The detection circuit of Daewoo ESPERO No.23 and 25 fault codes

Published:2011/5/17 4:37:00 Author:Borg | Keyword: detection circuit, fault codes | From:SeekIC

Fault code of 23 means the signal voltage of air temperature sensor is too high,(MAT) and the 25 means it is too low.Admission manifold air temperature sensor controls the signal voltage to ECM with a thermistor(see as Figure 18). ECM imposes a reference voltage(4~6V) on a sensor in No.427 circuit, when the air temperature is low, the resistance of the sensor (thermistor) is high, so ECM will get a high signal voltage. As the air gets warmer, the resistance of the sensor is getting lower, and the voltage is getting lower.



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