Sunday, April 21, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 469


Circuit/System Description



The heated seat temperature sensor that set this diagnostic trouble code (DTC) is located in the seat cushion just under the seat cover with the seat



heating element. The heated seat module (HSM) supplies a 5 V reference voltage through the temperature sensor signal circuit and a ground through



the low reference circuit to the sensor. The module monitors the voltage of the sensor signal circuit to determine the temperature of the seat. The



temperature sensor varies in resistance based on the temperature of the heating element causing the signal voltage to change. Once the seat reaches



the set temperature, the module will then cycle the control circuit of the heating elements ON and OFF in order to maintain the desired seat



temperature based on the feedback voltage from the sensor.



Conditions for Running the DTC



The HSM must be powered.



Conditions for Setting the DTC



B1925 02 or B2170 02



The temperature sensor voltage drops below 0.80 V for more than 1 second.



B1925 05 or B2170 05



The temperature sensor voltage is greater than 5 V for more than 1 second.



Action Taken When the DTC Sets



The heated seat function for the affected seat will be disabled.



Conditions for Clearing the DTC



* The current DTC will clear 3 seconds after the reference voltage returns to normal operating range, and the ignition is cycled OFF then back to



ACC or RUN.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.

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