Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Park Assist Monitoring. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK NAVIGATION DISPLAY

CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - TELEVISION CAMERA ASSEMBLY)

INSPECT TELEVISION CAMERA ECU

INSPECT TELEVISION CAMERA ASSEMBLY

PARKING ASSIST MONITOR SYSTEM - Display Signal Circuit between Television Camera ECU and Television Camera Assembly


DESCRIPTION

This is the display signal circuit of the television camera assembly.

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly


INSPECTION PROCEDURE

1.CHECK NAVIGATION DISPLAY

  1. Check whether the navigation display appears properly or not.

    OK:
    The navigation display properly appears.
    HINT:
    1. When the navigation display has trouble, inspect the circuit between the television camera ECU and multi-display (Click here).
    2. When the navigation display is normal, inspect the circuit between the television camera ECU and television camera assembly by following the steps below.


NG
GO TO NAVIGATION SYSTEM
OK


2.CHECK HARNESS AND CONNECTOR (TELEVISION CAMERA ECU - TELEVISION CAMERA ASSEMBLY)

  1. Disconnect the J92 connector from the television camera ECU.



  1. Disconnect the Q43 connector from the television camera assembly.


    Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly

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

    Standard resistance:

    Tester connection
    (Terminal No.)
    		Condition
    		Specified condition
    CB+ (J92-40) - CB+ (Q43-4)
    		Always
    		Below 1 Ω
    CGND (J92-39) - CGND (Q43-3)
    		Always
    		Below 1 Ω
    CV+ (J92-20) - CV+ (Q43-2)
    		Always
    		Below 1 Ω
    CV- (J92-19) - CV- (Q43-1)
    		Always
    		Below 1 Ω
    CB+ (J92-40) - Body ground
    		Always
    		10 kΩ or higher
    CGND (J92-39) - Body ground
    		Always
    		10 kΩ or higher
    CV+ (J92-20) - Body ground
    		Always
    		10 kΩ or higher
    CV- (J92-19) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT TELEVISION CAMERA ECU


  1. Reconnect the J92 connector to the television camera ECU.


    Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly

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

    Standard voltage:

    Tester connection
    (Terminal No.)
    		Condition
    		Specified condition
    CB+ (Q43-4) - CGND (Q43-3)
    		Engine SW on (IG), shift lever reverse position
    		Approx. 6 V


NG
REPLACE TELEVISION CAMERA ECU
OK


4.INSPECT TELEVISION CAMERA ASSEMBLY


  1. Reconnect the Q43 connector to the television camera assembly.


    Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly



    Lexus Is250, Is220D. Gse20 Ale20.Park Assist Monitoring.Clearance Sonar System.Parking Assist Monitor System Display Signal Circuit Between Television Camera Ecu And Television Camera Assembly

  1. Check the waveform of the television camera assembly using an oscilloscope.

    1. Measurement terminal: CV+ - CV-
      Measurement setting: 0.2 V/DIV, 0.2 μs/DIV.
      Condition : Engine SW on (IG), shift lever in R position

      OK:
      Pulses as shown in the illustration.


NG
REPLACE TELEVISION CAMERA ASSEMBLY
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE