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 radio and display receiver assembly connector.
2. Disconnect the No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying L193 & L186 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L186-1 (UPI) - L193-1 (UPO)	Always	Below 1 Ω
   L186-2 (UDO-) - L193-2 (UDO-)	Always	Below 1 Ω
   L186-3 (UDO+) - L193-3 (UDO+)	Always	Below 1 Ω
   L186-4 (UJSG) - L193-4 (UESG)	Always	Below 1 Ω
   L186-5 (UJSS) - L193-5 (USG1)	Always	Below 1 Ω
   L186-1 (UPI) - Body ground	Always	10 kΩ or higher
   L186-2 (UDO-) - Body ground	Always	10 kΩ or higher
   L186-3 (UDO+) - Body ground	Always	10 kΩ or higher
   L186-4 (UJSG) - Body ground	Always	10 kΩ or higher
   L186-5 (UJSS) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Radio and Display Receiver 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 radio and display receiver assembly connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying L186 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L186-1 (UPI) - L186-4 (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 radio and display receiver 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