System Description / Monitoring Procedure

The system accumulates the intake air quantity to simulate the engine operating condition as the warm up counter.

The thermostat is considered malfunctioning if the coolant temperature does not reach 75 °C at which the thermostat is at the regulating temperature (82 °C) within 11 °C. The time interval required for monitoring is based on the accumulated intake air quantity.

1. Time interval required for monitoring: Approximately 15 minutes maximum
2. Monitoring condition: engine start ECT=-8 to 65 °C