Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: USB Audio System Recognition/Play Error

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System (for 12.3 Inch Display) / USB Audio System Recognition/Play Error

DESCRIPTION

When a USB device or "iPod" is connected to the USB jack of the No. 1 stereo jack adapter assembly, it must have playable files. The device must also communicate with and be recognized by the radio receiver assembly. This diagnostic procedure is for when a device is not recognized, or files from the device cannot be played normally.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here

HINT:

  • When a large amount of data is in a USB device, it may take a while to begin playback.
  • When using a USB device, files that are protected by copyright cannot be played.
  • 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.

PROCEDURE

1.

CHECK USB DEVICE OR "iPod"

(a) Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly.

(b) Check if playable files are present on the USB device or "iPod".

HINT:

Refer to System Description for playable files.

Click here

(c) 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.

Click here

Result

Proceed to

No playable files exist, or incompatible device format or version.

A

Playable files exist, and compatible device format or version.

B
A

USB DEVICE FORMAT WAS INCOMPATIBLE, "iPod" VERSION WAS INCOMPATIBLE, OR NO PLAYABLE FILES PRESENTED
B

2.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)

(a) Disconnect the J169 radio receiver assembly connector.

(b) Disconnect the J170 No. 1 stereo jack adapter assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J170-1 (UPI) - J169-1 (USV1)

Always

Below 1 Ω

J170-2 (UDO-) - J169-2 (US1-)

Always

Below 1 Ω

J170-3 (UDO+) - J169-3 (US1+)

Always

Below 1 Ω

J170-4 (UJSG) - J169-4 (UGD1)

Always

Below 1 Ω

J170-5 (UJSS) - J169-5 (USG1)

Always

Below 1 Ω

J170-1 (UPI) or J169-1 (USV1) - Body ground

Always

10 kΩ or higher

J170-2 (UDO-) or J169-2 (US1-) - Body ground

Always

10 kΩ or higher

J170-3 (UDO+) or J169-3 (US1+) - Body ground

Always

10 kΩ or higher

J170-4 (UJSG) or J169-4 (UGD1) - Body ground

Always

10 kΩ or higher

J170-5 (UJSS) or J169-5 (USG1) - Body ground

Always

10 kΩ or higher

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

*b

Front view of wire harness connector

(to No. 1 Stereo Jack Adapter Assembly)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NO. 1 STEREO JACK ADAPTER ASSEMBLY)

(a) Disconnect the J148 radio receiver assembly connector.

(b) Disconnect the J152 No. 1 stereo jack adapter assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J148-3 (+B) - J152-4 (+B)

Always

Below 1 Ω

J148-16 (ACC) - J152-8 (ACC)

Always

Below 1 Ω

J148-2 (GND2) - J152-3 (GND)

Always

Below 1 Ω

J148-3 (+B) or J152-4 (+B) - Body ground

Always

10 kΩ or higher

J148-16 (ACC) or J152-8 (ACC) - Body ground

Always

10 kΩ or higher

J148-2 (GND2) or J152-3 (GND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT RADIO RECEIVER ASSEMBLY (NO. 1 STEREO JACK ADAPTER ASSEMBLY POWER SOURCE)

(a) Reconnect the J169 and J148 radio receiver assembly connectors.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J170-1 (UPI) - J170-4 (UJSG)

Engine switch on (ACC)

4.5 to 5.5 V

J152-8 (ACC) - J152-3 (GND)

Engine switch on (ACC)

11 to 14 V

J152-4 (+B) - J152-3 (GND)

Always

11 to 14 V

*a

Front view of wire harness connector

(to No. 1 Stereo Jack Adapter Assembly)
NG

REPLACE RADIO RECEIVER ASSEMBLY

OK

5.

FORMAT USB DEVICE OR RESTORE "iPod" AND RECHECK

(a) Delete all files in the USB device or "iPod" and format/restore it.

(b) 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.

HINT:

Make sure to obtain the customer's permission to perform this procedure.

OK:

Malfunction disappears.

OK

END
NG

6.

REPLACE USB DEVICE OR "iPod"

(a) Turn the engine switch off.

HINT:

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

(b) Turn the engine switch on (ACC).

(c) 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.

    Click here

NEXT

7.

CHECK USB DEVICE OR "iPod"

(a) 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.

OK

USB DEVICE OR "iPod" WAS INCOMPATIBLE OR DEFECTIVE
NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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