Got an error code of 12 "Problem with the battery connection. Direct battery input to PCM disconnected within last 50 ignition key-on cycles" Occasionally the truck would just not fire, like it was getting no fuel, this last time I was showing no fire from the coil so I replaced that along with the cap and rotor. I checked voltage at the coil wire harness, and got 13 volts when set to a body ground, but only got 5 volts when grounded to the harness. How do I check the battery connection to the PCM, or anything else I might need to check?
Oct 25, 2009 at 12:36 PM