My vehicle run good, some times all lights glow and request to change hybrid battery pack, I check the battery its charge more than 7.6 volt each cell, I clean the junctions and reinstalled, aging its shows the same, I have felling the issue not in battery, kindly advise. thanks.
Next step is to test the voltage of each module under a load... A 55w halogen headlight bulb running that 7.6v down for 2 minutes will show a decrease in voltage at the exact end of between .2 and .4 volts. One of those modules in your pack is likely bad and you will find it because it will lose .5 to 1 volts after two minutes. There's lots more to it than just that, but that's the next test that needs to be done.
Thank you for your massage, I check the cells its 8 to 7.9V after two minuets test, every time when I reset the vehicle its working back properly, its happened some times when the battery is full. please advise.
Sounds like you checked the voltage for two minutes, but you didn't check how much the voltage dropped when the battery module was lighting up the light bulb. A load test is so you can watch how the battery drains down for two minutes when connected to a lightbulb. Then you record how much the voltage dropped. The bad battery module that will need to be replaced will drain down much faster than the other battery modules...
Around 150k mile, I test all cells after two minutes, I found one cell 7.49v I change it, but now every two minutes need to resets the codes and the fan going on high speed at that time
As I said before, something is wrong with how you're doing your diagnostics... Can you please respond to my post above so we can be more helpful?
Make sure to put the battery temperature sensors more at the center of the battery pack, that's where it gets the hottest so the fan will keep them at a more cold temperature. Also please make sure the fan and fan ducts are clean, no corrosion in contacts, and again check the temperature sensors and locate them more at the center of the battery.
I check each cell and use the load for 2 minutes No cell shows any drops When The engine light on still the vehicle continuous charging I change the computer and temperature sensors still I have the same problems I bought two cells, use one of them after that when it’s lighting the engine light the fan going in very high speeds Before engine lights need to be on 60 minutes no every five minutes
Make sure to use a 12v 50w or 55w incandescent or halogen bulb... You take the voltage reading at 2 minutes before you disconnect the light bub... If you're doing it correctly you will measure a drop between 0.2v and 0.5v... The bad module will drop even more than that.
