Visual Mute Signal Circuit Between Navigation ECU and Multi-display

NAVIGATION: NAVIGATION SYSTEM (for HDD): 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 assembly. 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 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.

SYSTEM DESCRIPTION





INSEPCTION PROCEDURE

PROCEDURE

1. INSPECT MULTI-DISPLAY ASSEMBLY

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





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - DISPLAY AND NAVIGATION MODULE DISPLAY)

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

2. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - DISPLAY AND NAVIGATION MODULE DISPLAY)

(a) Disconnect the M9 multi-display assembly connector.

(b) Disconnect the D25 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-DISPLAY ASSEMBLY

(a) Replace the multi-display assembly and check if it operates normally Removal.

OK:

The navigation system operates normally.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- END