USB Audio System Recognition/Play Error (FROM 12/2010): 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

   Condition	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 multi-media interface ECU and No. 1 stereo jack adapter assembly connectors.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying Multi-Media Interface ECU And No. 1 Stereo Jack Adapter Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M3-1 (UPI) - E46-4 (UPO)	Always	Below 1 Ω
   M3-4 (UJSG) - E46-1 (UESG)	Always	Below 1 Ω
   M3-2 (UDO-) - E46-3 (UDI-)	Always	Below 1 Ω
   M3-3 (UDO+) - E46-2 (UDI+)	Always	Below 1 Ω
   M3-5 (UJSS) - E46-5 (UESS)	Always	Below 1 Ω
   M3-1 (UPI) - Body ground	Always	10 kΩ or higher
   M3-4 (UJSG) - Body ground	Always	10 kΩ or higher
   M3-2 (UDO-) - Body ground	Always	10 kΩ or higher
   M3-3 (UDO+) - Body ground	Always	10 kΩ or higher
   M3-5 (UJSS) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to No. 1 Stereo Jack Adapter Assembly)
   *b	Front view of wire harness connector (to Multi-media Interface ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the multi-media interface ECU connector.
2. Measure the voltage according to the value(s) in the table below.
   Fig 2: Identifying Multi-Media Interface ECU Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   M3-1 (UPI) - M3-4 (UJSG)	Ignition switch 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 ignition switch off.

   HINT: 

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

2. Turn the ignition switch to 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 the USB device or "iPod" is recognized by the radio receiver assembly, or if information such as track, artist and album names are displayed on the screen.

   OK

   USB device or "iPod" is recognized or track information such as track, artist and album names are displayed.

NG → See step   7 

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