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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 113 (Seat Heating System & Seat Cooling System) >> Diagnostic Information and Procedures >> DTC B2435 or B2440 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the MSM harness connector C5.
  2. Test for a minimum of 850 ohms of resistance from the signal circuit to ground.
    • If less than 850 ohms, test the signal circuit for a short to ground. If the circuit tests normal, replace the seat back heater element.
  3. If all circuits test normal, replace the MSM.
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