After several years of having my IMA off, I finally took out the battery, tested the sticks, went through a couple of charging/discharging cycles, and re-assembled it. To my great surprise, it worked! For about six weeks. So I took it out again and tested again. I replaced the sticks that read low, including replacing the harness with the temp. sensors (since two of the four sticks with sensors read low). Maybe after my initial unexpected success I was a little casual and sloppy, but it didn't work this time. I'm going to take off the IMA cover and check to make sure that all of the plugs are connected properly, since that seems like the easiest possible solution. Any suggestions on what to look for next, after I take the battery out again?