. It indicates that there is a problem with the hybrid battery system, but provides more detailed information about the specific issue. Unfortunately, the meaning of this code can vary depending on the make and model of your Prius." So these are Hybrid battery codes but is it IMMEDIATELY fixable to even move the car in drive 50ft?
Does the car go into "Ready"? Did you have the orange safety plug removed from the hybrid battery? What is the voltage of the 12v battery? You need the 12v battery to power up all the ECUs in the car for the car to go into Ready mode, and you need a certain amount of charge in the hybrid battery to start the engine.
Car goes into "ready" mode but then nothing else happens....usually in my other Prius the engine kicks on when you give it gas. nothing is working. I'm not sure about the 12V battery's voltage but it powers-up my other Prius so i assume its good (enough). Again, if the car powers up via the 12V the engine SHOULD start even if the HV battery is not good, right?
NO, the hybrid battery needs a certain amount of charge to be able to start the engine. Use your Autel scan tool to read the voltage of the hybrid battery.
DAMN! I assume its too low. is there anyway to charge it some degree (using a plug in charger maybe?)
You first need to use your Autel or open the battery and use a meter to measure the voltage of the hybrid battery to determine what the next step is.
When an older hybrid car sits for months the NiMH cells in the hyrbid battery pack self discharge and because the cells are older they tend to discharge at different rates so your pack is no longer balanced and has a low charge, aka: P3000. So what you're in need of is a charging and balancing of your hyrbid pack. Maxx Volts and www.hybridautomotive.com sell commercial products but they're overpriced. So instead you can something with this type of specs for a much lower price and it has many more uses: www.alibaba.com/product-detail/KUAIQU-SPPS-D3001-232-300V-1A_1601010961235.html and follow the instructions on the hybrid automotive site . You'll also want to send 12v power to the battery cooling fan because keeping the battery pack cool while charging and balancing is essential.
If you disconnect the 12v from the car, it will reset all the ecus, clearing all DTCs and putting them to default values, including telling the car the HV battery is at about 60% SOC. Usually, this is enough to get one or two start attempts, but obviously you're using a relatively depleted HV battery, so if it doesn't start, the battery is really drained now. If the battery is in very rough condition, the ecu may recognize it has a problem before the start cycle can occur and then you're just SOL until you can get a charge on it.
thank you but I've tried that. I read that unplugging the HV and then plugging it back in might temporarily fix it as well. I just need to move it to another place in my backyard but its not critical that it be moved.
For that matter, you can go plain IG-ON (two button presses, no brake), then press the brake and shift to neutral and push it. There is no need for the hybrid system to operate for shifting to neutral.
