Hardline
Senior Member
Good morning gentlemen, got one that I think I know what is wrong but wanting to make sure before we order in a $1000 ECM. Customer has a T-190 that intermittently will throw a 64-03 code. We have traced it down and it is not getting its signal to the switch power / acc relay. The power to this relay is sent out on pin 42 of the J-1 plug of the ECM. After checking for power at the pin out we have none when the machine beeps and throws the code. I'm thinking the ECM is going bad. But just wanting to make sure there is nothing else telling the ECM to turn off power to pin 42. When the machine throws the code there are NO other codes. Just the 64-03. Thanks in advance. JJ