Circuit/System Verification

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Verify the coolant is at the correct level.
- If the coolant level is incorrect
  Refer to: Loss of Coolant
- If the coolant level is correct
Verify DTC P00B3, P00B4, P00B7, P0102, P0103, P0111, P0112, P0113, P0114, P0117, P0118, P0119, P0597, P0598, P0599 is not set.
- If any of the DTCs are set
  Refer to: Diagnostic Trouble Code (DTC) List - Vehicle
- If none of the DTCs are set
Perform the following steps:
- Engine running. - For greater than 15 min
- A/C Compressor = Off
- Increase the engine speed slowly to 3000 RPM.
Perform the scan tool control function: Engine Coolant Thermostat Heater - 0%
Verify the scan tool parameter: ECT Sensor = Greater than +79°C (+174°F)
- If colder than +79°C (+174°F)
  Replace the component: E41 Engine Coolant Thermostat Heater
- If warmer than +79°C (+174°F)
Perform the following steps:
- Perform the scan tool control function: Engine Coolant Thermostat Heater - 100%
- Increase the engine speed slowly to 3000 RPM.
Verify the following parameters are within +20°C (+68°F) of each other:
- ECT Sensor
- Radiator Coolant Temperature Sensor
- If not in the specified range
  Refer to: Circuit/System Testing
- If in the specified range
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.