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Terminals Of Ecu

  1. CHECK ENGINE SWITCH 
    Fig 1: Identifying E68 Engine Switch ECU Connector Terminals
    G05252102Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E68 switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      ENGINE SWITCH RESISTANCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (E68-8) - 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 E68 switch connector.
    4. Measure the resistance and voltage according to the value(s) in the table below.
      ENGINE SWITCH RESISTANCE AND VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (E68-8) - Body ground V - Body ground Ground Always Below 1 Ω
      VC5 (E68-14) - AGND (E68-8) O - V Power supply Key is not in cabin Below 1 V
      Press engine switch 4.6 to 5.4 V
      CODE (E68-10) - AGND (E68-8) W - V Demodulated signal of key code data Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  1waveform 1)
      TXCT (E68-9) - AGND (E68-8) GR - V Key code output signal Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  2waveform 2)
      HINT:
      *: Remove the key battery before performing this inspection.

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

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

        Item Content
        Symbols (Terminal No.) CODE (E68-10) - AGND (E68-8)
        Tool Setting 2V/DIV., 20 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 2: Waveform 1 Graph (Reference)
        G04979924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM 2 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) TXCT (E68-9) - AGND (E68-8)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 3: Waveform 2 Graph (Reference)
        G04979925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU 
    Fig 4: Identifying E13 Certification ECU Connector Terminals
    G05252105Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E13 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      CERTIFICATION ECU DISCONNECT E13 CONNECTOR

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (E13-17) - Body ground W-B - Body ground Ground Always Below 1 Ω
      +B1 (E13-1) - E (E13-17) W - W-B +B power supply Always 10 to 14 V
      IG (E13-18) - E (E13-17) B - W-B Ignition power supply Power switch off Below 1 V

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

    3. Reconnect the E13 ECU connector.
    4. Measure the resistance and voltage according to the value(s) in the table below.
      CERTIFICATION ECU RECONNECT E13 ECU

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (E13-40) - Body ground V - Body ground Power switch ground Always Below 1 Ω
      VC5 (E13-30) - AGND (E13-40) O - V Power switch power supply Key is not in cabin Below 1 V
      Press engine switch* 4.6 to 5.4 V
      CODE (E13-9) - AGND (E13-40) W - V Power switch CODE input Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  1waveform 1)
      TXCT (E13-8) - AGND (E13-40) GR - V Power switch TXCT output Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  2waveform 2)
      HINT:
      *: Remove the key battery before performing this inspection.

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

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

        Item Content
        Symbols (Terminal No.) CODE (E13-9) - AGND (E13-40)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 5: Waveform 1 Graph (Reference)
        G04979924Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM 2 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) TXCT (E13-8) - AGND (E13-40)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Press engine switch and hold key close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 6: Waveform 2 Graph (Reference)
        G04979925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ID CODE BOX 
    Fig 7: Identifying E32 ID Code Box Connector Terminals
    G05252108Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E32 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      ID CODE BOX RESISTANCE AND VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (E32-8) - Body ground W-B - Body ground Ground Always Below 1 Ω
      +B (E32-1) - GND (E32-8) W - W-B +B power supply Always 10 to 14 V

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

    3. Reconnect the E32 ECU connector.
    4. Measure the voltage according to the value(s) in the table below.
      ID CODE BOX VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      EFII (E32-5) - GND (E32-8) BR - W-B ECM input signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  1waveform 1)
      EFIO (E32-6) - GND (E32-8) L - W-B ECM output signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  2waveform 2)

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

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

        Item Content
        Symbols (Terminal No.) EFII (E32-5) - GND (E32-8)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)
        Fig 8: Waveform 1 Graph (Reference)
        G04979930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM 2 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) EFIO (E32-6) - GND (E32-8)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)
        Fig 9: Waveform 2 Graph (Reference)
        G04979931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK STEERING CONTROL ECU 
    Fig 10: Identifying E78 Steering Control ECU Connector Terminals
    G05252111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E78 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      STEERING CONTROL ECU RESISTANCE AND VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SGND (E78-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND (E78-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      B (E78-7) - Body ground B - Body ground +B power supply Always 10 to 14 V
      IG2 (E78-6) - Body ground B - Body ground Ignition power supply Engine switch off 0 V
      Engine switch on (IG) 10 to 14 V

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

  5. CHECK ECM 
    Fig 11: Identifying B12 And A10 ECM Connector Terminals
    G05252112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      ECM RESISTANCE AND VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E1 (B12-81) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E01 (B12-22) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E02 (B12-21) - Body ground B-W - Body ground Ground Always Below 1 Ω
      E03 (B12-104) - Body ground B - Body ground Ground Always Below 1 Ω
      E04 (B12-23) - Body ground W - Body ground Ground Always Below 1 Ω
      E05 (B12-46) - Body ground W - Body ground Ground Always Below 1 Ω
      ME01 (B12-20) - Body ground B - Body ground Ground Always Below 1 Ω
      BATT (A10-20) - E1 (B12-81) Y - W-B Battery (for measuring battery voltage and for ECM memory) Always 10 to 14 V
      +B (A10-2) - E1 (B12-81) R - W-B Power source of ECM Engine switch off Below 1 V
      Engine switch on (IG) 10 to 14 V
      +B2 (A10-1) - E1 (B12-81) R - W-B Power source of ECM Engine switch off Below 1 V
      Engine switch on (IG) 10 to 14 V
      IMI (A10-11) - E1 (B12-81) Y - W-B immobilizer code ECU input signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  1waveform 1)
      IMO (A10-10) - E1 (B12-81) G - W-B immobilizer code ECU output signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  2waveform 2)

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

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

        Item Content
        Symbols (Terminal No.) IMI (A10-11) - E1 (B12-81)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)
        Fig 12: Waveform 2 Graph (Reference)
        G04979931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM 2 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) IMO (A10-10) - E1 (B12-81)
        Tool Setting 10 V/DIV., 100 ms./DIV.
        Condition Engine switch on (IG)
        Fig 13: Waveform 1 Graph (Reference)
        G04979930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. CHECK MAIN BODY ECU (INSTRUMENT PANEL J/B) 
    1. Disconnect the DF junction block connectors.
    2. Disconnect the E59, E61 and E60 main body ECU connectors.
      Fig 14: Identifying E59, E61 And E60 Main Body ECU Connector Terminals
      G05252115Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance and voltage according to the value(s) in the table below.
      MAIN BODY ECU (INSTRUMENT PANEL J/B) RESISTANCE AND VOLTAGE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND1 (DF-10) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND3 (E59-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      AM1 (E61-6)-Body ground L - Body ground +B power supply Always 10 to 14 V
      AM2 (E60-1) - Body ground L - Body ground +B power supply Always 10 to 14 V

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

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