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Navigation System Malfunction

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 provide an overview of each diagnostic category.

Circuit/System Description

USB Port and SD Card Reader

The navigation system has a USB port and SD card reader slot located in the centre 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 .
    • 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 centre website, www.gmnavdisc.com.

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Radio/Audio System Description and Operation

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

Special Tools

EL-50334-50 USB Cable and Adapter Kit

Circuit/System Verification
  1. Verify no DTCs are present.
    2. ⇒If any DTCs are present, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
  2. Inspect the card reader for damage.
    3. ⇒If damage is noted, replace the card reader.
  3. Verify the map database SD card is fully inserted into the SD card reader slot.
  4. Ignition ON, radio ON, select navigation using the radio controls. Verify the system switches to navigation and map data is available.
    5. ⇒If the navigation system is unable to access the map data, refer to Circuit/System Testing.
    ⇒If the navigation system functions, but the no GPS symbol/message is displayed continuously, refer to No Global Positioning System (GPS) Reception .

Circuit/System Testing
  1. Ignition OFF, disconnect the X1 harness connector at the X83 auxiliary audio input.
  2. Test for less than 5 Ω between the ground circuit terminal 4 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 6 and ground.
    4. ⇒If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition OFF, reconnect the X1 harness connector at the X83 auxiliary audio input.

    5. 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 X216 I/P to floor console harness USB 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 X216 I/P to floor console harness USB connector.
  7. Ignition ON, radio ON, select navigation using the radio controls. Verify the system does not access the map data SD card.
    8. ⇒If the navigation system accesses the map data disc, replace the console side USB cable.
  8. Ignition OFF, reconnect the vehicle USB cable to the X83 auxiliary audio input.
  9. Disconnect the USB cable at the A11 radio.
  10. Connect the EL-50334-1 Type A male to Mini A male USB Cable to the A11 radio and the console side of the X216 I/P to floor console harness USB connector.
  11. Ignition ON, radio ON, select navigation using the radio controls. Verify the system does not access the map data SD card.
    12. ⇒If the navigation system accesses the map data disc, replace the I/P side USB cable.
  12. If all circuits test normal, replace the X83 auxiliary audio input and reconnect all harness connectors. Verify the map database SD card is fully inserted and select navigation using the radio controls. If the map database is still inaccessible, replace the map database SD card. If the map database is still inaccessible, replace the A11 radio.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Audio Disc Player Receptacle Replacement
    •  USB Receptacle Replacement
    • Control Module References for Radio or multimedia player interface module replacement, setup, and programming
   


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