I have searched and looked with no luck answering my question. I am trying to figure out what it takes to make the ECU happy. In other words, what signals are required to make the ECU send the "happy" signal that tells the electronic fuel pump to pump and the the distributor to distribute.
Checked all the grounds, all the connections, and the codes says the ECU is having a problem establishing a ground. The ECU is well bolted to the truck. With the key in ON position; CEL, A/T, CHARGE lamps are on.
I really am trying to understand all the triggers that are required to make the ECU - Happy.
I know the neutral park switch has to be working, the plug has to be in the air intake, ECU bolted to the truck, ....
The techs at the dealership talked with the engineers and don't seem to get it.
Oh, and I read Diagnostic Procedure for EFI Related Woe and Strife.
All fuses check with meter. All good.
Checked all the grounds, all the connections, and the codes says the ECU is having a problem establishing a ground. The ECU is well bolted to the truck. With the key in ON position; CEL, A/T, CHARGE lamps are on.
I really am trying to understand all the triggers that are required to make the ECU - Happy.
I know the neutral park switch has to be working, the plug has to be in the air intake, ECU bolted to the truck, ....
The techs at the dealership talked with the engineers and don't seem to get it.
Oh, and I read Diagnostic Procedure for EFI Related Woe and Strife.
All fuses check with meter. All good.