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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Cellular, Entertainment, And Navigation >> Diagnostic Information and Procedures >> DTC B2476 or B2482 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the inside rearview mirror.
  2. Ignition ON, test for 9.8-10.2 volts between the keypad supply voltage circuit terminal 12 and ground.
    • If less than the specified range, test the supply voltage circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the VCIM.
    • If greater than the specified range, test the supply voltage circuit for a short to voltage. If the circuit tests normal, replace the VCIM.
  3. Ignition OFF, test for 1 volt between the keypad signal circuit terminal 11 and ground.
    • If greater than the specified range, test the keypad signal circuit for a short to voltage or open/high resistance. If the circuit tests normal, replace the VCIM.
  4. Ignition ON, test for 9.8-10.2 volts between the keypad supply voltage circuit terminal 12 and the keypad signal circuit terminal 11.
    • If less than the specified range, test the keypad signal circuit for an open/high resistance. If the circuit tests normal, replace the VCIM.
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