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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Diagnostic Information and Procedures >> DTC P00B6: Radiator Coolant Temperature (RCT) - Engine Coolant Temperature (ECT) (LUJ, LUW) >> Circuit/System Verification

Circuit/System Verification

  1. Engine running, observe the DTC information with a scan tool. DTC P00B3, P00B4, P0117, P0118, P0597, P0598 or P0599 should not be set.
  2. Verify the coolant in the radiator surge tank is at the correct level and there are no engine coolant leaks. Refer to Cooling System Draining and Filling (GE-47716 Fill) , Cooling System Draining and Filling (Static Fill)  and Loss of Coolant .
  3. Engine idling for 15 minutes with the A/C OFF.
  4. Command the engine coolant thermostat heater to 100 percent with a scan tool. Increase the engine speed to 3, 000 RPM. Observe the scan tool radiator coolant temperature sensor and ECT sensor parameters. The radiator coolant temperature sensor and the ECT sensor parameters should be within 20°C (68°F).
    NOTE: Depending on ambient temperature, it may take up to 4 minutes for the temperatures to equalize.
  5. 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.
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