Vehicle speed cannot be set when the SET switch is pressed (between 40 km/h (25 mph) and 145 km/h (90 mph))

Diagnostic procedure

1. Test the adaptive cruise control (ACC)/LKAS combination switch.
2. Test the transmission range switch.
3. Test the brake pedal position switch.
4. Check for a short in the SCS line.

Also check for

- Blown No. 4 (15 A) or No. 13 (20 A) fuse in the under-hood fuse/relay box
- An open in the wire
- A short in the wire
- The system is in service mode