what does code C1201 mean for my Toyota Corolla E140 (2006-2013) and how to fix it?

Solution

1. Preparation

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

2. Inspect and Replace ABS Fuse

• Locate the fuse box (refer to the owner’s manual).
• Remove the cover and locate the ABS fuse.
• Use a multimeter to check for continuity or visually inspect the fuse.
• If the fuse is blown, replace it with the specified amperage fuse.

3. Check and Repair Wiring

• Visually inspect the wiring harness connected to the ABS module and wheel speed sensors.
• Look for any signs of fraying, cuts, or corrosion.
• Repair any damaged wires by splicing in new wire or replacing the harness as necessary.

4. Inspect Wheel Speed Sensors

• Remove the wheel and tire for access to the wheel speed sensors.
• Disconnect the sensor connector and check the resistance with a multimeter; it should typically be between 1,000 to 2,000 ohms.
• Clean the sensor and the mounting area; replace the sensor if it is faulty or damaged.
• Reassemble the wheel and tire.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the stored fault codes.
• Start the vehicle and check if the ABS warning lights are still illuminated.