Circuit/System Verification

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify that DTC P00B3, P00B4, P00B6, P0116, P0117, P0118, or P0119 is not set.
- If DTC P00B3, P00B4, P00B6, P0116, P0117 P0118, or P0119 is set.
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle for further diagnosis.
- If DTC P00B3, P00B4, P00B6, P0116, P0117 P0118, or P0119 is not set.
Verify the coolant in the radiator surge tank is at the correct level and there are no engine coolant leaks.
- If the coolant in the radiator surge tank is not at the correct level or there are engine coolant leaks
  Refer to Cooling System Draining and Filling , and Loss of Coolant .
- If the coolant in the radiator surge tank is at the correct level and there are no engine coolant leaks
Verify the engine cooling fan operates. Using the scan tool, select Control Functions, Cooling Fan, Cooling Fan Relays 1, 2, and 3. Command the Cooling Fan ON and OFF.
- If the cooling fan does not turn ON and OFF
  Refer to Cooling Fan Inoperative (LUV) .
- If the cooling fan turns ON and OFF
Engine idling for 15 minutes with the A/C OFF.

NOTE:

Depending on ambient temperature, it may take up to 4 minutes for the temperature to decrease less than the specified value.

Command the Engine Coolant Thermostat Heater to 100 % with a scan tool. Increase the engine speed to 3,000 RPM. Observe the scan tool ECT sensor parameter. The temperature should decrease to less than 107°C (225°F).
- If ECT is warmer than 107°C (225°F)
  Refer to Circuit/System Testing.
- If ECT is colder than 107°C (225°F)
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
  Refer to Circuit/System Testing.
- If the DTC does not set
All OK.