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Home >> Hummer >> 2010 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 1428 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> OnStar Button Malfunction >> Component Testing
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Component Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the button assembly.
  2. Test for infinite resistance between the keypad supply voltage terminal A and the keypad signal terminal B.
    • If less than the specified range, replace the button assembly.
  3. Test for 1.4 k-1.6 k Ω between the keypad supply voltage terminal A and the keypad signal terminal B while pressing the red emergency button.
    • If not within the specified range, replace the button assembly.
  4. Test for 2.7 k-3.3 k Ω between the keypad supply voltage terminal A and the keypad signal terminal B while pressing the blue On-Star® button.
    • If not within the specified range, replace the button assembly.
  5. Test for 12.5 k-13.5 k Ω between the keypad supply voltage terminal A and the keypad signal terminal B while pressing the black phone button.
    • If not within the specified range, replace the button assembly.
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