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Navigation System Malfunction




Navigation System Malfunction

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

USB Port and SD Card Reader

The navigation system has a USB port and SD card reader slot located in the center console. The USB port and the card reader slot interface with a hub device, internal to the auxiliary jack, USB, and memory card receptacle assembly. The internal hub device interfaces directly with the radio via a USB cable. The auxiliary jack, USB, and memory card receptacle assembly receives fused battery voltage and ground from the harness to power the internal hub device as well as providing additional amperage to power USB devices.

The internal hub device interfaces directly with the radio via a standard USB cable. A Mini type USB connector is used to connect the cable at the USB port and at the radio. Standard USB male to female connections are typically used for connecting USB cables together where an in-line connection is required. An in-line cable connection is typically found between the console and I/P harness.

SD Card Reader

The navigation system in this vehicle uses an SD Card to store map information. The map database SD card must be inserted in the console SD card reader slot for the navigation system to function. If the map database SD card cannot be accessed, navigation related selections will not be available to the infotainment system. The SD card reader is dedicated for map data only, no other file types are supported.

USB Port

The USB port allows connectivity to the infotainment system from portable media players or a USB storage device (memory stick/ flash drive). When a device is connected to the USB port, the system detects the device and switches to USB as the audio source. Once connected, the device can be controlled from the radio controls.

Not all portable media player devices or file types are compatible. Refer to the owner's manual for information on USB devices, control, and operation.

Diagnostic Aids

* The purpose of this diagnostic is to determine the cause of the navigation system not operating or error messages related to accessing the map database SD card.

* If the vehicle concern is related to the auxiliary audio inputs only (auxiliary jack or USB), refer to Auxiliary Audio Input Malfunction Auxiliary Audio Input Malfunction.

* The navigation antenna requires a clear line of sight to the sky to operate properly. The GPS antenna may have limited, intermittent, or no reception near tall buildings or inside structures.

* The map data provided with the vehicle is the most up to date information available when the vehicle was produced. The map data is updated periodically, provided that the map information has changed. If the navigation system is operating, but the concern is related to map content/accuracy, refer to the GM Nav Disc center website, www.gmnavdisc.com.

Reference Information

Schematic Reference

Radio/Navigation System Schematics Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views Sunshade - Left (DH6)

Description and Operation

Radio/Audio System Description and Operation (with Color Display) Radio/Audio System Description and Operation (with Color Display)Radio/Audio System Description and Operation (with Monochrome Display) Radio/Audio System Description and Operation (with Monochrome Display)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Special Tools

EL-50334-50 - USB Cable and Adapter Kit

Circuit/System Verification

1. Verify no DTCs are present.

• If any DTCs are present
Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

• If no DTCs are present

2. Verify the map database SD card is fully inserted into the SD card reader slot.

3. Ignition ON, radio ON, select navigation using the radio controls.

4. Verify the system switches to navigation and map data is available.

• If the navigation system is unable to access the map data
Refer to Circuit/System Testing.

• If the navigation system accesses the map data

5. Move the vehicle to a location with an unobstructed view of the southern sky. Verify the No GPS symbol/message is not displayed.

• If the No GPS symbol/message is displayed
Refer to No Global Positioning System (GPS) Reception No Global Positioning System (GPS) Reception.

• If the No GPS symbol/message is not displayed

6. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the X83 auxiliary audio input.

2. Test for less than 10 ohms between the ground circuit terminal 4 and ground.

• If 10 ohms or greater

1. Ignition OFF.

2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, repair the open/high resistance in the ground connection.

• If less than 10 ohms

3. Verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.

• If the test lamp does not illuminate

1. Ignition OFF.

2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If the test lamp illuminates

4. Ignition OFF, reconnect the X1 harness connector at the X83 auxiliary audio input.

Note: USB cables and adapters for the following tests are found in the EL-50334-50 - USB cable and adapter kit.

5. Disconnect the USB cable connection at the X83 auxiliary audio input and at the I/P to floor console inline USB cable connector

6. Connect the EL-50334-2 Type A female to Mini B male USB Cable to the X83 auxiliary audio input and the I/P side of the I/P to floor console inline USB cable connector.

7. Ignition ON, radio ON, select navigation using the radio controls.

8. Verify the system does not access the map data SD card.

• If the navigation system accesses the map data
Replace the console side USB cable assembly.

• If the navigation system does not access the map data

9. Ignition OFF, connect the vehicle USB cable to the X83 auxiliary audio input.

10. Disconnect the USB cable at the A11 radio.

11. Connect the EL-50334-1 Type A male to Mini A male USB Cable to the A11 radio and the console side of the I/P to floor console inline USB cable connector.

12. Ignition ON, radio ON, select navigation using the radio controls.

13. Verify the system switches to navigation and map data is available.

• If the navigation system does not access the map data

1. Replace the X83 auxiliary audio input.

2. Connect all harness connectors

3. Verify the map database SD card is fully inserted and select navigation using the radio controls.

4. Verify the navigation system accesses the map data.

• If the navigation system does not access the map data, replace the A11 radio.

• If the navigation system accesses the map data

14. Replace the I/P side USB cable assembly.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Control Module References Control Module References for radio replacement, programming, and setup

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