Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: 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 Navigation 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

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

B

2.

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

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

10 kΩ or higher

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

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 J169 radio receiver assembly connector.

*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)

(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

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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

(a) Disconnect the J170 and J152 No. 1 stereo jack adapter assembly connectors.

*a

Front view of wire harness connector

(to No. 1 Stereo Jack Adapter Assembly)

(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

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

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