Summary
Highlights
When starting the car, a 'default ABS' or 'default ESP' light on the dashboard indicates a faulty wheel sensor. The video shows how to test each sensor individually to identify the broken one.
The front right wheel sensor is located under the hood, between the expansion tank and the power steering fluid cap. Disconnect it and use an ohmmeter to test the two connection pins. No resistance variation indicates the sensor is working correctly.
The rear wheel sensors are found in a housing under the back seat. Lift the fabric, remove the plastic cover, and the connectors for the left and right rear wheels will be accessible. The left connector is for the rear left wheel and the right connector for the rear right wheel.
Testing the rear right wheel sensor with an ohmmeter shows almost no resistance, indicating it is defective. This confirms it is the sensor that needs to be replaced. The other rear sensor is also checked to ensure it is in good working order.
This diagnostic method has successfully identified faulty wheel sensors multiple times, preventing the need to replace all four sensors. A future video will detail how to replace a wheel sensor.
The front left wheel sensor is situated under the fuse box. Remove the battery cover to access it more easily. After disconnecting and detaching it, test the pins with an ohmmeter. If there's no variation in resistance, the sensor is functional.