USB Audio System Recognition/Play Error [12/2022 - ]: Procedure

1. Disconnect the USB storage device or "iPod" from the No. 1 stereo jack adapter assembly.
2. Check that playable files exist in the USB storage device or "iPod".
3. Check that the USB storage device or "iPod" being used by the customer is a compatible version and format.

   Result

   Result	Proceed to
   The format of the USB storage device is compatible The version of the "iPod" is compatible	A
   Playable files do not exist The format of the USB storage device is not compatible The version of the "iPod" is not compatible	B

Result: 

B 

END 

Result: 

A 

See step  2

1. Disconnect the K82 radio and display receiver assembly connector.
2. Disconnect the K134 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
   K82-1 (USV1) - K134-3 (VBUS)	Always	Below 1 Ω
   K82-2 (US1-) - K134-4 (D-)	Always	Below 1 Ω
   K82-3 (US1+) - K134-1 (D+)	Always	Below 1 Ω
   K82-4 (UGD1) - K134-2 (VGND)	Always	Below 1 Ω
   K82-5 (USG1) - K134-5 (UJSS)	Always	Below 1 Ω
   K82-1 (USV1) or K134-3 (VBUS) - Body ground	Always	10 kΩ or higher
   K82-2 (US1-) or K134-4 (D-) - Body ground	Always	10 kΩ or higher
   K82-3 (US1+) or K134-1 (D+) - Body ground	Always	10 kΩ or higher
   K82-4 (UGD1) or K134-2 (VGND) - Body ground	Always	10 kΩ or higher
   K82-5 (USG1) or K134-5 (UJSS) - Body ground	Always	10 kΩ or higher

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *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)

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the K134 No. 1 stereo jack adapter assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   K134-3 (VBUS) - K134-2 (VGND)	Ignition switch ON	4.5 to 5.5 V
   K134-6 (+B) - K134-8 (GND)	Always	11 to 14 V

   HINT: 

   Measure the voltage with the radio and display receiver assembly connectors connected.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

Result: 

OK 

See step  4

1. Format the USB storage device or initialize the "iPod" to delete the audio files.
   NOTE:

   When formatting the USB storage device or initializing the "iPod", all audio files stored in the device will be deleted. Make sure to back up the audio files before performing this procedure.

2. Restore the data and check if the problem can be reproduced.

   Result

   Result	Proceed to
   Malfunction disappears	A
   Malfunction occurs.	B

Result: 

A 

END 

Result: 

B 

See step  5

1. Disconnect the USB storage device or "iPod" from the No. 1 stereo jack adapter assembly.
2. Turn the ignition switch from off to ON

   HINT: 

   If another USB storage device or "iPod" is to be connected, it is necessary to turn the ignition switch off in order for the device to be detected.

3. Connect a known good USB storage device or "iPod" to the No. 1 stereo jack adapter assembly.

   HINT: 

   • When a USB storage device is used, replace it with another device and perform the inspection.
   • When an "iPod" is used, replace it with another device and perform the inspection.
4. Perform the operation again and check if the problem symptom recurs.

   Result

   Result	Proceed to
   Malfunction disappears	A
   Malfunction occurs	B

Result: 

A 

END 

Result: 

B 

See step  6

1. Replace the No. 1 stereo jack adapter assembly with a new or known good one.

   Refer to REMOVAL [12/2022 - ]

2. Check if the problem symptom recurs.

   Result

   Result	Proceed to
   Malfunction disappears	A
   Malfunction occurs	B

Result: 

A 

END (NO. 1 STEREO JACK ADAPTER ASSEMBLY MALFUNCTION) 

Result: 

B 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY. Refer to  REMOVAL [12/2022 - ]