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Home >> Chevrolet >> 2025 >> Traverse Z71 >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C2A20 >> Circuit/System Verification
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Verification

  1. Ignition - On/Vehicle - In Service Mode
  2. Perform the scan tool control function: Deactivate Brake Boost System
  3. Verify there are no leaks in the component/system: Brake System - Refer to: Brake Fluid Loss
  4. Apply the brake pedal. - More than 2 times.
  5. Perform the scan tool control function: Brake Hydraulics Test
    • Go to next step: If the procedure/test passes 
  6. Ignition/Vehicle - Off - For greater than 10 min
  7. Ignition/Vehicle - On - For greater than 15 s - Brake Pedal Not Applied
  8. Apply and hold the brake pedal. - Hard - For greater than 120 s
  9. Release the brake pedal.
  10. Verify DTC C2A20 is not set
    • If DTC C2A20 is set 

      Test or replace the component: A104Brake Master Cylinder

    • Go to next step: If the DTC is not set 
  11. All OK.
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