Visual Mute Signal Circuit Between Navigation ECU and Multi-Display

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for DVD): Visual Mute Signal Circuit between Navigation ECU and Multi-display
- Visual Mute Signal Circuit between Navigation ECU and Multi-display

DESCRIPTION

The display and navigation module display sends a visual mute signal to the multi-display. As a result, a black screen is inserted 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 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





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT MULTI-MEDIA MODULE WIRE

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





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the H20 multi-media module wire connector.

(b) Disconnect the H61 display and navigation module display connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. REPLACE MULTI-MEDIA MODULE WIRE

(a) Replace the multi-media module wire and check if the navigation system operates normally Disassembly.

OK:

The navigation system operates normally.

NG -- REPLACE MULTI-DISPLAY

OK -- END

4. REPLACE MULTI-DISPLAY

(a) Replace the multi-display and check if the navigation system operates normally Disassembly.

OK:

The navigation system operates normally.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- END