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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify that DTC P0480, P0481, P0691, P0692, P0693, or P0694 is not set.
    • Go to next step: If no DTC is not set 
  3. Verify the cooling fan turns ON and operates at low, medium and high speed, when commanding the appropriate cooling fan relays ON and OFF with a scan tool.
    • If the cooling fan does not operate at all speeds 

      Refer to Circuit/System Testing

    • Go to next step: If the cooling fan operates at all speeds 
  4. All OK.
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