what does C1231 code mean for my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather necessary tools and components.
• Ensure the vehicle is parked on a flat surface, and the engine is off.
• Disconnect the vehicle's battery to prevent any electrical issues.

2. Inspect Wheel Speed Sensors

• Sub-steps:
  1. Remove the wheel of the affected axle to access the wheel speed sensor.
  2. Carefully disconnect the sensor's electrical connector.
  3. Clean any dirt or debris around the sensor and the mounting area.
  4. Reconnect the sensor and ensure it is securely mounted.

3. Check Wiring and Connectors

• Sub-steps:
  1. Inspect the wiring harness leading to the wheel speed sensor for any visible damage.
  2. Use a multimeter to check for continuity in the wiring; repair or replace any damaged wires.
  3. Ensure all connectors are tight and free from corrosion.

4. Replace Wheel Speed Sensor (if necessary)

• Sub-steps:
  1. If resistance measurements are out of specification, remove the faulty wheel speed sensor.
  2. Install the new wheel speed sensor in the same position, ensuring proper orientation.
  3. Torque the sensor according to manufacturer specifications (typically around 7-10 ft-lbs).
  4. Reconnect the electrical connector.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the vehicle's battery.
  2. Use the OBD-II scanner to clear the C1231 code from the system.
  3. Perform a test drive to ensure the ABS system is functioning properly.