You can use Torque Log Analyzer to check your HV Battery health.
This procedure has been used to diagnose batteries with error P0A80 or “Check Hybrid System”, by identifying the faulty block.
- Android phone (a low-end model is fine, even without any SIM, a wi-fi connection is enough)
- Torque Pro from Google Play (the free version can't be used for this test) https://play.google.com/store/apps/details?id=org.prowl.torque
- Bluetooth OBD Adapter: http://torqueloganalyzer.blogspot.it/2015/02/obd-adapters-database.html
- Custom PID list
Yaris, Auris, Prius 3:
Just download the .csv file
Follow this steps:
- Install Torque on the phone
- Load the custom PID list by following this tutorial: http://torqueloganalyzer.blogspot.it/2014/01/loading-custom-pids-on-torque.html
- Configure logging as shown here: http://pleasedonttouchthescreen.blogspot.it/2013/06/torque-logging-tutorial.html
You may only log PIDs specified here: http://torqueloganalyzer.blogspot.it/2014/12/hv-battery-fitness.html
- In order to collect significant data, we need to cause a battery discharge. We'll use the same method used by Toyota while performing the Hybrid Check:
- Push the brake pedal with your left foot
- Switch to gear R
- While keeping the brake pedal pressed, push the accelerator pedal to engage the electric motor. The car won't move anyway, because of the brake pedal.
- If the petrol engine kicks in, decrease pressure on the accelerator, to turn it off.
- Keep going until battery level gauge is at 2 bars and the petrol engine starts to recharge it.
- Collect log using the above steps.
- Load log into Torque Log Analyzer, as exaplained here: http://torqueloganalyzer.blogspot.it/2014/08/tutorial.html
- Select HV Battery Fitness in the Analytics section and run.
A fine battery will show uniform block behavior, as seen here:
While a faulty battery will have its blocks scattered: