Display Signal Circuit between Television Camera ECU and Multi-display

DESCRIPTION

This is the display signal circuit from the television camera ECU to the multi-display.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - MULTI-DISPLAY)

1. Disconnect the television camera ECU connector T15 and multi-display connector M4.

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

   Resistance:

   Tester connection	Condition	Specified condition
   R - R	Always	Below 1 Ω
   G - G	Always	Below 1 Ω
   B - B	Always	Below 1 Ω
   SYNC - SYNC	Always	Below 1 Ω
   VR - VR	Always	Below 1 Ω
   R - Body ground	Always	10 kΩ or higher
   G - Body ground	Always	10 kΩ or higher
   B - Body ground	Always	10 kΩ or higher
   SYNC - Body ground	Always	10 kΩ or higher
   VR - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. INSPECT TELEVISION CAMERA ECU (OUTPUT SIGNAL)

1. Reconnect the television camera ECU connector T15.

2. Measure the waveform according to the table below.

   OK:

   Tester connection	Condition	Specified condition
   R - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
   G - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
   B - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
   SYNC - Body ground	Navigation display is ON	A waveform synchronized with display signals is output

   HINT:

   The waveform pattern may differ from those shown in the illustrations below due to differences in oscilloscope setting. A normal television camera ECU operating condition can be determined if any waveform is output.

3. Oscilloscope wave

   1. Terminal: SYNC - Body groundSetting: 500 mV/DIV 10 μs/DIVCondition: Navigation display is ON.

   2. Terminal: R, G, B - Body groundSetting: 200 mV/DIV 10 μs/DIVCondition: Navigation map is switched.

NG	REPLACE TELEVISION CAMERA ECU

OK
RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL