Set Speed Does Not Cancel When The Cruise Control Main Button Is Pressed

Set speed does not cancel when the cruise control main button is pressed

Check for PGM-FI DTCs Initial Inspection and Diagnostic Overview.

Do the cruise control combination switch test Testing and Inspection.

Do the cruise control input test Component Tests and General Diagnostics.
Test the cruise control main switch signal input.

Also check for

Short to power on the LT GRN or YEL wire