Rear View Monitor System Terminals Of Ecu

  1. CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

Rear View Monitor System -- Terminals Of Ecu



CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Park Assist Monitoring.Rear View Monitor System.Rear View Monitor System Terminals Of Ecu

  1. Disconnect the R19 and R25 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
    		Specified Condition
    R19-1 (IG) - R25-7 (GND)
    		P - BR
    		IG signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		11 to 14 V
    R25-3 (ACC) - R25-7 (GND)
    		GR - BR
    		Accessory (On)
    		Ignition switch off
    		Below 1 V
    Ignition switch ACC
    		11 to 14 V
    R25-4 (B) - R25-7 (GND)
    		L-Y - BR
    		Battery
    		Always
    		11 to 14 V
    R25-7 (GND) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the R19 and R25 radio and display receiver assembly connectors.

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

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    R19-2 (REV) - R25-7 (GND)
    		R-Y - 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
    R20-7 (CA+) - R20-15 (CGND)
    		B - Shielded
    		Power source
    		Ignition switch ON, shift lever in R
    		5.5 to 7.05 V
    R20-8 (V+) - R20-16 (V-)
    		W - R
    		Display signal
    		Ignition switch ON, shift lever in R
    		Pulse generation
    (See waveform 1)
    Ignition switch ON, shift lever in R, screen blacked out by covering camera lens
    		Pulse generation
    (See waveform 2)
    R20-15 (CGND) - Body ground
    		Shielded - Body ground
    		Shielding
    		Always
    		Below 1 V
    If the result is not as specified, the radio and display receiver assembly may have a malfunction.


    5. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Park Assist Monitoring.Rear View Monitor System.Rear View Monitor System Terminals Of Ecu

  5. Using an oscilloscope, check waveform 1.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		R20-8 (V+) - R20-16 (V-)
    Tool Setting
    		0.2 V/DIV., 50 μs/DIV.
    Condition
    		Ignition switch ON, shift lever in R


    6. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Park Assist Monitoring.Rear View Monitor System.Rear View Monitor System Terminals Of Ecu

  6. Using an oscilloscope, check waveform 2.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		R20-8 (V+) - R20-16 (V-)
    Tool Setting
    		0.2 V/DIV., 50 μs/DIV.
    Condition
    		Ignition switch ON, shift lever in R, screen blacked out by covering camera lens