Circuit/System Verification

WARNING: This page is about a different car, the 2013 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify that DTC P00B3, P00B4, P0480, P0481, P0597, P0598, or P0599 are not set.
- If DTC P00B3, P00B4, P0480, P0481, P0597, P0598, or P0599 are set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If DTC P00B3, P00B4, P0480, P0481, P0597, P0598, or P0599 are 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.
- If the engine cooling fan does not operate
  Refer to Cooling Fan Inoperative (LL0) .
- If the engine cooling fan operates

NOTE:

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

Engine idling for 15 min with the A/C OFF.
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 parameters. The temperature should decrease to less than 85°C (185°F).
- If the temperature does not decrease to less than 85°C (185°F)
  Refer to Circuit/System Testing below.
- If the temperature does decrease to less than 85°C (185°F)
All OK.