Monday, July 29, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 510


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 HSM controls the seat temperature by providing a pulse width modulated (PWM) ground through the heated seat element



control circuit to the seat heater elements. The HSM 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



B2425 04 or B2430 04



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



B2425 0A or B2430 0A



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



B2425 0B, B2425 0E, B2430 0B, or B2430 0E



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



B2425 0C, B2445 0D, B2430 0C, or B2430 0D



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



B2425 1F or B2430 1F



The temperature sensor voltage is erratic or changes suddenly.

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