what does it mean if my Toyota Highlander shows a C1241 code?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Ensure the vehicle is on a flat surface and securely supported.

2. Inspect ABS Wheel Speed Sensors

• Sub-steps:
  1. Locate the ABS wheel speed sensors on each wheel hub.
  2. Remove any dirt or debris from the sensor area.
  3. Disconnect the sensor wiring harness.
  4. Inspect the sensors for physical damage and test for proper resistance using a multimeter (typically between 1,000 to 2,000 ohms).
  5. Clean the sensor mounting surface and reattach the sensor.

3. Check Brake Fluid Level

• Sub-steps:
  1. Locate the brake fluid reservoir.
  2. Remove the cap and check the fluid level against the "MIN" and "MAX" marks.
  3. If low, top off with the manufacturer's recommended brake fluid (DOT 3 or DOT 4).
  4. Replace the cap securely after checking.

4. Inspect Wiring and Connectors

• Sub-steps:
  1. Trace the wiring from the ABS sensors to the ABS control module.
  2. Look for frayed wires, corrosion, or loose connections.
  3. Repair or replace any damaged wiring or connectors.

5. Brake System Inspection

• Sub-steps:
  1. Visually inspect the brake lines for leaks or cracks.
  2. Ensure all brake components, including calipers and pads, are functioning properly.
  3. If any components are faulty, replace them as needed.