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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY ECU ASSY 
    Fig 1: >Identifying Terminals Of T9 ECU
    G03003030Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T9 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (T9-1) - GND (T9-14) V-Y - W-B +B (CPUB) power supply Always 10 to 14V
      GND (T9-14) - Body ground W-B - Body ground Ground Always Below 1 Ω
      KSW (T9-3) - GND (T9-14) LG-B - W-B Unlock warning switch input 1: No key in ignition key cylinder --> 2: Key inserted 1: 10 kΩ or higher --> 2: Below 1 Ω

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

    3. Reconnect the T9 ECU connector.
    4. Measure the voltage of the connector.

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    KSW (T9-3) - GND (T9-14) LG-B - W-B Unlock warning switch input 1: No key in ignition key cylinder --> 2: Key inserted 1: 10 to 14V --> 2:0 V

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

  2. CHECK STEERING LOCK ECU 
    Fig 2: Identifying Terminals Of Steering Lock ECU
    G03003031Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S46 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard: 

      SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (S46-1) - Body ground V-Y - Body ground +B (CPUB) Power supply Always 10 to 14V
      +B (S46-10)- Body ground R-L - Body ground +B Power supply Always 10 to 14V
      KSW (S46-12) - Body ground LG-B -Body ground Unlock warning switch input 1: No key in starter switch --> 2: Key inserted 1: 10 kΩ or higher --> 2: Below 1 Ω
      PUSH (S46-11)- Body ground P-B -Body ground Push switch input 1: No key in starter switch --> 2: Key inserted 1: 10 kΩ or higher --> 2: Below 1 Ω
      GND (S46-9) - Body ground W-B -Body ground Ground Always Below 1Ω

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

    3. Reconnect the S46 ECU connector.
    4. Measure the voltage of the connector.

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    KSW (S46-12) - GND (S46-9) LG-B - W-B Unlock warning switch input 1: No key in ignition cylinder --> 2: Key inserted 1: 10 to 14V --> 2: 0V
    PUSH (S46-11) - GND (S46-9) P-B - W-B Push switch input 1: No key in ignition cylinder --> 2: Key inserted 1: 10 to 14V --> 2:0V

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

  3. CHECK DRIVER DOOR ECU 
    Fig 3: Identifying Terminals Of Driver Door ECU
    G03003032Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D25 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.

    Standard: 

    SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    CPUB (D25-4) -Body ground V-Y -Body ground +B (CPUB) power supply Always 10 to 14V
    SIG (D25-5) -Body ground R-L -Body ground +B (SIG) power supply Ignition switch 1: OFF --> 2: ON 1: Below 1 V --> 2: 10 to 14V
    BDR (D25-6) -Body ground R-Body ground +B (BDR) power supply Always 10 to 14V
    GND (D25-1) -Body ground W-B -Body ground Ground Always Below 1 Ω
    CTY (D25-23) -Body ground P-G -Body ground Driver door courtesy switch input Driver door 1: CLOSED --> 2: OPEN 1: 10 kΩ or higher --> 2: Below 1 Ω

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

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