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

The 3.5mm (1/8 in.) auxiliary audio input jack is located in the center console. When a portable audio playback device is connected to the auxiliary jack, an internal switch pulls the detection signal circuit low and the radio will switch to AUX as the audio source. Audio signals from the device are sent to the radio from the auxiliary jack via the left, right, and common audio signal circuits.

Diagnostic Aids

* When a device is first connected to the 3.5mm (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.
* Playback of an audio device that is connected to the 3.5mm 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 (Connector Views)
Description and Operation

Radio/Audio System Description and Operation (Radio/Audio System Description and Operation)
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 (Programming and Relearning)for scan tool information

Circuit/System Verification

1. Ignition ON, radio ON, connect a portable audio playback device to the 3.5mm (1/8 in.) auxiliary audio input jack. Verify the infotainment system to switches AUX as the audio source.

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

2. 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 3.5mm (1/8 in.) auxiliary audio input jack, refer to Circuit/System Testing.

Circuit/System Testing

1. Ignition OFF, disconnect the X315 I/P to console harness connector.
2. Test for 900-1100 ohm between the audio common signal circuit I/P side connector terminal 5 and ground.

• If less than specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the radio.

• If greater than specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the radio.

3. Ignition ON, radio ON, test for less than 4.5-5.5 V between the auxiliary detection circuit I/P side connector terminal 8 and ground.

• If less than specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
• If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the radio.

4. Install a 3 A fused jumper between the X315 I/P side connector terminals 8 and 5. 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.

5. Ignition OFF, disconnect the X1 connector at the radio. Test for infinite resistance between the control circuits listed below and ground:

* left auxiliary audio circuit terminal 24
* right auxiliary audio circuit terminal 10

• If not the specified value, test the signal circuit for a short to ground.

6. Test for less than 5 ohm between the radio X1 terminal 24 and the X315 I/P harness side terminal 6.

• If greater than the specified value, test the signal circuit for an open/high resistance.

7. Test for less than 5 ohm between the radio X1 terminal 10 and the X315 I/P harness side terminal 7.

• If greater than the specified value, test the signal circuit for an open/high resistance.

8. If all circuits test normal, replace the auxiliary audio jack/harness assembly and reconnect all harness connectors. Connect and operate the portable audio playback device. If audio cannot be heard from the device, replace the radio.

Repair Instructions

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

Control Module References (Programming and Relearning)for Radio replacement, setup, and programming