Service Information

Cruze

No Global Positioning System (GPS) Reception

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit Description

The global positioning system aerial is connected to the navigation radio by a coaxial cable. The aerial cable also provides a path for DC current for powering the aerial.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Note: The global positioning system requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.

Ignition OFF, disconnect the global positioning system aerial coax cable from the A11 radio.
Ignition ON, radio ON, test for 4.5-5.5 V between the GPS coax cable connection centre conductor on the radio and ground.

⇒	If not within the specified range, replace the A11 radio.

Ignition OFF, reconnect the aerial coax cable at the A11 radio. Disconnect the aerial coax cable from the T4E global positioning system aerial.
Ignition ON, radio ON, test for 4.5-5.5 V between the aerial coax cable centre terminal and outer shield.

⇒	If less than the specified range, test the aerial coax cable for an open/high resistance.

⇒	If greater than the specified range, test the aerial coax cable for a short to voltage.

If all circuits test normal, replace the T4E global positioning system aerial.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for Radio replacement, setup, and programming