why is my Volvo XC90 ABS light on and traction control disabled

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and secure it with wheel chocks.
• Disconnect the battery to avoid any electrical issues.

2. Scan and Clear Codes

• Use the OBD-II scanner to read and record any error codes.
• Clear the codes to see if the issue reoccurs after a test drive.

3. Inspect ABS Wheel Speed Sensors

• Remove the wheel to access the ABS sensor.
• Disconnect the sensor's electrical connector.
• Clean the sensor and its mounting area with a brake cleaner.
• Reconnect the sensor and wheel, then repeat for all wheels.

4. Check ABS Control Module

• Locate the ABS control module (typically under the hood or behind a panel).
• Inspect for physical damage or corrosion.
• If necessary, replace the module with a new or refurbished unit.

5. Inspect Wiring and Connectors

• Visually check all wiring and connectors associated with the ABS and traction control systems.
• Repair any damaged wires or replace faulty connectors.

6. Test Brake Fluid and System

• Check the brake fluid level and condition; top up with manufacturer-recommended fluid if low.
• Inspect for any brake fluid leaks around the master cylinder and brake lines.

7. Test Drive and Verify

• Reconnect the battery and perform a test drive.
• Monitor the dashboard for warning lights and ensure the ABS and traction control systems are functioning properly.