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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 83 (Dynamic Radar Cruise Control System (HV) - Diagnostics - Introduction) >> DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model) >> Terminals Of Ecu [12/2019 - 11/2023] >> Terminals Of Ecu [12/2019 - 11/2023]

Terminals Of Ecu [12/2019 - 11/2023]

WARNING: This page is about a different variant/trim than selected.
  1. CHECK HYBRID VEHICLE CONTROL ECU 
    GTY868653Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbols) Terminal Description Condition Specified Condition
      A31-7 (STP) - H67-3 (E1) Stop light switch assembly signal Brake pedal depressed 11 to 14 V
      Brake pedal released Below 1 V
      A32-28 (ST1-) - H67-3 (E1) Stop light switch assembly signal Ignition switch ON, brake pedal depressed Below 1 V
      Ignition switch ON, brake pedal released 11 to 14 V
      H67-14 (CCS) - H67-3 (E1) Steering pad switch circuit Cruise control switch not pushed 1 MΩ or higher
      Cruise control main switch pushed Below 2.5 Ω
      CANCEL switch pushed 228 to 252 Ω
      +RES switch pushed 599 to 661 Ω
      -SET switch pushed 1463 to 1617 Ω
  2. CHECK FORWARD RECOGNITION CAMERA 
    GTY891870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.
    • Do not apply excessive force to the forward recognition camera connector.
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      R5-3 (LKSW) - R5-10 (GND) Steering pad switch assembly signal (distance control signal) Ignition switch ON, vehicle-to-vehicle distance control switch on Below 1 V
      Ignition switch ON, vehicle-to-vehicle distance control switch off 4.75 to 5.25 V
      R5-7 (IGB) - R5-10 (GND) Power source Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      R5-10 (GND) - Body ground Ground Always Below 1 Ω
    2. 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) Terminal Description Condition Specified Condition
      R5-5 (CA1P) - R5-10 (GND) CAN communication signal Ignition switch ON Pulse generation
      (See waveform 1)
      R5-6 (CANH) - R5-10 (GND) CAN communication signal Ignition switch ON Pulse generation
      (See waveform 1)
      R5-11 (CA1N) - R5-10 (GND) CAN communication signal Ignition switch ON Pulse generation
      (See waveform 2)
      R5-12 (CANL) - R5-10 (GND) CAN communication signal Ignition switch ON Pulse generation
      (See waveform 2)
      1. Waveform 1
        Item Content
        Tester Connection
        • Between R5-5 (CA1P) and R5-10 (GND)
        • Between R5-6 (CANH) and R5-10 (GND)
        Tool Setting 1 V/DIV., 10 μs./DIV.
        Condition Ignition switch ON

        HINT: 

        The waveform varies depending on the CAN communication signal.

        GTY856788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2
        Item Content
        Tester Connection
        • Between R5-11 (CA1N) and R5-10 (GND)
        • Between R5-12 (CANL) and R5-10 (GND)
        Tool Setting 1 V/DIV., 10 μs./DIV.
        Condition Ignition switch ON

        HINT: 

        The waveform varies depending on the CAN communication signal.

        GTY851183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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