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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TRANSPONDER KEY AMPLIFIER 
    Fig 1: Identifying I14 Amplifier Terminal Connector
    G05131842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I14 amplifier connector.
    2. Measure the resistance of the wire harness side connector.
      RESISTANCE REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (I14-7) - Body ground BR-R(1) - Body ground Ground Always Below 1 Ω
      GND (I14-7) - Body ground BR(2) - Body ground Ground Always Below 1 Ω
      (1) 3MZ-FE Coupe, 2AZ-FE
      (2) 3MZ-FE Convertible

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

    3. Reconnect the 114 amplifier connector.
    4. Measure the resistance and voltage of the connector.
      RESISTANCE REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC5 (I14-1) - GND (I14-7) Y-B(1) - BR-R(1) Power source 1: No key in ignition key cylinder → 2: Key inserted 1: 0 V → 2: 4.6 to 5.4 V
      VC5 (I14-1) - GND (I14-7) R-L(2) - BR(2) Power source 1: No key in ignition key cylinder → 2: Key inserted 1: 0 V → 2: 4.6 to 5.4 V
      CODE(I14-4) - GND(I14-7) Y(1) - BR-R(1) Demodulated signal of key code data 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see  1 waveform 1)
      CODE(I14-4) - GND(I14-7) G-W(2) - BR(2) Demodulated signal of key code data 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see  1 waveform 1)
      TXCT (I14-5) - GND (I14-7) Y-R(1) - BR-R(1) Key code output signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see  2 waveform 2)
      TXCT (I14-5) - GND (I14-7) L-Y(2) - BR(2) Key code output signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see  2 waveform 2)
      GND (I14-7) - Body ground BR-R(1) - Body ground Ground Always Below 1 Ω
      GND (I14-7) - Body ground BR(2) - Body ground Ground Always Below 1 Ω
      (1) 3MZ-FE Coupe, 2AZ-FE
      (2) 3MZ-FE Convertible

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

    5. Inspect using an oscilloscope.
      1. Waveform 1 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal CODE - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
        Fig 2: Identifying Waveform 1
        G04830929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal TXCT - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
  2. CHECK TRANSPONDER KEY ECU ASSEMBLY 
    Fig 3: Identifying Waveform 2
    G04830930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying T5 ECU Connector
    G05131845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (T5-13) - Body ground BR-R(1) - Body ground Ground Always Below 1 Ω
      AGND (T5-13) - Body ground BR(2) - Body ground Ground Always Below 1 Ω
      +B (T5-1) - GND (T5-14) W-R - W-B Battery Always 10 to 14 V
      IG (T5-2) - AGND (T5-13) B-O - BR-R(1) Ignition switch Ignition switch 1: OFF → 2: Key inserted 1: 0 V → 2: 10 to 14 V
      IG (T5-2) - AGND (T5-13) B-O - BR(2) Ignition switch Ignition switch 1: OFF → 2: Key inserted 1: 0 V → 2: 10 to 14 V
      KSW (T5-10) - AGND (T5-13) L - BR-R(1) Unlock warning switch 1: No key in ignition key cylinder → 2: Key inserted 1: 10 kΩ or higher → 2: Below 1 Ω
      KSW (T5-10) - AGND (T5-13) L - BR(2) Unlock warning switch 1: No key in ignition key cylinder → 2: Key inserted 1: 10 kΩ or higher → 2: Below 1 Ω
      (1) 3MZ-FE Coupe, 2AZ-FE
      (2) 3MZ-FE Convertible

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

    3. Reconnect the T5 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC5 (T5-8) - AGND (T5-13) Y-B(1) - BR-R(1) Power source Ignition switch 1: OFF → 2: ON 1: 0 V → 2: 4.6 to 5.4 V
      VC5 (T5-8) - AGND (T5-13) R-L(2) - BR(2) Power source Ignition switch 1: OFF → 2: ON 1: 0 V → 2: 4.6 to 5.4 V
      TXCT (T5-12) - AGND (T5-13) Y-R(1) - BR-R(1) Transponder key amplifier communication signal Ignition switch 1: OFF → 2: ON Pulse generation (see  waveform 1)
      TXCT (T5-12) - AGND (T5-13) L-Y(2) - BR(2) Transponder key amplifier communication signal Ignition switch 1: OFF → 2: ON Pulse generation (see  waveform 1)
      CODE (T5-11) - AGND (T5-13) Y(1) - BR-R(1) Transponder key amplifier communication signal Ignition switch 1: OFF → 2: ON Pulse generation (see   waveform 2)
      CODE (T5-11) - AGND (T5-13) G-W(2) - BR(2) Transponder key amplifier communication signal Ignition switch 1: OFF → 2: ON Pulse generation (see   waveform 2)
      EFIO (T5-6) - AGND (T5-13) V-G(1) - BR-R(1) ECM output signal Ignition switch 1: OFF → 2: ON Pulse generation (see   waveform 3)
      EFIO (T5-6) - AGND (T5-13) BR-R(2) - BR(2) ECM output signal Ignition switch 1: OFF → 2: ON Pulse generation (see   waveform 3)
      EFII (T5-7) - AGND (T5-13) BR-W - BR-R(1) ECM input signal Ignition switch 1: OFF → 2: ON Pulse generation (see  waveform 4)
      EFII (T5-7) - AGND (T5-13) BR-W - BR(2) ECM input signal Ignition switch 1: OFF → 2: ON Pulse generation (see   waveform 4)
      (1) 3MZ-FE Coupe, 2AZ-FE
      (2) 3MZ-FE Convertible

      If the result is not as specified, there may be a malfunction on the ECU.

    5. Inspect using an oscilloscope.
      1. Waveform 1 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal TXCT - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition Ignition switch 1: OFF → 2: ON
        Fig 5: Identifying Waveform 1
        G04830932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal CODE - GND
        Tool Setting 5 V/DIV., 20 ms/DIV.
        Condition Ignition switch 1: OFF → 2: ON
        Fig 6: Identifying Waveform 2
        G04830929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Waveform 3 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal EFIO - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition Ignition switch 1: OFF → 2: ON
        Fig 7: Identifying Waveform 3
        G04830934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Waveform 4 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal EFII - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition Ignition switch 1: OFF → 2: ON
        5. Fig 8: Identifying Waveform 4
        G04830935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ECM (3MZ-FE) 
    Fig 9: Identifying ECM Connector Terminal (3MZ-FE)
    G05128365Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E5 and E6 ECM connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IMI (E5-16) - E1 (E6-1) V-G(1) - BR Transponder key ECU input signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see   waveform 1)
      IMI (E5-16) - E1 (E6-1) BR-R(2) - BR Transponder key ECU input signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see   waveform 1)
      IMO (E5-15) - E1 (E6-1) BR-W - BR Transponder key ECU output signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see   waveform 2)
      E1 (E6-1) - Body ground BR - Body ground Ground Always Below 1 Ω
      (1) Coupe
      (2) Convertible

      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)
        WAVEFORM REFERENCE CHART

        Terminal IMI - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
        Fig 10: Identifying Waveform 1
        G04830934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal IMO - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
        3. Fig 11: Identifying Waveform 2
        G04830935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK ECM (2AZ-FE) 
    Fig 12: Identifying ECM Connector Terminals (2AZ-FE)
    G05131853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E5 and E8 ECM connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IMI (E5-16) - E1 (E8-3) V-G - BR Transponder key ECU input signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see   waveform 1)
      IMO (E5-15) - E1 (E8-3) BR-W - BR Transponder key ECU output signal 1: No key in ignition key cylinder → 2: Key inserted Pulse generation (see   waveform 2)
      E1 (E8-3) - Body ground BR - 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)
        WAVEFORM REFERENCE CHART

        Terminal IMI - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
        Fig 13: Identifying Waveform 1
        G04830934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Terminal IMO - GND
        Tool Setting 10 V/DIV., 500 ms/DIV.
        Condition 1: No key in ignition key cylinder → 2: Key inserted
        Fig 14: Identifying Waveform 2
        G04830935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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