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.
