Circuit/System Verification
- Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to COOLING SYSTEM LEAK TESTING and COOLING SYSTEM DRAINING AND FILLING (VAC N FILL) or COOLING SYSTEM DRAINING AND FILLING (STATIC FILL) .
- Ignition OFF for 8 hours or greater.
- Ignition ON, observe the scan tool IAT and ECT sensor parameters. The ECT, IAT, and ambient temperature should be within 15°C (27°F) of each other.
- 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.