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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Engine Heating And Cooling - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0494, P30EE, P30EF, U0632, or U1314 - Cooling Fan Malfunction >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
    WARNING:

    Keep hands, tools, and clothing away from the engine cooling fans to help prevent personal injury. These fans are electric and can turn ON whether or not the engine is running and physical contact may result in bodily injury. 

  1. Ignition - On / Vehicle - In Service Mode
    2. NOTE:

    This step only applies to the following component DTCs: Cooling Fan

  2. Verify DTC U0632 is not set and no other DTCs are set.
    • If DTC U0632 is set and no other DTCs are set 

      Refer to: Circuit/System Testing

    • Go to next step: If DTC U0632 is not set and other DTCs are set 
  3. Ignition/Vehicle - Off
  4. Verify a condition does not exist with the component:
    • Engine Cooling Fan Motor - Binding or Sticking/Worn/Visible Damage
    • Blade - Cracked/Foreign objects/Missing/Visible Damage
    • If a condition exists 

      Repair or replace as necessary

    • Go to next step: If no condition exists 
  5. Ignition - On / Vehicle - In Service Mode
  6. Perform the scan tool control function: Cooling Fan - Command the component to the maximum position/speed & Release Control

    Verify the component turns On and Off: Engine Cooling Fan Motor

    • If the component does not turn On and Off 

      Replace the component: G10 Cooling Fan Motor

    • Go to next step: If the component turns On and Off 
  7. Perform the scan tool control function: Cooling Fan - Command the component to the maximum position/speed

    Verify a condition does not exist with the component: Cooling Fan - Turns Off

    • Wiggle the harness and connector: G10 Cooling Fan Motor
    • Wiggle the harness and connector: K20 Engine Control Module
    • If a condition exists 

      Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)

    • Go to next step: If no condition exists 
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Repeat step 2

    • Go to next step: If the DTC is not set 
  9. All OK.
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