what does the C1231 code indicate for my Toyota RAV4

Solution

1. Preparation

• Gather all necessary tools and components.
• Ensure the vehicle is on a level surface and securely lifted with jack stands.
• Disconnect the vehicle’s battery to prevent any electrical shorts.

2. Inspect and Repair Wiring

• Sub-step 1: Remove the wheel covering the rear left ABS speed sensor.
• Sub-step 2: Inspect the wiring harness and connectors for damage or corrosion.
• Sub-step 3: Clean or repair any corroded connectors; replace damaged wiring as necessary.
• Tools Required: Wire cutter, electrical tape, soldering iron (if needed)

3. Replace ABS Speed Sensor

• Sub-step 1: Locate the ABS speed sensor on the rear left wheel hub.
• Sub-step 2: Remove the sensor mounting bolt using a socket set.
• Sub-step 3: Carefully pull out the old speed sensor from the hub assembly.
• Sub-step 4: Install the new ABS speed sensor into the hub, ensuring it fits securely.
• Sub-step 5: Reinstall the mounting bolt and torque it to the manufacturer's specifications.
• Tools Required: Socket set, torque wrench

4. Reconnect Battery and Test

• Sub-step 1: Reconnect the vehicle's battery.
• Sub-step 2: Start the engine and check for the ABS warning light.
• Sub-step 3: Perform a test drive to ensure the ABS functions properly.