Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Park Assist Monitoring. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT MULTI-DISPLAY (R, G, B, VR, VG, SYNC TERMINAL)

CHECK WIRE HARNESS (TELEVISION CAMERA ECU - TELEVISION CAMERA)

CHECK TELEVISION CAMERA (POWER SOURCE VOLTAGE)

REAR VIEW MONITOR SYSTEM - Display Signal Circuit (Television Camera Assembly - Television Camera ECU)


DESCRIPTION

This is the display signal circuit of the television camera.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)


INSPECTION PROCEDURE

1.INSPECT MULTI-DISPLAY (R, G, B, VR, VG, SYNC TERMINAL)
Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L47-20 (VR) - L46-10 (GND1)
    		Always
    		Below 1 Ω
    L47-15 (VG) - L46-10 (GND1)
    		Always
    		Below 1 Ω


    Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)

  1. Check the waveform of the multi-display using an oscilloscope.

    Standard voltage:
    R, G, B signal waveform
    Tester Connection
    		Condition
    		Specified Condition
    L47-19 (R) - L46-10 (GND1)
    		Image is displayed
    (Rear view monitor system)
    		Pulse generation
    L47-18 (G) - L46-10 (GND1)
    L47-17 (B) - L46-10 (GND1)
    SYNC signal waveform
    Tester Connection
    		Condition
    		Specified Condition
    L47-16 (SYNC) - L46-10 (GND1)
    		Image is displayed
    (Rear view monitor system)
    		Pulse generation
HINT:
When trouble occurs in the multi-display, inspect the display signal circuit between the television camera ECU and multi-display (Click here).


NG
INSPECT DISPLAY SIGNAL CIRCUIT (TELEVISION CAMERA ECU - MULTI-DISPLAY)
OK


2.CHECK WIRE HARNESS (TELEVISION CAMERA ECU - TELEVISION CAMERA)
Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)

  1. Disconnect the L64 ECU connector.

  1. Disconnect the a8 camera connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L64-20 (CB+) - a8-4 (CB+)
    		Always
    		Below 1 Ω
    L64-19 (CGND) - a8-3 (CGND)
    		Always
    		Below 1 Ω
    L64-40 (CV+) - a8-2 (CV+)
    		Always
    		Below 1 Ω
    L64-39 (CV-) - a8-1 (CV-)
    		Always
    		Below 1 Ω
    L64-20 (CB+) - Body ground
    		Always
    		10 kΩ or higher
    L64-19 (CGND) - Body ground
    		Always
    		10 kΩ or higher
    L64-39 (CV+) - Body ground
    		Always
    		10 kΩ or higher
    L64-39 (CV-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK TELEVISION CAMERA (POWER SOURCE VOLTAGE)
Lexus Gs430, Gs300. Uzs190 Grs190.Park Assist Monitoring.Clearance Sonar System.Rear View Monitor System Display Signal Circuit (Television Camera Assembly - Television Camera Ecu)

  1. Measure the voltage of the connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    a8-4 (CB+) - a8-3 (CGND)
    		Engine switch on (IG), shift lever in R position
    		Approx. 6 V


NG
REPLACE TELEVISION CAMERA ECU
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE