Display Signal Circuit Between Navigation ECU and Video Terminal

AUDIO / VISUAL: REAR SEAT ENTERTAINMENT SYSTEM: Display Signal Circuit between Navigation ECU and Video Terminal
- Display Signal Circuit between Navigation ECU and Video Terminal

DESCRIPTION

This is the display signal from the video terminal to the display and navigation module display.

WIRING DIAGRAM













INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - VIDEO TERMINAL)

(a) w/o Disc Player:

(1) Disconnect the L118 display and navigation module display connector.

(2) Disconnect the L78 video (video adapter) terminal connector.

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

Standard Resistance:





(b) for Roof with Disc Player:

(1) Disconnect the L118 display and navigation module display connector.

(2) Disconnect the Y3 video (video adapter) terminal connector.

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

Standard Resistance:





(c) for Console Box with Disc Player:

(1) Disconnect the L118 display and navigation module display connector.

(2) Disconnect the U2 video (video adapter) terminal connector.

(3) 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.

2. CHECK VIDEO (VIDEO ADAPTER) TERMINAL

(a) w/o Disc Player:

(1) Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.





OK:





Text in Illustration





(b) for Roof with Disc Player:

(1) Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.





OK:





Text in Illustration





(c) for Console Box with Disc Player:

(1) Using an oscilloscope, check the waveform between each terminal and the body ground according to the conditions as shown in the table below.





OK:





Text in Illustration





Result





B -- REPLACE VIDEO (VIDEO ADAPTER) TERMINAL Removal

C -- REPLACE POWER OUTLET SOCKET (VIDEO [VIDEO ADAPTER] TERMINAL) Removal

D -- REPLACE CONSOLE BOX PLATE (VIDEO [VIDEO ADAPTER] TERMINAL) Removal

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