Toyota Avalon (XX50): Touch Panel Switch does not Function. USB Audio System Recognition/Play Error. Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter

Touch Panel Switch does not Function

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

• When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
  • A communication malfunction DTC may be stored.
  • The radio and display receiver assembly may not operate normally.

PROCEDURE

(a) Check if there is any foreign matter caught between the display and exterior frame of the multi-display.

OK:

No foreign matter is caught between the display and exterior frame of the multi-display.

HINT:

• If there is foreign matter between the display and exterior frame of the multi-display, the touch panel will remain pressed, preventing touch switch operation.
• Turn the engine switch on (ACC) or on (IG) with your hand touching the operating section, non-response may occur.

NG

REMOVE FOREIGN MATTER

OK

(a) Check for foreign matter on the display.

OK:

The display is clean.

NG

CLEAN DISPLAY AND RECHECK TOUCH PANEL

OK

(a) Enter the "Touch Switch Check" screen. Refer to Check Touch Switch in Operation Check. Click here

(b) Touch the display in the area where the switch malfunction occurs.

OK:

A "+" mark appears at the touched position.

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

USB Audio System Recognition/Play Error

DESCRIPTION

When a USB device or "iPod" is connected to the USB jack of the stereo jack adapter assembly, it must have playable files. The device must also communicate with and be recognized by the radio and display 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

• When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
  • A communication malfunction DTC may be stored.
  • The radio and display receiver assembly may not operate normally.

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

(a) Disconnect the USB device or "iPod" from the 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

A

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

B

(a) Disconnect the G106 radio and display receiver assembly connector.

(b) Disconnect the G5 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 G106-1 (USV1) - G5-8 (UPI) Always Below 1 Ω G106-2 (US1-) - G5-9 (UDO-) Always Below 1 Ω G106-3 (US1+) - G5-10 (UDO+) Always Below 1 Ω G106-4 (UGD1) - G5-11 (UJSG) Always Below 1 Ω G106-5 (USG1) - G5-12 (UJSS) Always Below 1 Ω G106-1 (USV1) or G5-8 (UPI) - Body ground Always 10 kΩ or higher G106-2 (US1-) or G5-9 (UDO-) - Body ground Always 10 kΩ or higher G106-3 (US1+) or G5-10 (UDO+) - Body ground Always 10 kΩ or higher G106-4 (UGD1) or G5-11 (UJSG) - Body ground Always 10 kΩ or higher G106-5 (USG1) or G5-12 (UJSS) - Body ground Always 10 kΩ or higher

*a Front view of wire harness connector (to Radio and Display Receiver Assembly) *b Front view of wire harness connector (to Stereo Jack Adapter Assembly)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Disconnect the G5 stereo jack adapter assembly connector.

(b) Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Connection Condition Specified Condition G5-8 (UPI) - G5-11 (UJSG) Engine switch on (ACC) 5 V

*a Front view of wire harness connector (to Stereo Jack Adapter Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

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

OK:

Malfunction disappears.

OK

END

NG

(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 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

(a) Check if a USB device or "iPod" is recognized by the radio and display 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

Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter

DESCRIPTION

The navigation ECU receives a vehicle speed signal from the combination meter assembly.

HINT:

• A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls its respective systems based on this pulse signal.
• If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the following diagram will not operate normally.

WIRING DIAGRAM

PROCEDURE

(a) Check the output waveform. (1) Remove the combination meter assembly with the connector(s) still connected. (2) Connect an oscilloscope to terminal G16-6 (+S) and body ground. (3) Turn the engine switch on (IG). (4) Turn a wheel slowly. (5) Check the signal waveform according to the condition(s) in the table below. Item Condition Measurement terminal G16-6 (+S) - Body ground Tool setting 5 V/DIV., 20 ms./DIV. Vehicle condition Wheel being rotated OK: The waveform is similar to that shown in the illustration. HINT: When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

*a Component with harness connected (Combination Meter Assembly)

NG

GO TO METER / GAUGE SYSTEM

OK

(a) Disconnect the G13 navigation ECU connector.

(b) Disconnect the G16 combination meter assembly connector.

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

Standard Resistance:

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR