how to fix C1201 code in Toyota Highlander XU70 (2020-Present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Check Brake Fluid

• Remove the brake fluid reservoir cap.
• Inspect fluid levels; if low, top off with manufacturer-recommended brake fluid (DOT 3 or DOT 4).
• Check for contamination; if contaminated, perform a brake fluid flush.

3. Inspect ABS Wheel Speed Sensors

• Locate the wheel speed sensors at each wheel assembly.
• Disconnect the electrical connectors and visually inspect for damage.
• Clean any debris from the sensors and connectors using electrical contact cleaner.
• Reconnect the sensors and ensure they are securely fastened.

4. Check for Faulty Components

• Use a multimeter to test the resistance of each wheel speed sensor.
• Compare readings to manufacturer specifications; replace any sensors that are out of specification.
• Inspect wiring harnesses for frays or shorts; repair or replace as necessary.

5. Clear Codes and Test

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the C1201 code and any other related codes.
• Perform a road test to ensure the ABS and VSC systems function correctly.