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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1 (Antilock Brake System) >> Diagnostic Information And Procedures >> DTC C0274, C0275 Or C0280: Isolation Valve High Temperature/Dump Valve High Temperature/Stability System Active Too Long >> Circuit/System Verification

Circuit/System Verification

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NOTE: Since most occurrences of this DTC are caused by excessive ABS or traction control usage, review with the customer the conditions under which the DTC set.
  1. Ignition ON.
  2. Verify that DTC C0186, C0187, C0196, C0287 or C0710 is not set.
    • Go to next step: 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 C0274 54, C0275 54 or C0280 54 are not 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.

    • Go to next step: If none of the DTCs are set 
  6. All OK.
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