Terminals Of Ecu [01/2023 - ]

Fig 1: Multiplex Network Body ECU Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   4C-29 - Body ground	R - Body ground	H-LP LH relay drive output	Light control switch in head position	Below 1 V
   			Light control switch not in head position	11 to 14 V
   O1-23 (AHBI) - Body ground	SB - 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
   O2-1 (DIM) - Body ground	V - Body ground	H-LP RH relay drive output	Light control switch in head position	Below 1 V
   			Light control switch not in head position	11 to 14 V
   O2-8 (A) - Body ground	P - Body ground	Light control switch AUTO position signal input	Light control switch in AUTO position	Below 1 V
   			Light control switch not in AUTO position	Pulse generation
   O2-12 (HEAD) - Body ground	Y - Body ground	Light control switch head position signal input	Light control switch in head position	Below 1 V
   			Light control switch not in head position	Pulse generation
   O2-19 (CLTB) - O2-21 (CLTE)	GR - W	Automatic light control sensor power supply output	Engine switch off	Below 1 V
   			Engine switch on (IG), light control switch in AUTO position	11 to 14 V
   O2-20 (CLTS) - Body ground	R - Body ground	Automatic light control sensor signal input	Engine switch off	Below 1 V
   			Engine switch on (IG)	Pulse generation (See waveform 1)

   1. Waveform 1
      Fig 2: Waveform 1

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Item	Content
      Tester Connection	O2-20 (CLTS) - Body ground
      Tool setting	2 V/DIV., 10 ms./DIV.
      Condition	Engine switch on (IG)

      HINT: 

      The communication waveform changes according to the surrounding brightness.

Refer to TERMINALS OF ECU [03/2019 - ]

Refer to TERMINALS OF ECU [03/2019 - ]

Refer to TERMINALS OF ECU [03/2019 - ]

Refer to TERMINALS OF ECU [03/2019 - ]

Refer to TERMINALS OF ECU [01/2023 - ]