REAR VIEW MONITOR SYSTEM Display Signal Circuit between Radio and Display Assembly and Television Camera Assembly

DESCRIPTION

The display signal from the rear television camera assembly transmits to the radio and display receiver assembly.

WIRING DIAGRAM

A01J5SDE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)


    1. Disconnect the R20 radio and display receiver assembly connector.

    2. Disconnect the T39 rear television camera assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R20-7 (CA+) - T39-4 (CB+) Always Below 1 Ω
      R20-8 (V+) - T39-2 (CV+) Always Below 1 Ω
      R20-15 (CGND) - T39-3 (CGND) Always Below 1 Ω
      R20-16 (V-) - T39-1 (CV-) Always Below 1 Ω
      R20-7 (CA+) - Body ground Always 10 kΩ or higher
      R20-8 (V+) - Body ground Always 10 kΩ or higher
      R20-15 (CGND) - Body ground Always 10 kΩ or higher
      R20-16 (V-) - Body ground Always 10 kΩ or higher

    NG
    OK
  2. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A01J3HWE03
      Text in Illustration
      *a

      Component without harness connected

      (Radio and Display Receiver Assembly)

      Disconnect the R20 radio and display receiver assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R20-16 (V-) - Body ground Always Below 1 Ω
      R20-15 (CGND) - Body ground Always Below 1 Ω

    NG
    OK
  3. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. A01J6ZOE10
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Rear Television Camera Assembly)

      Disconnect the T39 rear television camera assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      T39-4 (CB+) - T39-3 (CGND) Ignition switch ON, shift lever in R 5.5 to 7.05 V

    NG
    OK
  4. CHECK REAR TELEVISION CAMERA ASSEMBLY


    1. Using an oscilloscope, check the waveform.

      A01J6PGE03

      Tech Tips

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly with the connector connected.

      Text in Illustration
      *a

      Component with harness connected

      (Radio and Display Receiver Assembly)

      *b Waveform 1
      *c Waveform 2 *d Synchronized Signal
      *e Video Waveform - -
      Measurement Condition
      Item Content
      Terminal No. (Symbol) R20-8 (V+) - R20-16 (V-)
      Tool Setting 0.2 V/DIV., 50 μs/DIV.
      Condition
      • Waveform 1: Ignition switch ON, shift lever in R

      • Waveform 2: Ignition switch ON, shift lever in R, screen blacked out by covering camera lens

      OK
      Waveform is as shown in the illustration.

      Tech Tips

      The video waveform changes according to the image sent by the rear television camera assembly.


    NG
    OK