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Pinpoint Test M: No Global Positioning System (GPS) Antenna Signal

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. M1 CHECK THE OPERATION OF THE NAVIGATION SYSTEM 
    • Move the vehicle outside of any enclosed structure to an area that is unobstructed by trees, tall buildings, and bridges.
      • Fig 1: Substituting GPS Antenna
      GF0004556Courtesy of FORD MOTOR CO.
    • Operate the audio unit in navigation mode.
    • Does the GPS icon appear, then disappear? 
    1. YES  : The system is operating correctly at this time. NOTIFY the customer that obstructions to the line of sight may affect the GPS antenna.
    2. NO  : Go to  M2.
  2. M2 CHECK THE AUDIO UNIT RECORDED DTCs 
    • Check the recorded DTCs from the audio unit self-test.
    • Is DTC B2204 recorded? 
    1. YES  : Go to  M4.
    2. NO  : Go to  M3.
  3. M3 CHECK THE GPS ANTENNA MOUNTING 
    • Verify the GPS antenna is installed correctly and no aftermarket equipment is obstructing the antenna.
    • Is the GPS antenna mounted correctly? 
    1. YES  : Go to  M4.
    2. NO  : Correctly INSTALL the GPS antenna. REFER to Global Positioning System (GPS) Antenna . TEST the system for normal operation.
  4. M4 SUBSTITUTE THE GPS ANTENNA 
    • Install a known good GPS antenna.
    • Move the vehicle outside of any enclosed structure to an area that is unobstructed by trees, tall buildings, and bridges.
      • Fig 2: Substituting GPS Antenna
      GF0004556Courtesy of FORD MOTOR CO.
    • Operate the audio unit in navigation mode.
    • Does the GPS icon appear, then disappear? 
    1. YES  : INSTALL a new GPS antenna. REFER to Global Positioning System (GPS) Antenna . CLEAR the DTCs. REPEAT the self-test.
    2. NO  : INSTALL the original GPS antenna. Go to  M5 .
  5. M5 CHECK FOR CORRECT AUDIO UNIT OPERATION 
    • Disconnect all the audio unit connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the audio unit connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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