ACTIVE TORQUE CONTROL 4WD SYSTEM TERMINALS OF ECU


  1. CHECK 4WD ECU

    A019LEI

    1. Measure the voltage and resistance of the connector.

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      7 (4WDL) - Body ground 4 wheel drive control switch signal Engine switch on (IG) and Press continuously 4 wheel drive control switch ON Below 1 V
      14 (CANH) - 16 (CANL) CAN communication Engine switch off 54 to 69 Ω
      23 (GND) - Body ground Ground Engine switch off Below 1 Ω
      11 (IG1) - 23 (GND) Power source voltage Engine switch on (IG) 10 to 14 V
      13 (SLC+) - 32 (SLC-) 4WD linear solenoid signal D position, Idling Pulse generation (See waveform 1)
      9 (BSLC) - 23 (GND) Power source voltage Always 10 to 14 V

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

    2. A019K67E01

      Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference)
      Terminal Name Content
      Tester Range 5 V/DIV., 1 msec./DIV.
      Condition D position, Idling