Anyone know what the square symbols with upper-case letters inside represent in these circuit diagrams for the various ECM/PCM systems? The squares are only used in the circuit diagrams for the ECM/PCM, and no key is given anywhere in the service manual for this symbol. Thanks.

 

They are just references to indicate continuation of the wiring on a separate page. A to A, B to B, etc.

 

A ha-
Now I see the ECM/PCM inputs span several pages and that the wavy line at the top and bottom of the ECM/PCM symbol indicates that the symbol is continued. Thank you sir. You are a scholar and a gentleman. Does honda-tech.com welcome donations? If so, I’d be happy to make one for the help. I would not have figured this problem out anytime soon.