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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   4B-3 - Body ground	Ground	Always	Below 1 Ω
   4C-1 - Body ground	Auxiliary battery power supply	Ignition switch off*1 Always*2	11 to 14 V
   4F-1 - Body ground	Auxiliary battery power supply	Ignition switch off*1 Always*2	11 to 14 V
   H42-19 (GND2) - Body ground	Ground	Always	Below 1 Ω

   1. *1: for HV Model
   2. *2: for Gasoline Model
3. Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
4. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
   4A-40 - Body ground*1	ACC power supply	Ignition switch off	Below 1 V
   		Ignition switch ACC	11 to 14 V
   4B-11 - Body ground	Taillight and rear side marker light drive output	Taillights on	11 to 14 V
   		Taillights off	Below 1 V
   4C-19 - Body ground	R shift position switch signal	Ignition switch off, reverse (R) not selected	Below 1 V
   		Ignition switch ON, reverse (R) selected	11 to 14 V
   4C-23 - Body ground*1	IG power supply	Ignition switch off	Below 1 V
   		Ignition switch ON	11 to 14 V
   4C-25 - Body ground*2	FOG FR relay drive output	Taillights on, fog light switch in front position	Below 1 V
   		Taillights on, fog light switch in off position	11 to 14 V
   4C-28 - Body ground	Daytime running light system drive output	Daytime running light system operating	Below 1 V
   		Daytime running light system not operating	11 to 14 V
   4C-31 - Body ground	H-LP LH relay drive output	Light control switch in head position	Below 1 V
   		Taillight off	11 to 14 V
   4C-32 - Body ground	Parking lights and front side marker lights drive output	Taillights on	11 to 14 V
   		Taillights off	Below 1 V
   4D-10 - Body ground	Back-up lights drive output	Ignition switch off, reverse (R) not selected	Below 1 V
   		Ignition switch ON, reverse (R) selected	11 to 14 V
   4D-30 - Body ground	Taillight, rear side marker light and license plate lights drive output	Taillights on	11 to 14 V
   		Taillights off	Below 1 V
   H43-12 (HRY2) - Body ground	H-LP RH relay drive output	Light control switch in head position	Below 1 V
   		Taillights off	11 to 14 V
   H43-13 (DIM) - Body ground	High beam headlight drive output	Light control switch in head position and dimmer switch in high or high flash position	Below 1 V
   		Dimmer switch not in high or high flash position	11 to 14 V
   H43-16 (HEAD) - Body ground	Light control switch head position input	Light control switch in head position	Below 1 V
   		Light control switch not in head position	11 to 14 V
   H43-23 (CLTB) - H43-25 (CLTE)	Automatic light control sensor power supply output	Ignition switch ON	11 to 14 V
   H43-24 (CLTS) - Body ground	Automatic light control sensor signal input	Ignition switch off	Below 1 V
   		Ignition switch ON	Pulse generation (See waveform 1)
   H43-26 (AHBI) - Body ground	Auto high beam switch signal input	Auto high beam switch on	Below 1 V
   		Auto high beam switch off	11 to 14 V
   H44-21 (AHID) - Body ground	Auto high beam switch indicator drive output	Ignition switch ON, auto high beam switch on	Below 1 V
   		Ignition switch ON, auto high beam switch off	11 to 14 V

   1. *1: for Gasoline Model
   2. *2: w/ Front Fog Light
   1. Waveform 1

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Tester Connection	H43-24 (CLTS) - Body ground
      Tool setting	2 V/DIV., 10 ms./DIV.
      Condition	Ignition switch ON

      HINT: 

      The communication waveform changes according to the surrounding brightness.

Refer to TERMINALS OF ECU [12/2019 - 11/2023]

Refer to TERMINALS OF ECU [12/2019 - ]

for HV Model: Refer to TERMINALS OF ECU [12/2019 - 10/2021] , or refer to TERMINALS OF ECU [10/2021 - 10/2022]

for Gasoline Model: Refer to TERMINALS OF ECU [12/2019 - 10/2022]