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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1146 (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 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ON the ignition. Disconnect the GPS coaxial cable from the GPS antenna. Verify there is 4-5.5 volts between the center conductor and the shield of the coaxial cable.
    • If 4-5.5 volts are present, replace the GPS antenna.
  2. Turn the ignition OFF. Disconnect the GPS coaxial cable from the radio. Test the resistance of the GPS coaxial cable center conductor from end to end. Verify the resistance is less than 5 ohms.
    • If the resistance greater than 5 ohms, replace the GPS coaxial cable.
  3. Test the resistance of the GPS coaxial cable between the center conductor and the outer conductor. Verify there is infinite resistance between both conductors.
    • If there is less than infinite resistance between the inner conductor and the outer conductor of the GPS coaxial cable, replace the GPS coaxial cable. If the GPS coaxial cable tests normal, replace the radio.
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