Display Signal Circuit between Multi-display Controller and Television Camera ECU: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Signal Circuit Between Multi-Display Controller And Television Camera ECU - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Disconnect the multi-display controller connector R15 and television camera ECU connector T16.

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

Resistance

ECU CONNECTOR TERMINAL RESISTANCE SPECIFICATION

Tester connection	Condition	Specified condition
R1 - R1	Always	Below 1 Ω
G1 - G1	Always	Below 1 Ω
B1 - B1	Always	Below 1 Ω
SYNC1 - SYN1	Always	Below 1 Ω
VR1 - VR1	Always	Below 1 Ω
R1 - Body ground	Always	10 kΩ or higher
G1 - Body ground	Always	10 kΩ or higher
B1 - Body ground	Always	10 kΩ or higher
SYNC1 - Body ground	Always	10 kΩ or higher
VR1 - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying Multi-Display Controller Connector R15 And Television Camera ECU Connector T16

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP.

INSPECT MULTI-DISPLAY CONTROLLER (OUTPUT SIGNAL)

Reconnect the multi-display controller connector R15.

Measure the waveform according to the table below.

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
R1 - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
G1 - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
B1 - Body ground	Navigation map is switched	A waveform synchronized with display signals is output
SYN1 - Body ground	Navigation display is ON	A waveform synchronized with display signals is output

Fig 3: Identifying Television Camera ECU Connector T16

HINT:

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

Oscilloscope waveform
1. Terminal: SYNC - Body ground
  Setting: 500 mV/DIV 10 [mue] s/DIV
  
  Condition: Navigation display is ON.
2. Terminal: R, G, B - Body ground
  Setting: 200 mV/DIV 10 [mue] s/DIV
  
  Condition: Navigation map is switched.

NG: REPLACE MULTI-DISPLAY CONTROLLER

Fig 4: Identifying Oscilloscope Waveform

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