So my truck won't start and won't crank. It ran fine when I last parked it. Now the tach doesn't move when i jump the starter relay, it doesn't display a wait to start message and i can't connect to the ECM with my scan tool. And no 5v ref at the MAF or EGR temp sensor. So maybe its a bad ECM
I do have 12v on pin 3 and 5 on the ECM, and a good ground on pin 2 and 4. My diagram says there should also be a ground on pin 6, but my voltage gauge shows that is open. Anyone have any idea where the pin 6 ground goes?
Any other suggestions on diagnosing a bad ECM before I roll the dice buying one at the dealer. TIA
I do have 12v on pin 3 and 5 on the ECM, and a good ground on pin 2 and 4. My diagram says there should also be a ground on pin 6, but my voltage gauge shows that is open. Anyone have any idea where the pin 6 ground goes?
Any other suggestions on diagnosing a bad ECM before I roll the dice buying one at the dealer. TIA