why does my Toyota Highlander Fourth Generation (2020-present) traction control keep turning off

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery before beginning any electrical work to ensure safety.

2. Inspect Wheel Speed Sensors

• Tools Required: Multimeter, socket set
• Remove the wheel covers or wheels as necessary for access.
• Unplug the wheel speed sensor connectors and check for continuity using a multimeter.
• Clean any dirt or debris from the sensor and mounting area.
• Reinstall the sensors and connectors securely.

3. Check Brake System

• Tools Required: Brake fluid tester, torque wrench
• Inspect the brake fluid reservoir for proper fluid levels; refill with manufacturer-recommended brake fluid if low.
• Check the ABS module for any signs of leaks or damage.
• If necessary, replace any faulty brake components and ensure all connections are tight.

4. Examine Wiring and Connectors

• Tools Required: Wire stripper/crimper, electrical contact cleaner
• Visually inspect wiring harnesses for fraying or breaks, especially near wheel wells and suspension components.
• Clean electrical contacts with contact cleaner; resecure any loose connections.

5. Battery and Charging System Check

• Tools Required: Multimeter
• Measure the battery voltage; it should be around 12.6 volts when fully charged.
• Start the vehicle and check the voltage with the engine running; it should read between 13.7 to 14.7 volts to ensure proper charging.

6. Update Vehicle Software

• Tools Required: OBD-II scanner with software update capability
• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Follow the manufacturer's instructions to check for and install any available software updates.