Monitor Strategy Description
WARNING: This page is about a different car, the 2006 Suzuki Reno and 2006 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
The Thermostat Diagnostic monitors the time it takes for the coolant temperature to reach either the maximum temperature required to enable other diagnostics or the manufacturer recommended Thermostat Regulating Temperature -11 °C, and compares it against a threshold in order to make a PASS/FAIL determination, provided airflow and idle conditions are met.