I'm trying to troubleshoot a parasitic battery drain and need help. With all courtesy lights off, key out, doors shut, I show 1.5A of draw. The battery is dead within 24 hrs.

I have pulled all fuses by the doors with very little difference.

Inside the fuse box under the hood, if I pull PCM ACC fuse, the draw goes from 1.5A to 0.6A. When I disconnect the IAC, the draw goes from 1.5A to 1.0A.

Not sure where to go from here. Any ideas?

  • "if I pull PCM ACC fuse, the draw goes from 1.5A to 0.6A" there is your problem, it will need professional diagnosis, either a bad PCM or other device keeping the PCM in an active state.
    – Moab
    Feb 17, 2020 at 11:59
  • Any way to diagnose it myself? Is there a way to determine why the PCM is still active with a diag tool?
    – asp316
    Feb 17, 2020 at 16:52
  • Too expensive for the DIY.
    – Moab
    Feb 17, 2020 at 16:55
  • Decided to purchase a PriorityStart to automatically disconnect the battery. Rather than spending lots of money on a school car, decided to take the band aid approach. After a few days, seems to have resolved the issue..
    – asp316
    Feb 25, 2020 at 18:18


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