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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1295 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2462 (Communication Interface Module) >> Circuit/System Testing (Communication Interface Module)
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Circuit/System Testing (Communication Interface Module)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the navigation antenna coax cable from the CIM.
  2. Ignition ON, test for 4.5-5.5 V between the CIM coax cable center conductor terminal at the module and ground.
    • If not within the specified range, replace the CIM.
  3. Reconnect the coax cable to the CIM. Disconnect the coax cable from the navigation antenna.
  4. Test for 4.5-5.5 V between the coax cable center conductor and the outer shield.
    • If not within the specified range, replace the coax cable.
  5. If all circuits test normal, replace the navigation antenna.
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