Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY MUSIC FILES IN USB DEVICE/iPod Is there any playable music file in the USB device/iPod?	Yes	Go to the next step.
1		No	System is normal. (No playable file in USB device/iPod) Go to Step 8.
2	INSPECT USB DEVICE/iPod Connect the USB device/iPod to a same-model vehicle (model/unit). Is the USB device/iPod connection detected/unit plays back.	Yes	Go to the next step.
2		No	System is normal. (USB device/iPod malfunction or incompatible USB device.) Go to Step 8.
3	INSPECT AUDIO UNIT CONNECTOR CONDITION Switch the ignition off (LOCK). Disconnect the negative battery cable. Disconnect the audio unit connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion or disconnection. Is there any malfunctioning part?	Yes	Repair or replace the connector, then go to Step 8.
3		No	Go to the next step.
4	INSPECT AUXILIARY JACK/USB PORT CONNECTOR CONDITION Disconnect the auxiliary jack/USB port connector. Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion or disconnection. Is there any malfunctioning part?	Yes	Repair or replace the connector, then go to Step 8.
4		No	Go to the next step.
5	INSPECT WIRING HARNESS FOR OPEN CIRCUIT BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT Verify that the connectors for the audio unit and the auxiliary jack/USB port are not disconnected. Inspect for continuity between the following terminals (vehicle wiring harness) Audio unit terminal 3A and auxiliary jack/USB port terminal UD Audio unit terminal 3B and auxiliary jack/USB port terminal UC Audio unit terminal 3C and auxiliary jack/USB port terminal UA Audio unit terminal 3D and auxiliary jack/USB port terminal UB Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness, then go to Step 8.
6	INSPECT WIRING HARNESS FOR SHORT TO GROUND BETWEEN AUDIO UNIT AND AUXILIARY JACK/USB PORT Inspect for continuity between the following wiring harness terminals (vehicle wiring harness side) and body ground Audio unit terminal 3A and auxiliary jack/USB port terminal UD Audio unit terminal 3B and auxiliary jack/USB port terminal UC Audio unit terminal 3C and auxiliary jack/USB port terminal UA Audio unit terminal 3D and auxiliary jack/USB port terminal UB Is there continuity?	Yes	Repair or replace the wiring harness, then go to Step 8.
6		No	Go to the next step.
7	INSPECT AUXILIARY JACK/USB PORT Inspect the auxiliary jack/USB port. (See AUXILIARY JACK/USB PORT INSPECTION .) Is there any malfunctioning part?	Yes	Replace the auxiliary jack/USB port, then go to the next step.(See AUXILIARY JACK/USB PORT REMOVAL/INSTALLATION .)
7		No	Go to the next step.
8	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Reconnect all of the disconnected connectors. Connect the negative battery cable. Clear the audio unit DTCs. (See CLEARING DTC [AUDIO] .) Perform the audio unit DTC inspection. (See DTC INSPECTION [AUDIO] .) Is the same DTC displayed?	Yes	Return to Step 1 and inspect for other possible causes. If the malfunction recurs, replace the center panel unit, then go to the next step. (See DTC TABLE [AUDIO] .)
8		No	Go to the next step.
9	VERIFY IF OTHER DTCs ARE DISPLAYED Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [AUDIO] .)
9		No	DTC troubleshooting completed.