REAR VIEW MONITOR SYSTEM TERMINALS OF ECU

  1. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

    U123438E02

    1. Disconnect the H105 and H107 radio and display receiver assembly connectors.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specification

      H105-1 (IG) - H107-7 (GND1)

      L - BR

      Power source (IG)

      Ignition switch off

      Below 1 V

      Ignition switch ON

      11 to 14 V

      H107-3 (ACC1) - H107-7 (GND1)

      GR - BR

      Power source (ACC)

      Ignition switch off

      Below 1 V

      Ignition switch ACC

      11 to 14 V

      H107-4 (+B1) - H107-7 (GND1)

      SB - BR

      Power source (+B)

      Always

      11 to 14 V

      H107-7 (GND1) - Body ground

      BR - Body ground

      Ground

      Always

      Below 1 Ω

    3. Reconnect the H105 and H107 radio and display receiver assembly connectors.

    4. Measure the voltage and waveform according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specification

      H105-2 (REV) - H107-7 (GND1)

      R - BR

      Reverse signal

      Ignition switch ON, shift lever in R

      7.5 to 14 V

      Ignition switch ON, shift lever not in R

      Below 1 V

      H123-11 (CA+) - H123-23 (CGND)

      B - Shielded

      Power source

      Ignition switch ON

      5.5 to 7.05 V

      H123-12 (V+) - H123-23 (CGND)

      R - Shielded

      Display signal

      Ignition switch ON, camera lens not covered, displaying an image

      Pulse generation (See waveform 1)

      Ignition switch ON, camera lens covered, blacking out screen

      Pulse generation (See waveform 2)

      H123-23 (CGND) - Body ground

      Shielded - Body ground

      Shielded ground

      Always

      Below 1 V

    5. Using an oscilloscope, check the waveform.

      E354076E01

      1. Waveform 1

        Table 1. Measurement Condition

        Item

        Content

        Terminal No. (Symbol)

        H123-12 (V+) - H123-23 (CGND)

        Tool Setting

        200 mV/DIV., 50 μs/DIV.

        Condition

        Ignition switch ON, camera lens not covered, displaying an image
        Tip:

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

      2. Waveform 2

        Table 2. Measurement Condition

        Item

        Content

        Terminal No. (Symbol)

        H123-12 (V+) - H123-23 (CGND)

        Tool Setting

        200 mV/DIV., 50 μs/DIV.

        Condition

        Ignition switch ON, camera lens covered, blacking out screen
        Tip:

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

        Table 3. Text in Illustration

        *a

        Waveform 1

        *b

        Waveform 2

        *c

        Synchronized Signal

        *d

        Video Waveform