Cruise Control: Diagnosis: Notes

The diagnostic tool contains a menu that indicates the condition that has not been fulfilled if cruise control cannot be engaged. Another menu indicates the reason why cruise control was disengaged when it was last used.
If the input from the brake light switch is continuously B+, diagnostic trouble code P1576 will be generated. If the input from the brake light switch is continuously 0V, diagnostic trouble code P1577 will be generated.