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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 357 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P0480, P0691, or P0692: Cooling Fan Speed Output Circuit (LGX) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
    2. NOTE:

    A slight delay may occur before the cooling fan activates.

  2. Verify the G10 Cooling Fan Motor activates in each available speed when commanding the cooling fan ON with a scan tool. The cooling fan speed should increase with each command.
    • The cooling fan does not activate or increase in speed as commanded 

      Refer to Circuit/System Testing

    • The cooling fan activates and increases in speed as commanded 
  3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  4. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing

    • If the DTC does not set 
  5. All OK.
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