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

Information and Entertainment System


Pinpoint Tests


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

Normal Operation

The Global Positioning System (GPS) antenna provides information from the GPS satellite system to the Audio Control Module (ACM). This information is used to calculate vehicle position and direction of travel.

- DTC B119F:01 (GPS Antenna: General Electrical Failure) - sets when any failure is detected in the GPS antenna circuit.
- DTC B119F:13 (GPS Antenna: Circuit Open) - sets when an open is detected in the GPS antenna circuit.

This pinpoint test is intended to diagnose the following:

- GPS antenna cable
- GPS antenna
- ACM



PINPOINT TEST I: NO GPS ANTENNA SIGNAL

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I1 CHECK FOR GPS-SIGNAL RELATED DTCs


- Clear the ACM DTCs.
- Carry out the ACM self-test.
- Is DTC B119F:01 or DTC B119F:13 retrieved?

Yes
GO to I2.

No
GO to I4.

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I2 ISOLATE THE LOWER GPS ANTENNA CABLE


- Install a new lower GPS antenna cable. Refer to Antenna Cable Antenna Cable.
- Carry out the ACM self-test.
- Is DTC B119F:01 or DTC B119F:13 retrieved?

Yes
The system is now operating correctly. The cause of the concern was an inoperative lower GPS antenna cable.

No
GO to I3.

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I3 ISOLATE THE UPPER GPS ANTENNA CABLE


- Install a new upper GPS antenna cable. Refer to Antenna Cable Antenna Cable.
- Carry out the ACM self-test.
- Is DTC B119F:01 or DTC B119F:13 retrieved?

Yes
The system is now operating correctly. The cause of the concern was an inoperative upper GPS antenna cable.

No
GO to I4.

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I4 ISOLATE THE GPS ANTENNA


- Install a new GPS antenna. Refer to Global Positioning System (GPS) Antenna Service and Repair.
- Operate the audio system in navigation mode and observe the display.
- Does the navigation display operate correctly?

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

No
GO to I5.

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I5 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?

Yes
INSTALL a new ACM. REFER to Audio Control Module (ACM) Audio Control Module (ACM). 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. CLEAR any DTCs present.

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