why is the ABS light on in my Tesla Model 3 Highland (2024-present) and traction control disabled

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the ignition is turned off.
• Disconnect the negative terminal of the 12V battery to prevent electrical shorts.

2. Inspect ABS Wheel Speed Sensors

• Tools Required: Socket set, multimeter
• Remove the wheel cover (if applicable) and wheel to access the wheel speed sensor.
• Disconnect the sensor connector and inspect the wiring for damage.
• Use a multimeter to check the resistance of the sensor; it should typically be around 1,000 ohms.
• Clean any debris from the sensor area and reconnect.

3. Check Brake Fluid Level

• Open the hood and locate the master cylinder reservoir.
• Inspect the brake fluid level; it should be between the minimum and maximum marks.
• If low, top off with the manufacturer-recommended brake fluid.
• If the fluid is contaminated, flush the brake system and replace the fluid.

4. Inspect ABS Control Module

• Tools Required: Torx screwdriver set
• Locate the ABS control module, typically near the brake booster.
• Check for any visible signs of damage or corrosion on the connectors.
• If necessary, disconnect the module and clean the contacts with electrical contact cleaner.
• Reconnect the module securely.

5. Test Brake Pedal Switch

• Tools Required: Multimeter
• Locate the brake pedal switch, usually mounted near the brake pedal.
• Disconnect the switch and test for continuity while pressing the brake pedal.
• Replace the switch if it does not function properly.