what does it mean if my Toyota Highlander XU70 (2020-Present) shows C1201 code

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and cleaning supplies.
• Ensure the vehicle is parked on a level surface and the ignition is off.

2. Inspect and Clean Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel.
• Remove the wheel using a socket set to access the sensors.
• Clean the sensor area gently with a soft cloth to remove any debris.
• Reconnect the sensor and ensure the wiring is secure.

3. Test Wheel Speed Sensors

• Disconnect the sensor connector from the wheel speed sensor.
• Set the multimeter to the appropriate setting (AC voltage).
• Spin the wheel by hand and check for voltage output; it should show a specific range (usually 0.5 to 1.5 volts).
• Replace the sensor if the output is outside the expected range.

4. Inspect Wiring and Connectors

• Examine all wiring for damage or corrosion, especially near the connectors.
• Repair or replace any damaged wires or connectors found during inspection.

5. Check ABS Control Module

• Locate the ABS control module under the hood or cabin.
• Inspect for visible damage or corrosion on the module.
• Use the OBD-II scanner to reset the codes after repairs.