how to troubleshoot C1231 code in Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Wheel Speed Sensor

1. Remove the Wheel:

   • Using a jack, lift the vehicle and securely place it on jack stands.
   • Remove the lug nuts with a socket set and take off the wheel.

2. Remove the Wheel Speed Sensor:

   • Locate the wheel speed sensor mounted on the wheel hub assembly.
   • Disconnect the electrical connector from the sensor.
   • Remove the bolt securing the wheel speed sensor and gently pull it from its mounting hole.

3. Install New Wheel Speed Sensor:

   • Insert the new wheel speed sensor into the mounting hole.
   • Secure it with the bolt and reconnect the electrical connector.
   • Replace the wheel and lug nuts, tightening them to the manufacturer's torque specification.

3. Reconnect Battery and Test

1. Reconnect the Battery:

   • Reconnect the negative battery terminal and ensure it is secured.

2. Clear Fault Codes:

   • Use the OBD-II scanner to clear the C1231 code and any other associated codes.

3. Test Drive:

   • Conduct a test drive to ensure that the ABS and traction control systems are functioning properly and that the warning lights do not reappear.