USB Audio System Recognition/Play Error [09/2016 - 09/2017]: 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 [10/2014 - 09/2017]

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 [10/2014 - 09/2017]

   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

Result: 

A 

END (USB DEVICE FORMAT IS INCOMPATIBLE, "iPod" VERSION IS INCOMPATIBLE, OR NO PLAYABLE FILES EXIST) 

Result: 

B 

See step  2

1. Disconnect the I46 and I99 radio receiver assembly connectors.
2. Disconnect the I3 and I103 No. 1 stereo jack adapter assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I46-7 (GND2) - I3-5 (GND)	Always	Below 1 Ω
   I46-12 (+B) - I3-6 (+B)	Always	Below 1 Ω
   I99-1 (USV1) - I103-1 (USV1)	Always	Below 1 Ω
   I99-2 (US1-) - I103-2 (US1-)	Always	Below 1 Ω
   I99-3 (US1+) - I103-3 (US1+)	Always	Below 1 Ω
   I99-4 (UGD1) - I103-4 (UGD1)	Always	Below 1 Ω
   I99-5 (USG1) - I103-5 (USG1)	Always	Below 1 Ω
   I46-7 (GND2) or I3-5 (GND) - Body ground	Always	10 kΩ or higher
   I46-12 (+B) or I3-6 (+B) - Body ground	Always	10 kΩ or higher
   I99-1 (USV1) or I103-1 (USV1) - Body ground	Always	10 kΩ or higher
   I99-2 (US1-) or I103-2 (US1-) - Body ground	Always	10 kΩ or higher
   I99-3 (US1+) or I103-3 (US1+) - Body ground	Always	10 kΩ or higher
   I99-4 (UGD1) or I103-4 (UGD1) - Body ground	Always	10 kΩ or higher
   I99-5 (USG1) or I103-5 (USG1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the No. 1 stereo jack adapter assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   I103-1 (USV1) - I103-4 (UGD1)	Power switch on (ACC)	4.5 to 5.5 V
   I3-6 (+B) - I3-5 (GND)	Power switch off	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO RECEIVER ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2017] 

Result: 

OK 

See step  4

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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END 

Result: 

NG 

See step  5

1. Turn the power switch off.

   HINT: 

   When this malfunction occurs, it is necessary to turn the power switch off 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 [10/2014 - 09/2017]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Check if a USB device or "iPod" is recognized by the radio receiver assembly, and if information such as track, artist and album names is displayed on the screen.

   OK

   USB device or "iPod" is recognized properly and the information is displayed on the screen.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USB DEVICE OR "iPod" WAS INCOMPATIBLE OR DEFECTIVE 

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2016 - 09/2017]