I have copies of 2004 Ford Expeditin Service Books, one of which is on DTCs and one DTC # P0620 - Generator Control Circuit Failure, describes the situation thusly:
"The PCM reads the I-Line (or the ALF) and sends a DTC through the network when the I-Line (or ALF) indicates a fault." The next column lists Possible Causes:
Among which are various possible problems with the ILC circuit and the ALF circuit. What are those?
The last column has Diagnostic Aides, one of which says: "Verify battery voltage is 14.5V". What's going on there?
I can't find any info on ALF and ILC, not even in the official Acronyms and Definitions section, and I am confused about battery voltage being so high.
And so, experts, please enlighten me!
"The PCM reads the I-Line (or the ALF) and sends a DTC through the network when the I-Line (or ALF) indicates a fault." The next column lists Possible Causes:
Among which are various possible problems with the ILC circuit and the ALF circuit. What are those?
The last column has Diagnostic Aides, one of which says: "Verify battery voltage is 14.5V". What's going on there?
I can't find any info on ALF and ILC, not even in the official Acronyms and Definitions section, and I am confused about battery voltage being so high.
And so, experts, please enlighten me!
