USB Audio System Recognition/Play Error: Procedure

1. Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly.
2. Check if playable files are present on the USB device or "iPod".

   HINT: 

   Refer to System Description for playable files. Refer to SYSTEM DESCRIPTION .

3. Check if the USB device is a compatible format or "iPod" is a compatible version.

   HINT: 

   Refer to System Description for compatible formats and versions. Refer to SYSTEM DESCRIPTION .

   Result

   Result	Proceed to
   No playable files exist, or incompatible device format or version	A
   Playable files exist, and compatible device format or version	B

B → See step   2 

A → USB DEVICE FORMAT WAS INCOMPATIBLE, "iPod" VERSION WAS INCOMPATIBLE, OR NO PLAYABLE FILES PRESENT 

1. Disconnect the No. 1 stereo jack adapter assembly connector.
   Fig 1: Identifying Navigation ECU Sub-Assembly - No. 1 Stereo Jack Adapter Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the navigation ECU sub-assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L124-1 (UPI) - L131-1 (USV1)	Always	Below 1 Ω
   L124-2 (UDO-) - L131-2 (US1-)	Always	Below 1 Ω
   L124-3 (UDO+) - L131-3 (US1+)	Always	Below 1 Ω
   L124-4 (UJSG) - L131-4 (UGD1)	Always	Below 1 Ω
   L124-5 (UJSS) - L131-5 (USG1)	Always	Below 1 Ω
   L124-1 (UPI) - Body ground	Always	10 kΩ or higher
   L124-2 (UDO-) - Body ground	Always	10 kΩ or higher
   L124-3 (UDO+) - Body ground	Always	10 kΩ or higher
   L124-4 (UJSG) - Body ground	Always	10 kΩ or higher
   L124-5 (UJSS) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Navigation ECU Sub-assembly)
   *b	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the navigation ECU sub-assembly connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying No. 1 Stereo Jack Adapter Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L124-1 (UPI) - L124-4 (UJSG)	Power switch on (ACC)	5 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)

NG → See step   8 

OK: Go to next step 

1. Delete all files in the USB device or "iPod" and format/restore it.
2. Save the data again and check if it can be played on the in-vehicle device.
   NOTE:

   Formatting a USB device or restoring an "iPod" erases all music on the device. Ensure that backup music data is available before performing this operation.

   OK

   Malfunction disappears.

NG → See step   5 

OK → END 

1. Turn the power switch off.

   HINT: 

   When this malfunction occurs, it is necessary to turn off the power switch to make it possible for the vehicle to recognize a new device when it is connected.

2. Turn the power switch on (ACC).
3. Connect a known good USB device or "iPod" to the No. 1 stereo jack adapter assembly.

   HINT: 

   • If the malfunction occurred when a USB device was in use, use another USB device for the inspection. If the malfunction occurred when an "iPod" was in use, use another "iPod" for the inspection.
   • Refer to System Description for compatible formats and versions. Refer to SYSTEM DESCRIPTION .

NEXT: Go to next step 

1. Check if a USB device or "iPod" is recognized by the navigation ECU sub-assembly, and if information such as track, artist and album names are displayed on the screen.

   OK

   Malfunction disappears.

NG → See step   7 

OK → USB DEVICE OR "iPod" WAS INCOMPATIBLE OR DEFECTIVE