what does the C1231 code mean for my Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Lift the vehicle using a jack and secure it with jack stands.

2. Inspect and Replace Wheel Speed Sensors

• Tools Required: Socket set, multimeter, torque wrench.
• Sub-steps:
  1. Remove the wheel corresponding to the faulty wheel speed sensor.
  2. Locate the wheel speed sensor mounted on the brake assembly.
  3. Disconnect the sensor's electrical connector.
  4. Remove the retaining bolt securing the sensor and gently pull it from its mounting.
  5. Inspect the sensor for damage; if damaged, replace with a new sensor.
  6. Install the new sensor by reversing the removal steps, ensuring it is securely fastened.

3. Check Wiring and Connectors

• Tools Required: Multimeter, wire brush.
• Sub-steps:
  1. Inspect wiring from the wheel speed sensor to the ABS module for any signs of wear or damage.
  2. Clean any corroded connectors with a wire brush and apply dielectric grease.
  3. Use a multimeter to check continuity in the wires between the sensor and the ABS module. Repair or replace any damaged wiring as necessary.

4. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the vehicle's battery.
  2. Clear any existing fault codes using an OBD-II scanner.
  3. Test drive the vehicle to verify that the ABS system is functioning correctly and that the C1231 code does not reappear.