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Terminals Of Ecu [09/2014 - 11/2017]

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  1. CHECK 4WD ECU ASSEMBLY 
    GTY497761Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance of the connector.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A54-3 (IG1) - A54-4 (GND) G - W-B Power source voltage Engine switch on (IG) 11 to 14 V
      A54-2 (SLC+) - A54-1 (SLC-) B - B Transfer control solenoid signal Shift lever in D, engine idling Pulse generation (See waveform 1)
      A54-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A54-6 (CANH) - A54-5 (CANL) V - B HIGH-level CAN bus wire - LOW-level CAN bus wire Cable disconnected from negative (-) battery terminal 54 to 69 Ω

      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) A54-2 (SLC+) - A54-1 (SLC-)
      Tester Range 2 V/DIV., 1 msec./DIV.
      Condition Shift lever in D, engine idling
      GTY363323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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