Wednesday, July 10, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 235


DTC B3578 05



- Output Air Temperature Sensor 6 Circuit Short to Battery or Open



DTC B3583 02



- Output Air Temperature Sensor 7 Circuit Short to Ground



DTC B3583 05



- Output Air Temperature Sensor 7 Circuit Short to Battery or Open



Diagnostic Fault Information



Circuit/System Description



Air Temperature Sensors



The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:



* Ambient Air Temperature Sensor



* Inside Air Temperature Sensor Assembly



* Upper Left Air Temperature Sensor



* Upper Right Air Temperature Sensor



* Lower Left Air Temperature Sensor



* Lower Right Air Temperature Sensor



* Upper Auxiliary Air Temperature Sensor



* Lower Auxiliary Air Temperature Sensor



* Auxiliary Inside Air Temperature Sensor



A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance



decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40 to +101锟斤拷C



(-40 to +215锟斤拷F). The sensor signal varies between 0-5 volts. The HVAC control module converts the signal to a range between 0-255 counts. As the

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