my Tesla Outback’s cruise control won’t engage, what’s wrong?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off before starting repairs.
• Disconnect the vehicle battery to ensure safety during electrical work.

2. Inspect Brake Pedal Switch

• Locate the brake pedal switch.
• Use a multimeter to check for continuity when the brake pedal is pressed.
  • If there is no continuity, replace the brake pedal switch.
• Reconnect the battery and test the cruise control again.

3. Check Throttle Position Sensor

• Locate the throttle position sensor.
• Use a multimeter to measure the voltage output while manually operating the throttle.
  • Voltage should vary smoothly from idle to full throttle.
  • If readings are inconsistent, replace the throttle position sensor.

4. Examine Cruise Control Lever/Button

• Remove the steering column cover to access the cruise control lever or button.
• Inspect for physical damage or loose connections.
• Test the button with a multimeter for proper operation.
  • Replace if defective.

5. Verify Speed Sensors

• Locate the vehicle speed sensor, usually found on the transmission.
• Inspect wiring for damage or corrosion.
• Use a scan tool to monitor speed sensor readings while driving.
  • If readings are erratic or absent, replace the speed sensor.