why does my Tesla Outback’s brake warning light stay on?

Solution

1. Preparation

• Gather tools: OBD-II scanner, brake fluid, socket set, torque wrench, and a multimeter.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Check Brake Fluid Level

• Open the hood and locate the brake fluid reservoir.
• Remove the cap and visually inspect the fluid level; it should be within the marked range.
• If low, top off with manufacturer-recommended brake fluid (usually DOT 3 or DOT 4).

3. Inspect Brake Components

• Remove the wheel to gain access to the brake assembly.
• Check the brake pads for thickness; replace if worn down to less than 3mm.
• Inspect the rotors for signs of scoring or warping; resurface or replace as necessary.
• Ensure calipers are functioning properly and not leaking brake fluid.

4. Test Brake Pedal Switch

• Locate the brake pedal switch, typically mounted on the brake pedal assembly.
• Use a multimeter to check for continuity when the brake pedal is depressed.
• If the switch is faulty, remove it and replace it with a new one.

5. Address ABS Module Issues

• If error codes indicate ABS faults, further diagnostic may be required.
• Inspect wiring and connectors to the ABS module for damage.
• If necessary, replace the ABS module following manufacturer specifications.