I never got an IMA light, it was always CEL blink code 69, then the car would run really rough to the point where i couldn't tell if LB was working. I believe the relevant thread might be this even though i never got the subcode:
Need P1644 Help - Insight Central: Honda Insight Forum
The first time CEL blink code 69 came on was when it was parked overnight. I changed the 3 point ground in the battery box, and tried to troubleshoot. The ecm to mcm harness was really dirty. If it isn't the wiring, i had several uninformed thoughts if you could chime in on why it stops working after x amount of time ~30 minutes (not knowing exactly how the Enabler works):
1, Ign hold relay turning off?
2, PDU trying to charge the 12 volt and being unable to.
3, power failure of some sort.
4, it probably is the wiring
I might scrap this Enabler and resolder a really good one and beef up the wiring where it taps into the mcm connections. The CVT is really clean and should weed out any gremlins. MT passed inspection so i can get back to work on the Enabler this weekend.