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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 Seat Inoperative - Rear >> Circuit/System Verification

Circuit/System Verification

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  1. Engine running, observe the scan tool Rear HVAC/RSA parameters listed below while pressing and releasing the appropriate heated seat switch. The reading should change between Inactive and Active and the appropriate switch indicators should illuminate.
    • Left Rear Heated Seat Switch
    • Right Rear Heated Seat Switch
    • If not the specified values, replace the auxiliary heater and air conditioning control module.
    • If the scan tool parameters test normal, but, the switch indicators do not illuminate, replace the auxiliary heater and air conditioning control module.
  2. If all scan tool parameters test normal and there are no DTCs set, replace the RHSM.
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