Monitor Strategy Description

WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.

ECT stuck signal:

The purpose of the signal stuck diagnosis is to detect a stuck measured coolant temperature sensor signal. The diagnosis function checks if after a variation of the calculated coolant temperature substitute value (ECT_SUB) also a variation of the measured coolant value is detected.

The diagnosis is performed only once per engine run.

ECT stuck high:

The diagnosis is based on monitoring the alteration of the coolant temperature signal (ECT) (positive and negative change) to determine a malfunctioning sensor stuck signal at high coolant temperature values. Even at high coolant temperature values at engine start, a smooth change of the coolant temperature signal can be observed. Either at special engine operating conditions after a specific time interval or due to temperature changes caused by the coolant thermostat.

ECT sensor stuck in range:

The purpose of the signal stuck in range diagnosis is to detect a measured coolant temperature signal, which is stuck in range above the lowest maximum enable temperature.