Rear View Monitor System (For Radio And Display Type) Terminals Of Ecu

  1. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

Rear View Monitor System (For Radio And Display Type) -- Terminals Of Ecu



CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

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  1. Disconnect the H49 and H51 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
    H49-3 (ACC1) - H49-7 (GND1)
    		GR - BR
    		Power source (ACC)
    		Ignition switch off
    		Below 1 V
    Ignition switch on ACC
    		11 to 14 V
    H49-4 (+B1) - H49-7 (GND1)
    		R - BR
    		Power source (+B)
    		Always
    		11 to 14 V
    H49-7 (GND1) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    H51-1 (IG) - H49-7 (GND1)
    		L - BR
    		Power source (IG)
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		11 to 14 V

  3. Reconnect the H49 and H51 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
    H51-2 (REV) - H49-7 (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
    H50-11 (CA+) - H50-23 (CGND)
    		B - Shielded
    		Power source
    		Ignition switch ON
    		5.5 to 7.05 V
    H50-12 (V+) - H50-23 (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)
    H50-23 (CGND) - Body ground
    		Shielded - Body ground
    		Shielded ground
    		Always
    		Below 1 V


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  5. Using an oscilloscope, check the waveform.

    1. Waveform 1

      Measurement Condition
      Item
      		Content
      Terminal No. (Symbol)
      		H50-12 (V+) - H50-23 (CGND)
      Tool Setting
      		200 mV/DIV., 50 μs/DIV.
      Condition
      		Ignition switch ON, camera lens not covered, displaying an image
      HINT:
      The video waveform changes according to the image sent by the rear television camera assembly.

    2. Waveform 2

      Measurement Condition
      Item
      		Content
      Terminal No. (Symbol)
      		H50-12 (V+) - H50-23 (CGND)
      Tool Setting
      		200 mV/DIV., 50 μs/DIV.
      Condition
      		Ignition switch ON, camera lens covered, blacking out screen
      HINT:
      The video waveform changes according to the image sent by the rear television camera assembly.
      Text in Illustration
      *a
      		Waveform 1
      *b
      		Waveform 2
      *c
      		Synchronized Signal
      *d
      		Video Waveform