Saturday, August 10, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 466


Circuit/System Description



When the heated seat function is active, the heated seat module (HSM) supplies battery voltage through the element supply voltage circuit to the seat



heater elements. The module controls the seat temperature by providing a PWM ground through the heated seat element control circuit to the seat



heater elements. The module then monitors the current flow through the heating element and the temperature sensor rate of change to verify correct



operation.



Conditions for Running the DTC



The HSM must be powered and the heated seat must be enabled.



Conditions for Setting the DTC



B1935 04 or B2180 04



The module does not detect a temperature change within 210 seconds.



B1935 0A or B2180 0A



The module detects that the set point temperature has not been reached within 8.5 minutes.



B1935 0B, B1935 0E, B2180 0B, or B2180 0E



By measuring output current, the module calculates that the heating element resistance is below the minimum resistance.



B1935 0C, B1935 0D, B2180 0C, or B2180 0D



By measuring output current, the module calculates that the heating element resistance is above the maximum resistance.



B1935 1F or B2180 1F



The temperature sensor voltage is erratic or changes suddenly.

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