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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER 
    Fig 1: Identifying D32 ECU Connector Terminals
    G04378883Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D32 amplifier connector.
    2. Measure the resistance between the terminal of the wire harness side connector and body ground.
      TERMINAL SPECIFICATIONS CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (D32-7) - Body ground V - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the D32 amplifier connector.
    4. Measure the voltage of the connector.
      TERMINAL SPECIFICATIONS CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC5 (D32-1) - AGND (D32-7) W - V Power source No key in ignition key cylinder --> Key inserted 0 V --> 4.6 to 5.4 V
      CODE (D32-4) - AGND (D32-7) LG - V Demodulated signal of key code data No key in ignition key cylinder --> Key inserted Pulse generation (see WAVEFORM 1 )
      TXCT (D32-5) - AGND (D32-7) BR - V Key code output signal No key in ignition key cylinder --> Key inserted Pulse generation (see WAVEFORM 2 )

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

    5. Inspect using an oscilloscope.
      Fig 2: Identifying Waveform 1
      G04378884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Waveform 1 (Reference):
        WAVEFORM 1 REFERENCE CHART

        Terminal CODE - GND
        Tool Setting 10 V/DIV., 20 ms/DIV.
        Condition No key in ignition key cylinder --> Key inserted
      2. Waveform 2 (Reference):
        Fig 3: Identifying Waveform 2
        G04378885Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 2 REFERENCE CHART

        Terminal TXCT - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition No key in ignition key cylinder --> Key inserted
  2. CHECK TRANSPONDER KEY ECU ASSEMBLY 
    Fig 4: Identifying D33 ECU Connector Terminals
    G04378886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D33 ECU connector, and measure the voltage and resistance between each terminal of the wire harness side connector.
      TERMINAL SPECIFICATIONS CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (D33-1) - GND (D33-16) Y - W-B Battery Always 10 to 14 V
      IG (D33-2) - AGND (D33-5) G - V Ignition switch Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      GND (D33-16) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    2. Reconnect the D33 ECU connector, and measure the voltage between each terminal of the connector.
      TERMINAL SPECIFICATIONS CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      KSW (D33-3) - GND (D33-16) B - W-B Unlock warning switch No key in ignition key cylinder --> Key inserted 10 to 14 V --> Below 1 V
      TXCT (D33-4) - AGND (D33-5) BR - V Transponder key amplifier communication signal Ignition switch ON Waveform 1
      CTY (D33-7) - GND (D33-16) L - W-B Courtesy signal Driver side door is open --> closed 10 to 14 V --> Below 1 V
      IND (D33-8) - GND (D33-16) P - W-B Security indicator signal Engine immobilizer system SET --> UNSET 3 to 5V --> Below 1 V
      D (D33-9) - GND (D33-16) O - W-B Diagnosis tester communication Ignition switch ON Pulse generation
      EFII (D33-12) GND (D33-16) L - W-B ECM input signal Ignition switch ON Waveform 4
      EFIO (D33-13) - GND (D33-16) BR - W-B ECM output signal Ignition switch ON Waveform 3
      VC5 (D33-14) - AGND (D33-5) W - V Power source Ignition switch OFF --> ON Below 1 V --> 4.6 to 5.4 V
      CODE (D33-15) - AGND (D33-5) LG - V Transponder key amplifier ground Ignition switch ON Waveform 2

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

    3. Inspect using an oscilloscope.
      1. Waveform 1 (Reference):
        Fig 5: Identifying Waveform 1
        G04378887Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 REFERENCE CHART

        Terminal TXCT - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition Ignition switch ON
      2. Waveform 2 (Reference):
        Fig 6: Identifying Waveform 2
        G04378888Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 2 REFERENCE CHART

        Terminal CODE - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition Ignition switch ON
      3. Waveform 3 (Reference):
        Fig 7: Identifying Waveform 3
        G04378889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 3 REFERENCE CHART

        Terminal EFIO - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition Ignition switch ON
      4. Waveform 4 (Reference):
        Fig 8: Identifying Waveform 4
        G04378890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 4 REFERENCE CHART

        Terminal EFII - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition Ignition switch ON
    4. Measure the resistance between each terminal of the connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (D33-5) - GND (D33-16) V - W-B Amplifier ground circuit Always Below 1 Ω

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

  3. CHECK ECM 
    Fig 9: Identifying ECM Connector Terminals
    G04378891Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B45 and D41 ECM connectors.
    2. Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.
      TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IMO (D41-15) - E01 (B45-7) BR - W-B Transponder key ECU input signal No key in ignition key cylinder --> Key inserted Pulse generation (see WAVEFORM 1 )
      IMI (D41-16) - E01 (B45-7) L - W-B Transponder key ECU output signal No key in ignition key cylinder --> Key inserted Pulse generation (see WAVEFORM 2 )
      E01 (B45-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Inspect using an oscilloscope.
      1. Waveform 1 (Reference):
        Fig 10: Identifying Waveform 1
        G04378892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 REFERENCE CHART

        Terminal IMI - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition No key in ignition key cylinder --> Key inserted
      2. Waveform 2 (Reference):
        Fig 11: Identifying Waveform 2
        G04378893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 2 REFERENCE CHART

        Terminal IMO - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition No key in ignition key cylinder --> Key inserted
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