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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 470 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2425 or B2430 (HP2 w/o Memory) >> Circuit/System Description

Circuit/System Description

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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.

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