Set Speed Does Not Resume When the Resume/Accel Button Is Pressed (Set Speed Temporarily Canceled by Pressing Brake Pedal)
Set speed does not resume when the resume/accel button is pressed (with the cruise control main switch turned on, and set speed temporarily canceled by pressing the brake pedal)
Check for PGM-FI DTCs Initial Inspection and Diagnostic Overview.
Do the cruise control combination switch test Service and Repair.
Do the cruise control input test Cruise Control (ECM/PCM) Input Test (A/T).
Test the resume/accel switch signal input.
Also check for
Open circuit, loose or disconnected terminals: LT BLU, GRY wire