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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 (Chevrolet or GMC, KA1) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, observe the appropriate scan tool Driver Door Switch or Passenger Door Switch parameters listed below while pressing and releasing the appropriate switch. The readings should change between Inactive and Active.
    • Seat Back Heat Mode Sw.
    • Seat Heat Mode Sw.
    • If not the specified values, refer to the Heated Seat Switch component test. If the heated seat switch tests normal, test or replace the appropriate door lock/window switch.
  2. If all scan tool parameters test normal and there are no DTCs set, replace the MSM/HSM.
  3. If all heated seat functions operate normal and the heated seat switch indicators do not illuminate, refer to the Heated Seat Switch Indicators component test.
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