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.

Ignition ON.
Verify that there are no cooling system DTCs set.
- If a DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If no DTC is not set
Verify the scan tool parameters listed below display OFF.
- Cooling Fan Relay 1 Command
- Cooling Fan Relays 2 and 3 Command
- If a scan tool parameter displays ON
  Refer to Diagnostic Aids and Symptoms - Engine Cooling for further diagnosis.
- Go to next step: If both scan tool parameters display OFF
Verify that the G10 Cooling Fan Motor is not operating.
- If the G10 Cooling Fan Motor is operating
  Refer to Circuit/System Testing.
- Go to next step: If the G10 Cooling Fan Motor is OFF
All OK.