Auxiliary Audio Input Malfunction

Auxiliary Audio Input 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.

Circuit/System Description

Auxiliary Audio Input Jack

The infotainment system has a 3.5mm (1/8 in.) auxiliary audio input jack available on the face of the radio. This input interfaces internally with the radio, no external circuits are involved. When a portable audio playback device is connected to an auxiliary jack, an internal switch detects the connection and the radio will switch to AUX as the audio source.

USB Port

The vehicle may be equipped with a USB port in the instrument panel compartment. This port allows USB 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.

The USB port is connected to the radio via a standard USB cable. Mini type USB connectors are used to connect the cable at the USB port and at the radio or multimedia player interface module. 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.

Not all portable media player devices are compatible. Memory stick/ flash drive capability is limited to MP3 and WMA file types only. Video transfer from any device is not supported. Refer to the owner's manual for information on USB devices, control, and operation.

Diagnostic Aids

Auxiliary Audio Input Jack

* When a device is first connected to the 3.5 mm (1/8 in) input jack the infotainment system automatically switches to that device. If an auxiliary device has already been connected, press the AUX or CD/AUX button to select the device.

* If the system detects the device, but the audio is not heard or is not clear, attempt to connect the device using a different cable; cables can deteriorate over time or become damaged.

* Playback of an audio device that is connected to the 3.5 mm jack can only be controlled using the controls on the device.

* The volume control on the device may need to be adjusted to ensure sufficient playback volume through the infotainment system.

USB

* When a device is first connected to the USB port, the infotainment system automatically switches to that device. If an auxiliary device has already been connected, press the AUX or CD/AUX button to select the device.

* A low battery condition in a portable media player may not allow the device to connect to the system, or can create communication issues with the device. Verify the device battery state of charge and re-charge or replace as needed.

* Connect the device directly to the USB port if possible. Only use a cable if it is required to connect the device. The use of extension cables can cause communication issues.

* If a cable is required for connection, attempt to connect the device using a different cable; cables can deteriorate over time or become damaged.

* Attempt audio playback from multiple USB devices when diagnosing USB concerns. Device compatibility can vary based on vehicle equipment. If the infotainment system is capable of operating any USB type device, the cause of the concern is not with the vehicle system. The inoperative device(s) may be incompatible or contain no recognized media types.

* If a ‘Device Not Supported' or similar type error message is displayed, this indicates the system has connected to the device but cannot communicate with it properly. This does not indicate an issue with the vehicle system. The device may be incompatible, may require a ‘reset', or may require an update to its software/firmware.

* If a ‘No Supported Data Found' or similar type error message is displayed, this indicates the system has connected to the device and is communicating, but cannot find any compatible files/data. This does not indicate an issue with the vehicle system. Verify the device contains compatible media/file types.

* Poor connections or damaged USB cables can cause intermittent or no operation of USB devices. Inspect connectors, terminals, and cables for damage and replace components as necessary. Ensure all USB inline connections and connections at components are fully seated and connector position retainers/locks are secure.

Reference Information

Schematic Reference

Radio/Navigation System Schematics Radio/Navigation System Schematics

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Radio/Audio System Description and Operation Radio/Audio System

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

Auxiliary Audio Input Jack

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

2. Ignition ON, radio ON, connect a portable audio playback device to the auxiliary audio input jack on the radio. Verify the infotainment system to switches AUX as the audio source.

• If the infotainment system does not switch to AUX as the audio source, replace the radio.

3. Operate the device to begin audio playback, adjusting the volume on the device if necessary. Verify the audio from the device is heard through the vehicle infotainment system.

• If audio is not heard from the device, attempt to playback audio from another device. If audio cannot be heard from any device connected to the auxiliary audio input jack, replace the radio.

USB Port

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

2. Inspect the USB port for damage.

• If damage is noted, replace the USB port.

3. Ignition ON, radio ON, connect a device to the USB port. Verify the infotainment system to switches USB as the audio source.

• If the infotainment system does not switch to USB as the audio source, refer to Circuit/System Testing.

4. Operate the radio controls to play audio from the device. Verify the audio from the device is heard through the vehicle infotainment system.

• If audio is not heard from the device, attempt to playback audio from another device. If audio cannot be heard from any device connected to the USB port, or the audio heard is not clear, refer to Circuit/System Testing.

Circuit/System Testing

USB Port

1. Ignition OFF, disconnect the USB cable connection at the A11 radio.

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

2. Connect the EL-50334-2 Type A female to Mini B male USB Cable to the A11 radio.

3. Ignition ON, radio ON, connect a USB device to the EL-50334-2 cable. Verify the infotainment system switches to USB as the audio source.

• If the infotainment system does not switch to USB as the audio source, replace the A11 radio.

4. Ignition OFF, reconnect the vehicle USB cable to the A11 radio.

5. Disconnect the USB cable at the USB receptacle.

6. Connect the EL-50334-4 Type A female to Mini B female adapter to the USB cable.

7. Ignition ON, radio ON, connect a USB device to the EL-50334-4 adapter. Verify the infotainment system switches to USB as the audio source.

• If the infotainment system does not switch to USB as the audio source, replace the USB cable assembly.

8. If all circuits test normal, replace the USB receptacle.

Repair Instructions

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

* USB Receptacle Replacement (Enclave) Service and RepairUSB Receptacle Replacement (Acadia/Traverse) Service and Repair

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