Hymotion Plugin modification for gen 2 Prius testing

I have purchased a 2005 Prius with a Hymotion plugin added to it.
I beleive I am having issues with the regular Pius battery.
The battery fan turns on within about a minute of turning the car on.
sitting in park, the battery goes to full bars(fairly quickly), if I drive forward about 10 ft, the bars drop by 3.
Then they climb back up quickly if back in park.
If I drive any distance(1 to 2 km), the battery gets disabled and I have to limp home.
I have the red triangle and a check engine light on.
When I use the torque pro app set for prius gen 2, it says it doesn't see any errors in the mcu.
I am wondering if the hymotion setup disables my ability to read codes?
Would it be easy to temporarily disconnect the hymotion, while testing the regular battery.
I hope someone has knowdege of this system.

Thanks

 

I was able to disable the hymotion and insert the bypass plug.
Now I am able to get Torque pro check engine readings.
I reset the codes, partly hoping they would clear(but that would probably indicate a hymotion issue)
Well the fan quit running and all cleared.
I shut the car off and when I started it again I have the p0a80 error.
I will do more analysis on the stock battery and report back when I can connect the hymotion again.
I am hopefull the hymotion is in good shape, but time will tell.
Too bad I can't get the tourque pro readings with the hymotion in the loop.
Its nice to see the voltages of all the module pairs

 

pair 2 was at 13.5 ish and all the others were at 17.5 ish.
I am hopefull that I can remove the cover and just charge up the 2nd pair with a hobbie charger.
If not I guess I will need to replace them.

 

Removed the stock prius battery today.
While I was doing this, I noticed 2 items connected to the hymotion.
one is a v2green box and the other is a Raven-e box.
this attaches to an antenea on the car.
The car was previously owned by the local hydro company, I suspect these units were to monitor the amount of energy used to charge the car.
I am just wondering if it is an extra, or something that would have normally been with the hymotion?
If its an extra, I guess, I could just not reinstall it when putting the battery back in.
It had wires going through the back side moulding and had to be removed.

PS, all modules had a voltage of 8.25 +- .01 v - pretty good I think, except the ones in bank 2. they are 6.88, think I will test the 2 with a hobbie charger, but suspect they are bad.

Don't think I will even test them, when I removed them, they were swollen a bit, hard to remove.

 

I completed the rebuild and tested the stock battery.
I have connected the hymotion again and I was able to drive in EV mod as long as I stayed below 55 km/h(33mph) under moderate load. Under decelleration the motor appeared to shut off.
The battery screen flashes between the stock pack voltage and the hymotion pack.
If I turn off EV mode, the screen just shows the stock battery.
I charged the pack up and used a killawatt meter to calculate kwh on charge.
It took 1.3 kwh to charge. It appeared to take approx 9 amps while charging and dropped to .25 amps after charged.
All readings were with the killawatt meter on the 110v A/C side.
I guess I am lucky and the hymotion is still in good shape.
I will see how it responds to driving to and from work .

 

I sucessfuly removed the v2green box and the raven-e boxes.
They didn't appear to have any effect in charging, I suspect it was just for sending info to a server for stats.
I decided to test the torque pro with the hymotion connected.
It shows my battery voltages and temp still.
I am not sure if it did before, but it does now.
I will have to wait for a check engine code to see if it still doesn't show it(hope I have to wait a real long time though).
I suspect the v2green box was loading down some signals and with it gone I have visability again.

 

I will check the internet to find a hymotion manual. I notice it gives different beep codes while driving.
around 55 km it beeps 3 times and shortly there after the engine starts to help with power.
I suspect it is beeping, so I can reduce my acceleration to stay in EV mode.
If anyone has a link to a manual, I would appreciate it