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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 207 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C025F, C0274, C0275, or C0280: Brake Master Cylinder Inlet and Isolation Valves Calibration Not Learned/Isolation Valve Calibration Not Learned/Dump Valve High Temperature/Stability System Active Too Long High Temperature >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC C0187, C018B, C0196, C019B, or C0710 is not set.
    • If none of the DTCs are set 
  3. Ignition OFF, allow the hydraulic Brake Pressure Modulator to cool down to ambient temperature.
  4. Ignition ON.
  5. Verify that DTC C056D 00, C025F 00, C0274 4B, or C0280 is not set.
    • If any of the DTCs are set 

      Reprogram the K17 Electronic Brake Control Module.

    • If none of the DTCs are set 
  6. Verify that no DTCs set while driving the vehicle within normal braking conditions.
    • If any of the DTCs are set 

      Replace the K17 Electronic Brake Control Module with Brake Pressure Modulator.

    • If none of the DTCs are set 
  7. All OK.