Transmission Computer

Computer problem 6 cyl Four Wheel Drive Automatic 90,000 miles

I have a 1994 Isuzu Trooper DOHC with the 4L30E automatic transmission and when I jump plug the computer to get the codes I'm getting Code 37. Can anyone tell me what Code 37 means? And if possible can you give me hints as how to fix the problem?
Also, I would like to know how to locate the transmision computer. I see one under the steering wheel to the left but I know there's another one under the center dashboard. Which is which?

Thank's a lot

Richard.