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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1083 (Information System And Entertainment Systems) >> Diagnostic Tests >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test N: No Global Positioning System (GPS) Antenna Signal >> Pinpoint Test N: No Global Positioning System (GPS) Antenna Signal

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

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. N1 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.
    • Operate the audio system in navigation mode.
      • Fig 1: Checking Operation Of Navigation System
      GF0004556Courtesy of FORD MOTOR CO.
    • 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  N2.
  2. N2 CHECK THE ACM RECORDED DTCs 
    • Check the recorded DTCs from the ACM self-test.
    • Is DTC B2204 recorded? 
    1. YES  : Go to  N4.
    2. NO  : Go to  N3.
  3. N3 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  N4.
    2. NO  : Correctly INSTALL the GPS antenna. REFER to Global Positioning System (GPS) Antenna . TEST the system for normal operation.
  4. N4 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.
    • Operate the audio system in navigation mode.
      • Fig 2: Checking Operation Of Navigation System
      GF0004556Courtesy of FORD MOTOR CO.
    • 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  N5 .
  5. N5 CHECK FOR CORRECT ACM OPERATION 
    • Disconnect all the ACM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the ACM 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 ACM. REFER to Audio Control Module (ACM) . 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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