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Home >> Toyota >> 2012 >> Matrix Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 214 (Active Torque Control 4WD System (Diagnostics - Introduction)) >> Active Torque Control 4WD System >> Terminals Of Ecu >> Terminals Of Ecu
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Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Toyota Matrix. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK 4WD CONTROL ECU 
    Fig 1: 4WD Control ECU Connector Terminal Identification
    GTY217985Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance of the connector.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      14 (CANH) - 16 (CANL) CAN communication Ignition switch off 54 to 69 Ω
      23 (GND) - Body ground Ground Always Below 1 Ω
      11 (IG1) - 23 (GND) Power source voltage Ignition switch ON 10 to 14 V
      13 (SLC+) - 32 (SLC-) 4WD linear solenoid signal Ignition switch ON Pulse generation (See Fig 2waveform 1)
      9 (BSLC) - 23 (GND) Power source voltage Ignition switch ON 10 to 14 V

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

    2. Using an oscilloscope, check the waveform 1.
      Fig 2: Waveform 1 Graph
      GTY229749Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 (REFERENCE)

      Terminal Name Content
      Tester Range 5 V/DIV., 2 msec./DIV.
      Condition Engine stop, ignition switch ON
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