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 Hv 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

Power 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:

 Removal

REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during steering column assembly removal/installation are shown below. Necessary Procedures After Parts Removed/

 Terminals Of Ecu

TERMINALS OF ECU Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G128-1 (+B) - G128-20 (E) BR - W-B Power source (+B) Power switch off 11 to 14 V G128-3 (SIG-) - G128-20 (E) B - W-B Ground Always Below 1 V G128-4 (IND1) -

© 2016-2024 Copyright www.lexguide.net