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

Audio Visual Telematics. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Park Assist Monitoring. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

  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

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Park Assist Monitoring.Rear View Monitor System (For Radio And Display Type).Rear View Monitor System (For Radio And Display Type) Terminals Of Ecu

  1. Disconnect the G127 and G129 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
    G127-1 (IG) - G129-7 (GND)
    		P - BR
    		IG signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		11 to 14 V
    G129-3 (ACC) - G129-7 (GND)
    		GR - BR
    		Accessory (On)
    		Ignition switch off
    		Below 1 V
    Ignition switch ACC
    		11 to 14 V
    G129-4 (B) - G129-7 (GND)
    		L-Y - BR
    		Battery
    		Always
    		11 to 14 V
    G129-7 (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 G127 and G129 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
    G2-8 (V+) - G2-16 (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)
    G2-7 (CA+) - G2-15 (CGND)
    		B - Shielded
    		Power source
    		Ignition switch ON, shift lever in R
    		5.5 to 7.05 V
    G2-15 (CGND) - Body ground
    		Shielded - Body ground
    		Shielding
    		Always
    		Below 1 V
    G127-2 (REV) - G129-7 (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
    If the result is not as specified, the radio and display receiver assembly may have a malfunction.


    5. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Park Assist Monitoring.Rear View Monitor System (For Radio And Display Type).Rear View Monitor System (For Radio And Display Type) Terminals Of Ecu

  5. Using an oscilloscope, check waveform 1.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		G2-8 (V+) - G2-16 (V-)
    Tool Setting
    		0.2 V/DIV., 50 μs/DIV.
    Condition
    		Ignition switch ON, shift lever in R


    6. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Park Assist Monitoring.Rear View Monitor System (For Radio And Display Type).Rear View Monitor System (For Radio And Display Type) Terminals Of Ecu

  6. Using an oscilloscope, check waveform 2.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		G2-8 (V+) - G2-16 (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