how to troubleshoot C1201 code in my Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface, and the engine is turned off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Wheel Speed Sensors

• Tools Required: Multimeter, socket set, cleaning brush
• Remove each wheel to gain access to the wheel speed sensors.
• Clean any dirt or debris from the sensors and their mounting points.
• Using a multimeter, measure the resistance of each sensor (typically around 1,000 to 2,000 ohms). Replace any sensor with readings outside this range.

3. Check Wiring and Connectors

• Tools Required: Wire harness repair kit, electrical contact cleaner
• Visually inspect the wiring harness and connectors for damage or corrosion.
• Use electrical contact cleaner to clean the connectors.
• Repair or replace any damaged wiring or connectors found during inspection.

4. Test ABS Module and Pump

• Tools Required: OBD-II scanner, brake fluid
• Reconnect the battery and use an OBD-II scanner to check for any additional faults.
• If necessary, perform a brake fluid flush to ensure the fluid is clean and at the proper level.
• Start the engine and activate the ABS pump using the scanner to confirm it operates correctly without any error codes.

5. Clear Codes and Verify

• Use the OBD-II scanner to clear the C1201 code and any additional codes.
• Test drive the vehicle to ensure all warning lights are off and that the ABS and VSC systems function correctly.