Pinpoint Test R: No Global Positioning System (GPS) Signal

Ford Work Solutions(TM)


Pinpoint Tests


Pinpoint Test R: No Global Positioning System (GPS) Signal

Normal Operation

The modem-antenna provides Global Positioning System (GPS) information from the GPS satellite system to the in-dash computer. This information is used to calculate vehicle position and direction of travel.

This pinpoint test is intended to diagnose the following:

- Obstructions to the modem-antenna line of sight
- Modem-antenna
- In-dash computer concern



PINPOINT TEST R: NO GPS SIGNAL

NOTE: Obstructions to the modem-antenna line of sight can affect the GPS location reliability.

NOTE: Wait at least 1 minute after turning the in-dash computer on before verifying the GPS signal.

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R1 CHECK THE SUBSCRIBER NETWORK COVERAGE


- Check that the vehicle is being diagnosed in a location that is within the subscriber network coverage. Refer to the Ford Work Solutions(TM) consumer website for coverage maps.
- Is the vehicle currently located within an area covered by the subscriber network?

Yes
GO to R2.

No
The vehicle cannot be diagnosed correctly at this location. ADVISE the customer to take the vehicle to a dealership within the subscriber network coverage.

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R2 CHECK THE GPS SIGNAL


- Enter the Navigation Diagnostic Screen. Refer to Ford Work Solutions(TM) Self-Diagnostic Mode Ford Work Solutions(TM) Self-Diagnostic Mode.
- Monitor the GPS signal strength by observing the bars on the upper left corner of the navigation display.




- Is a full signal (4 or 5 bars) present?

Yes
The system is operating correctly at this time. The concern may have been due to obstructions to the modem-antenna line of sight. ADVISE the customer that obstructions to the antenna line of sight can affect the GPS signal.

No
GO to R3.

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R3 ISOLATE THE MODEM-ANTENNA


- Install a new modem-antenna. Refer to Modem - Antenna Modem - Antenna.
- Test the system for normal operation.
- Does the system operate correctly?

Yes
The cause of the concern was an inoperative modem-antenna. The system is now operating correctly.

No
GO to R4.

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R4 CHECK FOR CORRECT IN-DASH COMPUTER OPERATION


- Disconnect all the in-dash computer connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the in-dash computer connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?

Yes
INSTALL a new in-dash computer. REFER to In-Dash Computer In-Dash Computer. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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