what does C1201 code mean for my Toyota Camry XV40 (2007-2011)

Solution

1. Preparation

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

2. Inspect Wheel Speed Sensors

• Locate each wheel speed sensor (typically mounted near the wheel hub).
• Remove the sensor by unbolting and disconnecting the wiring harness.
• Use a multimeter to check the sensor's resistance; it should be within manufacturer specifications (typically between 1,000 - 2,500 ohms).
  • If the sensor is faulty, replace it with a new one.
• Reinstall the sensor and reconnect the wiring harness.

3. Check ABS Control Module

• Locate the ABS control module, typically found near the brake booster.
• Inspect the connections and wiring for corrosion or looseness.
• If necessary, use a multimeter to test for continuity and ensure it is properly grounded.
• If the module is faulty, replace it with a new or refurbished unit.

4. Clear the Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the C1201 code and any other related codes from the system.
• Perform a test drive to ensure the ABS system functions correctly.