Audio And Visual System (W/O Multi-Display) Usb Audio System Recognition/Play Error

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK USB DEVICE OR "iPod"

CHECK HARNESS AND CONNECTOR

CHECK USB POWER SOURCE

FORMAT USB DEVICE OR RESTORE "iPod" AND RECHECK

REPLACE USB DEVICE OR "iPod"

CHECK USB DEVICE OR "iPod"

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1. When a large amount of data is in a USB device, it may take a while before play begins.
   
2. When using a USB device, files that are copy protected or encrypted due to copyright reasons cannot be played.
   
3. When files are not played in the sorted order, perform the following procedure before inspection.
   
1. Add numbers in front of the file names.
   
2. Put the files in a folder and copy the folder data to the USB device.
   

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 (COROLLA_ZRE142 RM000000NKZ0DOX.html).

   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

1. Disconnect the E121 radio receiver assembly connector.
   

2. Disconnect the E120 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
   E121-1 (USV1) - E120-1 (UPI)	Always	Below 1 Ω
   E121-2 (US1-) - E120-2 (UDO-)	Always	Below 1 Ω
   E121-3 (US1+) - E120-3 (UDO+)	Always	Below 1 Ω
   E121-4 (UGD1) - E120-4 (UJSG)	Always	Below 1 Ω
   E121-5 (USG1) - E120-5 (UJSS)	Always	Below 1 Ω
   E121-1 (USV1) - Body ground	Always	10 kΩ or higher
   E121-2 (US1-) - Body ground	Always	10 kΩ or higher
   E121-3 (US1+) - Body ground	Always	10 kΩ or higher
   E121-4 (UGD1) - Body ground	Always	10 kΩ or higher
   E121-5 (USG1) - Body ground	Always	10 kΩ or higher

1. Reconnect the radio receiver assembly connector.
   

2. Disconnect the E120 No. 1 stereo jack adapter assembly connector.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   E120-1 (UPI) - E120-4 (UJSG)	Ignition switch ACC	5 V

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.
   

   NOTICE:

   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.
   

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:

   1. 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.
      
   2. Refer to System Description for compatible formats and versions (COROLLA_ZRE142 RM000000NKZ0DOX.html).
      

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.