Chevrolet Trax: Auxiliary audio input 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.
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.
All circuits from the auxiliary jack are
connected directly to the radio. When a device is connected to the auxiliary
jack an internal switch opens. 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.
USB Port
The vehicle may be equipped with a USB port in the console. 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. 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 (Encore), Radio/Navigation System
Schematics (Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Radio/Audio System Description and Operation (with Monochrome Display),
Radio/Audio System
Description and Operation (with Color Display)
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-50334-20 Multi-Media Interface Tester (MIT)
- EL-50334-50 USB Cable and Adapter Kit
For equivalent regional tools, refer to Special Tools, Special Tools (MIT
tool instructions)
Circuit/System Verification
Auxiliary Audio Input Jack
- Verify no DTCs are present.
If any DTCs are present
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
If no DTCs are present
- Ignition ON, radio ON.
- Verify the infotainment system switches to AUX as the audio source with
the EL-50334-20 Multi-Media
Interface Tester (MIT) 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 - Auxiliary Input Jack.
If the infotainment system switches to AUX as the audio source
- Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT)
is heard through the vehicle
infotainment system while operating the test tool to begin audio playback.
If audio is not heard from the test tool.
Refer to Circuit/System Testing - Auxiliary Input Jack.
If audio is heard from the test tool.
- All OK
USB Port
- Verify no DTCs are present.
If any DTCs are present
Refer to Diagnostic Trouble Code (DTC) List - Vehicle
If no DTCs are present
- Ignition ON, radio ON.
- Verify the infotainment system switches to USB as the audio source with
the EL-50334-20 Multi-Media
Interface Tester (MIT) connected to the USB port.
If the infotainment system does not switch to USB as the audio source
Refer to Circuit/System Testing - USB Port.
If the infotainment system switches to USB as the audio source
- Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT)
is heard through the vehicle
infotainment system while operating the system to play audio from the test
tool.
- If audio is not heard from the test tool.
Refer to Circuit/System Testing - USB Port.
- If audio is heard from the device
- All OK.
Circuit/System Testing
Auxiliary Audio Input Jack
- Ignition OFF, disconnect the X1 harness connector at the X83 Auxiliary
Audio Input. Ignition ON, radio
ON.
- Test for 2.5-3.5 V between the signal circuit terminal 5 and ground.
If less than 2.5 V
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
- 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
- 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
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio,
ignition ON.
- 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
- 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
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
Ignition ON.
- 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
- Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
- Test for infinite resistance between the signal circuits listed below
and ground:
- Auxiliary audio common signal circuit terminal 23
- Left auxiliary audio signal circuit terminal 24
- Right auxiliary audio signal circuit terminal 10
- If less than infinite resistance
Repair the short to ground on the circuit.
If infinite resistance
- Test for less than 5 ohms between the signal circuit terminals listed
below:
- A11 Radio terminal 24 X1 and the X83 Auxiliary Audio Input terminal 1 X1
- A11 Radio terminal 10 X1 and the X83 Auxiliary Audio Input terminal 2 X1
- A11 Radio terminal 23 X1 and the X83 Auxiliary Audio Input terminal 3 X1
- If 5 ohms greater
Repair the open/high resistance in the circuit.
If less than 5 ohms
- Replace the X83 Auxiliary Audio Input. Connect all harness connectors.
- Connect and operate the EL-50334-20 Multi-Media Interface Tester (MIT).
- Verify the audio from the test tool is heard through the vehicle
infotainment system.
If audio is not heard from the test tool
Replace the A11 Radio.
If audio is heard from the test tool
- All OK.
USB Port
- 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.
- Connect the EL-50334-1 Type A male to Mini A male USB Cable to the A11
Radio. Connect the EL-
50334-3 Type A female to Type A female adapter to the EL-50334-1 Cable.
- Ignition ON, radio ON, connect the EL-50334-20 Multi-Media Interface
Tester (MIT) to the EL-50334-3
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 A11 Radio
If the infotainment system switches to USB as the audio source
- Ignition OFF, connect the vehicle USB cable to the A11 Radio. Disconnect
the I/P to floor console inline
USB cable connector.
NOTE: The EL-50334-3 or EL-50334-4 adapter may be required for the
following
test.
- Ignition ON, radio ON, connect the EL-50334-20 Multi-Media Interface
Tester (MIT) to the I/P side of
the inline USB cable connector.
- 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 I/P USB cable assembly.
If the infotainment system switches to USB as the audio source
- Ignition OFF, connect the I/P to floor console inline USB cable
connector.
- Disconnect the USB cable at the X83 Auxiliary Audio Input. Connect the
EL-50334-4 Type A female to
Mini B female adapter to the USB cable.
- Ignition ON, radio ON, connect the EL-50334-20 Multi-Media Interface
Tester (MIT) 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 console USB cable assembly.
If the infotainment system switches to USB as the audio source
- Test or replace the X83 Auxiliary Audio Input.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Audio Disc Player and USB Receptacle Replacement (Encore), Audio Disc
Player and USB
Receptacle Replacement (Trax)
- Control Module References for radio replacement, programming, and setup.
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Perform the Diagnostic System Check - Vehicle prior to using this
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approach.
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approach.
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SEE MORE:
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.
DTC Descriptors
D
Removal Procedure
With the engine OFF, apply and release the brake pedal several times
until the pedal becomes firm to
deplete the power vacuum brake booster vacuum reserve.
Remove the battery tray. Refer to Battery Tray Replacement .
Disconnect the power vacuum brake booster vacuum sensor el