what does the C1201 code mean for my Toyota Highlander Fourth Generation (2020-present) stability co...

Solution

1. Preparation

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

2. Inspect Wheel Speed Sensors

• Locate the wheel speed sensors on each wheel hub.
• Remove the sensor connectors carefully to avoid damaging the pins.
• Clean the sensor area and check for debris that might affect readings.

3. Test Wheel Speed Sensors

• Using a multimeter, set it to measure resistance.
• Disconnect the wheel speed sensor and check resistance across the terminals.
• Compare the readings to manufacturer specifications (typically between 1,000 to 2,500 ohms).
• Replace any sensors that are out of specification.

4. Inspect Wiring and Connectors

• Visually inspect the wiring harness for frays or cuts along the length.
• Check connectors for corrosion or loose connections.
• Repair or replace any damaged wiring or connectors.

5. Check ABS Module and Pump

• Locate the ABS module and pump assembly.
• Inspect for any visible leaks or damage.
• If necessary, perform a continuity test on the ABS wiring and check for faults in the module using the OBD-II scanner.

6. Reconnect and Clear Codes

• Reconnect all sensors and the battery.
• Use the OBD-II scanner to clear the C1201 code.
• Perform a test drive to ensure the VSC system operates correctly.