Lexus ES manuals

Lexus ES: Visual Mute Signal Circuit between Radio Receiver and Multi-display

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System (for Gasoline Model) / Visual Mute Signal Circuit between Radio Receiver and Multi-display

DESCRIPTION

The radio receiver assembly sends a visual mute signal to the multi-display assembly. As a result, a black screen is displayed when the screen changes so that noise and distorted images are not displayed.

When an open exists in the circuit, noise and distorted images will be displayed instead of a black screen.

When a short exists in the circuit, even though the multi-display assembly is operating normally, noise and distorted images will be displayed (black screen will not be displayed) during screen changes or the black screen will always be displayed.

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

PROCEDURE

1.

INSPECT MULTI-DISPLAY ASSEMBLY

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G22-11 (VMTI) - Body ground

Engine switch on (ACC)

Screen display changing

3.5 V or higher

→ Below 1 V

→ 3.5 V or higher

*a

Component with harness connected

(Multi-display Assembly)
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - MULTI-DISPLAY ASSEMBLY)

(a) Disconnect the G22 multi-display assembly connector.

(b) Disconnect the G3 radio receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G3-1 (VMTF) - G22-11 (VMTI)

Always

Below 1 Ω

G3-1 (VMTF) or G22-11 (VMTI) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

REPLACE MULTI-DISPLAY ASSEMBLY

(a) Replace the multi-display assembly with a new or known good one.

Click here

(b) Check that the screen display is normal.

OK:

Screen display is normal.

OK

END
NG

REPLACE RADIO RECEIVER ASSEMBLY

READ NEXT:

 Voice Guidance does not Function

WIRING DIAGRAM PROCEDURE 1. CHECK VOICE GUIDANCE SETTING (a) Check that the voice guidance settings are not off. OK: Voice guidance settings are not off. NG CHANGE VOICE GUIDANCE SETT

 Voice is not Recognized

PROCEDURE 1. CHECK CONDITION (a) While paying attention to the condition of the spoken voice command, perform a voice recognition operation. OK: Voice command is recognized normally. HINT:

 Weather and traffic information cannot be obtained

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 Pre

SEE MORE:

 Sound of Portable Player cannot be Heard from Speakers or Sound is Low

PROCEDURE 1. CHECK PORTABLE PLAYER SETTINGS (a) Check the portable player settings. (1) Check that the volume is not set to "0". (2) Check that mute is off. (b) Check that the sound of the portable player can be heard from the speakers. OK: Sound of the portable player can be heard from th

 Problem Symptoms Table

PROBLEM SYMPTOMS TABLE NOTICE: If the battery voltage is low, the mirror heater function may not operate. HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in t

© 2016-2025 Copyright www.lexguide.net