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.
Diagnostic Fault Information
Circuit/System Description
Auxiliary Audio Input Jack
The 3.5 mm (1/8 in.) auxiliary audio input jack is located in the console. When a portable audio playback device is connected to the auxiliary jack, an internal switch opens the detection signal circuit and the radio will switch to AUX as the audio source. The radio detects the device and switches to AUX as the audio source. Audio signals from the device are sent to the radio from the auxiliary input jack via the left, right, and common audio signal circuits.
The infotainment 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 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 human machine interface module via a standard USB cable. A Mini type USB connector is used to connect the cable at the USB port and at the human machine interface module and at the auxiliary jack, USB, and memory card receptacle. 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.
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.
SD Card Reader
The infotainment uses the SD card reader as a mass storage device, similar to a USB storage device.
Refer to the owners manual for information on media types supported via the SD card reader.
Diagnostic Aids
Note: This diagnostic information only pertains to the 3.5 mm auxiliary 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.
Reference Information
Schematic Reference
Radio/Navigation System Schematics Radio/Navigation System Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
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.
• If no DTCs are present
2. Ignition ON, infotainment system ON.
3. Verify the infotainment system switches to AUX as the audio source with a portable audio playback device connected to the auxiliary audio input jack.
• If the infotainment system does not switch to AUX as the audio source
Refer to Circuit/System Testing.
• If the infotainment system switches to AUX as the audio source
4. Verify the audio from the device is heard through the vehicle infotainment system while operating the device to begin audio playback, adjusting the volume on the device if necessary.
• If audio is not heard from the device
1. Connect a different device to the auxiliary audio jack.
2. Verify the audio from the device is heard through the vehicle infotainment system while operating the device to begin audio playback, adjusting the volume on the device if necessary.
• If audio cannot be heard from any device connected to the auxiliary audio input jack, refer to Circuit/System Testing.
• If audio can be heard from device.
3. The malfunction is related to the external device connected to the input.
• If audio is heard from the device
5. All OK.
Circuit/System Testing
1. Ignition OFF, disconnect the X1 harness connector at the X83 auxiliary audio input. Ignition ON, infotainment system ON.
2. Test for 2.5-3.5 V between the signal circuit terminal 5 and ground.
• If less than 2.5 V
1. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the A11 radio.
• If greater than 3.5 V
1. Ignition OFF, disconnect the X1 harness connector at the A11 radio, ignition ON.
2. Test for less than 1 V between the detection circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the A11 radio.
• If between 2.5-3.5 V
3. Test for less than 1 V between the signal circuits listed below and ground:
* left auxiliary audio signal circuit terminal 1
* right auxiliary audio signal circuit terminal 2
* auxiliary audio common signal circuit terminal 3
• If 1 V or greater
1. Ignition OFF, disconnect the X1 harness connector at the A11 radio. Ignition ON.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the A11 radio.
• If less than 1 V
4. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
5. Test for infinite resistance between the signal circuits listed below and ground:
* auxiliary audio common signal circuit terminal 8
* left auxiliary audio signal circuit terminal 9
* right auxiliary audio signal circuit terminal 10
• If less than infinite resistance
Repair the short to ground on the circuit.
• If infinite resistance
6. Test for less than 5 ohms between the signal circuit terminals listed below:
* A11 radio signal circuit terminal 9 X1 and the X83 auxiliary audio input signal circuit terminal 1 X1
* A11 radio signal circuit terminal 10 X1 and the X83 auxiliary audio input signal circuit terminal 2 X1
* A11 radio signal circuit terminal 8 X1 and the X83 auxiliary audio input signal circuit terminal 3 X1
• If 5 ohms or greater
Repair the open/high resistance in the circuit.
• If less than 5 ohms
7. Replace the X83 auxiliary audio input. Connect all harness connectors.
8. Connect and operate the portable audio playback device.
9. Verify the audio from the device is heard through the vehicle infotainment system with a portable audio playback device connected to the auxiliary audio input jack, operating the device to begin audio playback, adjusting the volume on the device if necessary.
• If audio is not heard from the device
Replace the A11 radio.
• If audio is heard from the device
10. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Audio Disc Player, USB, Auxiliary In, and Memory Card Receptacle Replacement Service and Repair
* Control Module References Control Module References for radio replacement, programming, and setup.