LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2015 >> IS 250 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Forward Recognition Camera System - Diagnostics - Introduction) >> Forward Recognition Camera System >> Terminals Of Ecu [10/2016 - 09/2020] >> Terminals Of Ecu [10/2016 - 09/2020]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu [10/2016 - 09/2020]

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2020 Lexus IS 350, 2020 Lexus IS 300, 2019 Lexus IS 350, 2019 Lexus IS 300, and 2018 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FORWARD RECOGNITION CAMERA 
    NOTE:
    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
    • Do not apply excessive force to the S18 forward recognition camera connector.
    GTY615480Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S18 forward recognition camera connector.
    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
      S18-7 (IGB) - S18-10 (GND) P - BR Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      S18-10 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
    3. Reconnect the S18 forward recognition camera connector.
    4. w/ Forward recognition with heater hood sub-assembly:

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S18-1 (HTR) - S18-10 (GND) SB - BR Forward recognition with heater hood sub-assembly operation signal Engine switch on (IG)
      Forward recognition with heater hood sub-assembly not operating      		 11 to 14 V
      Engine switch on (IG)
      Forward recognition with heater hood sub-assembly operating      		 Below 1 V
    5. Check for pulses according to the value(s) in the table below.

      HINT: 

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the forward recognition camera is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S18-5 (CA1P) - S18-10 (GND) R - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 1)
      S18-11 (CA1N) - S18-10 (GND) B - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 2)
      S18-6 (CANH) - S18-10 (GND) GR - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 1)
      S18-12 (CANL) - S18-10 (GND) B - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 2)
      1. WAVEFORM 1
        Item Content
        Terminal Name Between S18-5 (CA1P) and S18-10 (GND)
        Between S18-6 (CANH) and S18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

        Fig 1: Waveform 1
        GTY527215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. WAVEFORM 2
        Item Content
        Terminal Name Between S18-11 (CA1N) and S18-10 (GND)
        Between S18-12 (CANL) and S18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

        Fig 2: Waveform 2
        GTY531906Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals