Display Signal Circuit Between Navigation ECU and Television Display

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

DESCRIPTION

This circuit sends a display signal from the television display assembly to the display and navigation module display.

WIRING DIAGRAM









INSPECTION PROCEDURE

PROCEDURE

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

(a) for Roof:

(1) Disconnect the L114 display and navigation module display connector.

(2) Disconnect the R59 television display assembly connector.

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

Standard Resistance:





(b) for Console Box:

(1) Disconnect the L114 display and navigation module display connector.

(2) Disconnect the R62 television display assembly 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 TELEVISION DISPLAY ASSEMBLY (NTSC SIGNAL)

(a) for Roof:

(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 Console Box:

(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





C -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

B -- REPLACE TELEVISION DISPLAY ASSEMBLY Removal

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