The schematic will show the connection between the PCH (typically HM470, HM570, or similar) and the CPU (8th or 9th gen, maybe 10th). Key signals to probe:
Useful for identifying component locations visually via board images. 6-71-w24e0-d03 gp schematic
The latter half of the code defines how the valve or device behaves. The schematic will show the connection between the