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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 >> Heated Seat Inoperative (Cadillac, KA1) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, observe the appropriate scan tool Seat 1 or 2 HVC Data parameters listed below while pressing and releasing the appropriate switch. The readings should change from Off to Back and Cushion or Back Only.
    • Driver Seat HVC Mode
    • Passenger Seat HVC Mode
    • If not the specified values and there are no DTCs set, replace the HVAC control module.
  2. If all scan tool parameters test normal and there are no DTCs set, replace the MSM.
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