how to fix the C1231 error code on my Toyota RAV4 Fourth Generation (2013-2018)?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, jack and jack stands, wheel chocks.
• Safety Warnings: Disconnect the battery to prevent any electrical shorts before working on the ABS system.

2. Inspect and Replace Wheel Speed Sensor

1. Lift the vehicle:

   • Use a jack to lift the vehicle and secure it with jack stands.
   • Place wheel chocks behind the rear wheels for safety.

2. Remove the wheel:

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

3. Disconnect the wheel speed sensor:

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

4. Remove the wheel speed sensor:

   • Locate the sensor mounted on the wheel hub assembly.
   • Remove the mounting bolts using the socket set and take out the sensor.

5. Install the new wheel speed sensor:

   • Position the new sensor in the same location and secure it with the mounting bolts.
   • Torque the bolts to the manufacturer’s specifications.

6. Reconnect the sensor:

   • Plug in the new wheel speed sensor connector securely.

3. Reassemble and Test

1. Reattach the wheel:

   • Place the wheel back on the hub and hand-tighten the lug nuts.
   • Lower the vehicle and torque the lug nuts to the manufacturer’s specifications.

2. Reconnect the battery:

   • Reconnect the battery terminal securely.

3. Clear error codes:

   • Use the OBD-II scanner to clear the C1231 error code from the vehicle’s memory.

4. Test drive:

   • Take the vehicle for a test drive to ensure the ABS and traction control systems function properly.