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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 326 (Seat Heating System And Seat Cooling System) >> Diagnostic Information and Procedures >> Heated/Cooled Seats Inoperative (Chevrolet or GMC, KB6) >> Circuit/System Verification

Circuit/System Verification

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  1. If both, the driver and passenger heated and cooled seats are inoperative, refer to Both Driver and Passenger Heated/Cooled Seats are Inoperative.
  2. Ignition ON, observe the scan tool Driver Door Switch parameters listed below while pressing and releasing the appropriate switch. The readings should change between Inactive and Active or Off and ON.
    • Seat Back Heat Mode Sw.
    • Seat Cool Mode Switch
    • Seat Heat Mode Sw.
    • If the reading does not change between Inactive and Active or Off and ON, refer to the Heated and Cooled Seat Switch component test. If the switch tests normal, replace the driver door lock/window switch.
    • If the readings test normal, but the driver heat/cool seat is inoperative, refer to Only One Heated/Cooled Seat is Inoperative.
  3. Observe the scan tool Passenger Door Switch parameters listed below while pressing and releasing the appropriate switch. The readings should change between Inactive and Active or Off and ON.
    • Seat Back Heat Mode Sw.
    • Seat Cool Mode Switch
    • Seat Heat Mode Sw.
    • If the reading does not change between Inactive and Active or Off and ON, refer to the Heated and Cooled Seat Switch component test. If the switch tests normal, replace the front passenger door lock/window switch.
    • If the readings test normal, but the passenger heat/cool seat is inoperative, refer to Only One Heated/Cooled Seat is Inoperative.
  4. If all heated and cooled seat functions operate normal, but the heated/cooled seat switch indicators do not illuminate or are always ON, refer to the Heated and Cooled Seat Switch component test. If the switch tests normal, replace the appropriate door lock/window switch.
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