what does it mean if my Toyota Corolla E210 (2019-2024) has a C1231 code?

Learn how to diagnose and fix C1231 ABS malfunction in Toyota Corolla E210 (2019-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Ensure the vehicle is on a level surface and securely lifted with jack stands.

2. Inspect and Replace Wheel Speed Sensors

1. Locate Wheel Speed Sensors:

   • Identify the location of each wheel speed sensor (typically mounted on the wheel hub).

2. Remove the Wheel:

   • Use a socket set to remove the lug nuts and take off the wheel.

3. Disconnect the Sensor:

   • Locate the connector for the wheel speed sensor and carefully disconnect it.

4. Remove the Sensor:

   • Unbolt the sensor from the hub using the appropriate socket size. Take note of any mounting orientation.

5. Install the New Sensor:

   • Position the new wheel speed sensor in place and secure it with bolts to the hub.
   • Reconnect the electrical connector ensuring a secure fit.

6. Repeat for All Sensors:

   • Follow the same steps for each wheel speed sensor if more than one is faulty.

3. Clear Codes and Test Drive

1. Reconnect the Battery:

   • Reconnect the negative battery terminal securely.

2. Use OBD-II Scanner:

   • Clear the C1231 code and any other related codes from the vehicle's computer.

3. Test Drive:

   • Conduct a test drive to ensure proper functionality of the ABS and check for any reoccurrence of the code.