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

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The vehicle must be driven outside of any enclosed structure to an area that is unobstructed by trees, tall buildings, and bridges.

J1 VERIFY THE SYMPTOM
- Move the vehicle outside of any enclosed structure to an area that is unobstructed by trees, tall buildings, and bridges.
- Turn the audio unit on.
- Press the MAP button.
  
  Fig 1: Verifying Symptom
  Courtesy of FORD MOTOR CO.
- Does the GPS icon disappear?
Yes: The system is operating correctly at this time.

No: GO to J2.
J2 CHECK THE RECORDED DTCS FROM THE AUDIO UNIT
- Check the recorded results from the audio unit self-test.
- Are any DTCs recorded?
Yes: For DTC B2204, GO to J4.

No: GO to J3.
J3 CHECK THE GPS ANTENNA MOUNTING
- Verify the GPS antenna is installed properly and no aftermarket equipment is obstructing it.
- Is the GPS antenna mounted properly?
Yes: GO to J4.

No: Properly INSTALL the GPS antenna. REFER to GLOBAL POSITIONING SYSTEM (GPS) ANTENNA . TEST the system for normal operation.
J4 SUBSTITUTE THE GPS ANTENNA
- Install a known good GPS antenna. Refer to GLOBAL POSITIONING SYSTEM (GPS) ANTENNA .
- Move the vehicle outside of any enclosed structure to an area that is unobstructed by trees, tall buildings, and bridges.
- Turn the audio unit on.
- Press the MAP button.
  
  Fig 2: Substituting GPS Antenna
  Courtesy of FORD MOTOR CO.
- Does the GPS icon disappear?
Yes: INSTALL a new GPS antenna. REFER to GLOBAL POSITIONING SYSTEM (GPS) ANTENNA . CLEAR the DTCs. REPEAT the self-test.

No: INSTALL the original GPS antenna. GO to J5.
J5 CHECK FOR CORRECT AUDIO UNIT OPERATION
- Disconnect all the audio unit connectors.
- Check for:
  - corrosion
  - 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?
Yes: REMOVE the audio unit. REFER to AUDIO UNIT . SEND the audio unit to an authorized repair facility. TEST the system for normal operation after the repair.

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.