I have a 2008 TE510 and I need some help on getting a pcm. This is whats going on. I have switched power to the relay for the fuel pump. This comes from the power unit interface. The ground side of the coil in the relay is grounded by the pcm. This is what pulls the switch and makes power flow to the fuel pump. Make a long story short the pcm is not suppling a ground for the relay to switch. If I supply a ground, relay switches and fuel pump powers up. The main ground for the pcm is good. PCM has failed. That was a hard one to figure out when your stuck in the middle of the woods. FYI, do not go off the color of wires that are in the book. WAY OFF. My question is if their is an upgrade pcm to buy? Can I use a 2009 pcm that has the dual map switch? Can anyone recomend where to buy one? Their are no dealers in Colorado. Thanks for the help and info in advance.