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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1038 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2470 >> Component Testing
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Component Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.
  1. Disconnect the cellular antenna coax connector from the VCIM and the cellular antenna.
  2. Test for infinite resistance between the center conductor and the outer metal shield of the cellular antenna coax cable.
    • If meter does not read infinite, replace the cellular antenna coax cable.
  3. Test for less than 1 ohm of resistance at the cellular antenna coax connector from end to end.
    • If greater than specified value, replace the cellular antenna coax cable.
  4. Ignition OFF, connect a fused jumper wire between coaxial center conductor and the metal outer shield at the VCIM antenna coax cable connector.
  5. Ignition ON, verify that DTC B2470 is not current.
    • If DTC B2470 is still current, replace the VCIM.
  6. If all circuits test normal, replace the cellular antenna.
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