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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 B2462 >> Circuit/System Testing
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Circuit/System 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.
  1. Ignition OFF, disconnect the GPS coaxial cable from the GPS antenna.
  2. Ignition ON, test for 4.0-5.5 volts between the center conductor and the shield of the coaxial cable.
    • If not within the specified range, replace the GPS antenna.
  3. Ignition OFF, test for less than 5 ohms or resistance at the GPS coaxial cable center conductor from end to end.
    • If greater than the specified range, replace the GPS coaxial cable.
  4. Ignition OFF, test for infinite resistance between the center conductor and the outer conductor of the GPS coaxial cable.
    • If less than the specified range, replace the GPS coaxial cable.
  5. If all circuits test normal, replace the radio.
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