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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1095 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2476 or B2482 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  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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