what does it mean if my Toyota Highlander shows a C1201 code?

Solution

1. Preparation

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

2. Check and Replace Fuses

• Locate the fuse box and identify the ABS and VSC fuses.
• Use a multimeter to test continuity of the fuses. If a fuse is blown, replace it with one of the same amperage.
• Reconnect the negative battery terminal after replacing fuses.

3. Inspect and Clean ABS Wheel Speed Sensors

• Locate the ABS wheel speed sensors at each wheel hub.
• Remove the sensors from their mounting brackets using a socket set.
• Clean the sensor tips using brake cleaner and a soft cloth to remove debris.
• Reinstall the sensors and ensure they are securely mounted.

4. Check Wiring and Connectors

• Inspect the wiring harness connected to the ABS system for fraying, cuts, or corrosion.
• Use a multimeter to test continuity of the wires.
• Repair or replace damaged wiring and connectors as needed.

5. Reset the ABS System

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the C1201 code.
• Start the vehicle and allow it to idle for a few minutes.