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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Antilock Brake System) >> Diagnostic Information and Procedures >> DTC C0274: Isolation Valve High Temperature >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
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.
    • 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 is 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.

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