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Terminals Of Ecu [08/2020 - ]

  1. CHECK 4WD ECU ASSEMBLY 
    Fig 1: 4WD ECU Assembly Terminals Of ECU [08/2020 - ]
    GTY954370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance of the connector.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G131-6 (CANH) - G131-5 (CANL) G - W HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω
      G131-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G131-3 (IG1) - G131-4 (GND) BE - W-B Power source voltage Engine switch on (IG) 11 to 14 V
      G131-2 (SLC+) - G131-1 (SLC-) W - B 4WD linear solenoid signal D position, engine idling Pulse generation (See waveform 1)

      If the result is not as specified, the 4WD ECU assembly may have a malfunction.

    2. Using an oscilloscope, check the waveform 1.
      WAVEFORM 1 (REFERENCE)

      Item Content
      Terminal No. (Symbol) G131-2 (SLC+) - G131-1 (SLC-)
      Tester Range 2 V/DIV., 1 msec./DIV.
      Condition D position, engine idling
      Fig 2: Waveform 1
      GTY363323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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