Inverter Failure 2013 v no ready light many lightson

theres a lot of fuses in a prius. batteries, bonnet, drivers left leg...

 

Agreed but a simple check.

If you’re doing the “throw parts at it” routine, staying in the shallow end avoids $$$.

But there are several locations to check and confirm.

 

There are two primary power contactors in the hv battery box that engage the hv battery to the cables. They are not being commanded on probably due to the stored codes which need to be cleared. Assuming, of course, there are no shorts or opens in the wiring. Probably needs Techstream obd2 to clear. A dealer or hybrid mechanic would have techstream equipment although you can buy a user pc bas3d system on ebay.

If interested, here is a video about the battery assembly with the contactors and control logic around time 55. The orange service plug is at time 19 and the purpose later around 33. Also check out voltage sensing wires that can go open and cause codes around time 37.

 

idk, hopefully someone else does.

 

I do not think there are fuses back there except the service plug.

 

There is a fuse in the orange plug. Might be worth a second look and verification it’s locked in place afterwards .

 

Here is a drawing of the battery contactors which are controlled by the battery ecu and the network.. Battery in from bottom left.

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I might suspect the original problem was the battery if that P308A code was there initially.

 

Did the car fail while running or was t off then you started it back up?

Any history of damage, or hit anything on the highway?

Are you able to get under the car?

 

Did the replacement inverter come with a warranty?

How do you know the used unit is good?

 

If you’re confident the inverters are good, I’d start looking at the wiring between both for damage.

Something is causing voltage to not transfer and setting the code.