Terminals Of Ecu [12/2019 - 10/2022]

Fig 1: Parking Assist Ecu [12/2019 - 10/2022]

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H20 parking assist ECU connector.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H20-1 (+B) - H20-4 (GND1)	Power source signal	Always*1	11 to 14 V
   		Ignition switch off*2
   H20-2 (ACC) - H20-4 (GND1)	ACC power source signal	Ignition switch ACC	11 to 14 V
   		Ignition switch off	Below 1 V
   H20-3 (IG) - H20-4 (GND1)	IG power source signal	Ignition switch ON	11 to 14 V
   		Ignition switch off	Below 1 V
   H20-4 (GND1) - Body ground	Ground	Always	Below 1 Ω

   1. *1: for Gasoline Model
   2. *2: for HV Model
3. Reconnect the H20 parking assist ECU connector.
4. Measure the voltage, resistance and waveform according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   H19-6 (RSW+) - H20-4 (GND1)	Terminal required by law	Panoramic image being displayed	0 to 2 V
   		Panoramic image not being displayed	5.5 to 7.05 V
   H19-10 (LCV+) - H19-35 (LGND)	Side television camera assembly LH display signal input	Ignition switch ON with the camera lens of the side television camera assembly LH not covered, displaying the panoramic image	Pulse generation (See waveform 1)
   		Ignition switch ON with the camera lens of the side television camera assembly LH covered, blacking out the panoramic image	Pulse generation (See waveform 2)
   H19-11 (SGND) - Body ground	Shielded - Body ground	Always	Below 1 Ω
   H19-12 (LCB+) - H19-35 (LGND)	Power source to side television camera assembly LH	Ignition switch ON	5.5 to 7.05 V
   H19-13 (BCV-) - H20-4 (GND1)	Front television camera assembly ground	Always	Below 1 Ω
   H19-14 (SGND) - Body ground	Shielded - Body ground	Always	Below 1 Ω
   H19-15 (BCB+) - H19-37 (BGND)	Power source to front television camera assembly	Ignition switch ON	5.5 to 7.05 V
   H19-16 (RCV-) - H20-4 (GND1)	Side television camera assembly RH ground	Always	Below 1 Ω
   H19-17 (RGND) - H20-4 (GND1)	Side television camera assembly RH ground	Always	Below 1 Ω
   H19-29 (CV+) - H19-32 (CGND)	Rear television camera assembly display signal input	Ignition switch ON with the camera lens of the rear television camera assembly not covered, displaying the panoramic image	Pulse generation (See waveform 1)
   		Ignition switch ON with the camera lens of the rear television camera assembly covered, blacking out the panoramic image	Pulse generation (See waveform 2)
   H19-30 (CV-) - H20-4 (GND1)	Rear television camera assembly ground	Always	Below 1 Ω
   H19-31 (SGND) - Body ground	Shielded - Body ground	Always	Below 1 Ω
   H19-32 (CGND) - Body ground	Rear television camera assembly ground (shield)	Always	Below 1 Ω
   H19-33 (CB+) - H19-32 (CGND)	Power source to rear television camera assembly	Ignition switch ON	5.5 to 7.05 V
   H19-34 (LCV-) - H20-4 (GND1)	Side television camera assembly LH ground	Always	Below 1 Ω
   H19-35 (LGND) - H20-4 (GND1)	Side television camera assembly LH ground	Always	Below 1 Ω
   H19-36 (BCV+) - H19-37 (BGND)	Front television camera assembly display signal input	Ignition switch ON with the camera lens of the front television camera assembly not covered, displaying the panoramic image	Pulse generation (See waveform 1)
   		Ignition switch ON with the camera lens of the front television camera assembly covered, blacking out the panoramic image	Pulse generation (See waveform 2)
   H19-37 (BGND) - H20-4 (GND1)	Front television camera assembly ground	Always	Below 1 Ω
   H19-38 (RCV+) - H19-17 (RGND)	Side television camera assembly RH display signal input	Ignition switch ON with the camera lens of the side television camera assembly RH not covered, displaying the panoramic image	Pulse generation (See waveform 1)
   		Ignition switch ON with the camera lens of the side television camera assembly RH covered, blacking out the panoramic image	Pulse generation (See waveform 2)
   H19-39 (SGND) - Body ground	Shielded - Body ground	Always	Below 1 Ω
   H19-40 (RCB+) - H19-17 (RGND)	Power source to side television camera assembly RH	Ignition switch ON	5.5 to 7.05 V
   H20-14 (REV) - H20-4 (GND1)	Reverse signal input	Ignition switch ON, panoramic view monitor switch (front wide view switch) on, shift lever in R	Below 1 V
   		Ignition switch ON, panoramic view monitor switch (front wide view switch) on, shift lever except R	11 to 14 V
   H20-15 (BLSW) - Body ground	Panoramic view monitor switch (front wide view switch) signal	Ignition switch ON, panoramic view monitor switch (front wide view switch) not pushed	5.5 to 6.5 V
   		Ignition switch ON, panoramic view monitor switch (front wide view switch) pushed	Below 1 V
   H20-11 (CANH)	CAN communication line	-	-
   H20-12 (CANL)	CAN communication line	-	-
   H103-1 (GV+)	Video signal (Digital)	-	-
   H103-2 (GV-)	Video signal (Digital)	-	-
   H103-3 (GND)	Shield ground	-	-

5. Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Waveform 1 (camera lens is not covered, displaying an image)
   *b	Waveform 2 (camera lens is covered, blacking out the screen)
   *c	Synchronization Signal
   *d	Video Waveform

   Reference (Oscilloscope waveform):

   HINT: 

   A waterproof connector is used for the rear television camera assembly, front television camera assembly, side television camera assembly LH and side television camera assembly RH. Therefore, inspect the waveform at the parking assist ECU with the connector connected.

   1. Waveform 1 (camera lens is not covered, displaying an image)

      Item	Content
      Measurement terminal	H19-29 (CV+) - H19-32 (CGND) H19-10 (LCV+) - H19-35 (LGND) H19-36 (BCV+) - H19-37 (BGND) H19-38 (RCV+) - H19-17 (RGND)
      Measurement setting	200 mV/DIV., 50 μs./DIV.
      Condition	Panoramic view monitor system operating

      HINT: 

      • The video waveform changes according to the image sent by the rear television camera assembly, front television camera assembly, side television camera assembly LH or side television camera assembly RH.
      • The video waveform is constantly output when the ignition switch is turned to ACC.
   2. Waveform 2 (camera lens is covered, blacking out the screen)

      Item	Content
      Measurement terminal	H19-29 (CV+) - H19-32 (CGND) H19-10 (LCV+) - H19-35 (LGND) H19-36 (BCV+) - H19-37 (BGND) H19-38 (RCV+) - H19-17 (RGND)
      Measurement setting	200 mV/DIV., 50 μs./DIV.
      Condition	Panoramic view monitor system operating

      HINT: 

      • The video waveform changes according to the image sent by the rear television camera assembly, front television camera assembly, side television camera assembly LH or side television camera assembly RH.
      • The video waveform is constantly output when the ignition switch is turned to ACC.

Refer to TERMINALS OF ECU [12/2019 - 10/2022]

Refer to TERMINALS OF ECU [12/2019 - 10/2022]