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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 452 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> Fuel Gauge Inaccurate or Inoperative (Dual Tank) >> Component Testing

Component Testing

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  1. Ignition OFF, remove the fuel level senders.
  2. Sweep each fuel level sensor through its full range of motion while measuring resistance between the signal terminal C and the low reference terminal B.
  3. Test for a minimum resistance value of 37-43 Ω and a maximum value of 245-255 Ω without any spikes or dropouts.
    • If minimum resistance is not 37-43 Ω, maximum resistance is not 245-255 Ω, or if there are any spikes or dropouts 

      Replace the appropriate fuel level sensor.

    • If minimum resistance is 37-43 Ω, maximum resistance is 245-255 Ω, and if there are no spikes or dropouts 
  4. All OK.
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