Sound Signal Circuit Between Multi-Media Interface ECU and Video Terminal

AUDIO / VISUAL: REAR SEAT ENTERTAINMENT SYSTEM: Sound Signal Circuit between Multi-media Interface ECU and Video Terminal
- Sound Signal Circuit between Multi-media Interface ECU and Video Terminal

DESCRIPTION

This is the sound signal circuit from the video terminal to the multi-media interface ECU.

WIRING DIAGRAM













INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MULTI-MEDIA INTERFACE ECU - VIDEO TERMINAL)

(a) w/o Disc Player:

(1) Disconnect the R66 multi-media interface ECU 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 R66 multi-media interface ECU 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 R66 multi-media interface ECU 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





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

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

B -- REPLACE VIDEO (VIDEO ADAPTER) TERMINAL Removal

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