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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY ECU ASSY 
    Fig 1: Checking Transponder Key ECU Assy
    G02957005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T13 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      TRANSPONDER KEY ECU ASSY (DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (T13-13) - Body ground V - Body ground Ground Always Below 1 ohms
      CPUB (T13-1) - GND (T13-14) L-O - W-B +B power supply Always 10 to 14 V
      IG2 (T13-2) - AGND (T13-13) G-B - V Ignition power supply Ignition switch ON 10 to 14 V
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch signal No key in ignition key cylinder 10 k ohms or higher
      KSW (T13-3) - AGND (T13-13) LG-B - V Unlock warning switch signal Key inserted Below 1 ohms

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the T13 ECU connector.
    4. Measure the voltage of the connector.

    Standard: 

    TRANSPONDER KEY ECU ASSY (RECONNECTED)

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    VC12 (T13-9) - AGND (T13-13) Y - V Power source Ignition switch ON 4.6 to 5.4 V

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

  2. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) 
    Fig 2: Checking Multiplex Network Door ECU Front LH (Driver Door ECU)
    G02957006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D17 and D19 ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.

    Standard: 

    DRIVER DOOR ECU

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (D19-1) - Body ground W-B - Body ground Ground Always Below 1 ohms
    CPUB (D19-4) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
    SIG (D19-5) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
    BDR (D19-6) - Body ground B-R - Body ground +B power supply Always 10 to 14 V
    CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door CLOSED 10 k ohms or higher
    CTY (D17-27) - Body ground R-W - Body ground Driver side courtesy switch input Driver side door OPEN Below 1 ohms

    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. CHECK THEFT WARNING ECU ASSY 
    Fig 3: Checking Theft Warning ECU Assy
    G02957007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T7 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    THEFT WARNING ECU ASSY

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG (T7-24) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V
    +B (T7-1) - Body ground L-O - Body ground +B power supply Always 10 to 14 V
    +B2 (T7-21) - Body ground B-O - Body ground +B2 power supply Always 10 to 14 V
    GND (T7-20) - Body ground W-B - Body ground Ground Always Below 1 ohms

    If the result is not as specified, there may be a malfunction on the wire harness side.

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