USB Audio System Recognition/Play Error [08/2014 - ]: 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 (See article. Refer to SYSTEM DESCRIPTION [08/2014 - ] ).

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 (See article. Refer to SYSTEM DESCRIPTION [08/2014 - ] ).

   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

A 

END (USB DEVICE FORMAT WAS INCOMPATIBLE, "iPod" VERSION WAS INCOMPATIBLE, OR NO PLAYABLE FILES PRESENTED) 

Result:  B

B 

See step  2

1. Disconnect the H173 radio receiver assembly connector.
2. Disconnect the H174 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Radio Receiver Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H174-1 (UP1) - H173-1 (USV1)	Always	Below 1 Ω
   H174-2 (UDO-) - H173-2 (US1-)	Always	Below 1 Ω
   H174-3 (UDO+) - H173-3 (US1+)	Always	Below 1 Ω
   H174-4 (UJSG) - H173-4 (UGD1)	Always	Below 1 Ω
   H174-5 (UJSS) - H173-5 (USG1)	Always	Below 1 Ω
   H173-1 (USV1) - Body ground	Always	10 kΩ or higher
   H173-2 (US1-) - Body ground	Always	10 kΩ or higher
   H173-3 (US1+) - Body ground	Always	10 kΩ or higher
   H173-4 (UGD1) - Body ground	Always	10 kΩ or higher
   H173-5 (USG1) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  3

1. Disconnect the H158 radio receiver assembly connector.
2. Disconnect the H167 No. 1 stereo jack adapter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H158-12 (+B) - H167-6 (+B)	Always	Below 1 Ω
   H158-7 (GND2) - H167-5 (GND)	Always	Below 1 Ω
   H158-12 (+B) - Body ground	Always	10 kΩ or higher
   H158-7 (GND2) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  4

1. Disconnect the H167 and H174 No. 1 stereo jack adapter assembly connectors.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H174-1 (UP1) - H174-4 (UJSG)	Power switch on (ACC)	5 V
   H167-6 (+B) - H167-5 (GND)	Power switch off	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result:  NG

NG 

REPLACE RADIO RECEIVER ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  OK

OK 

See step  5

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 a backup of the music data is available before performing this operation.

   OK

   Malfunction disappears.

Result:  OK

OK 

END 

Result:  NG

NG 

See step  6

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 (See article. Refer to SYSTEM DESCRIPTION [08/2014 - ] ).

Result:  NEXT

NEXT 

See step  7

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:  OK

OK 

USB DEVICE OR "iPod" WAS INCOMPATIBLE OR DEFECTIVE 

Result:  NG

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(See article. Refer to PROBLEM SYMPTOMS TABLE [08/2014 - ] )