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Terminals Of Ecu

  1. CHECK ENGINE SWITCH 
    Fig 1: Identifying J31 Terminals Of ECU Engine Switch
    G04049151Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J31 switch connector.
    2. Measure the resistance of the wire harness.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (J31-8) - Body ground GR - Body ground Ground Always Below 1 ohms

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

    3. Reconnect the J31 switch connector.
    4. Measure the resistance and voltage at the connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (J31-8) - Body ground GR - Body ground Ground Always Below 1 ohms
      VC5 (J31-14) - AGND (J31-8) R - GR Power supply Key is not in cabin Below 1 V
      VC5 (J31-14) - AGND (J31-8) R - GR Power supply Press engine switch 4.6 to 5.4 V
      CODE (J31-10) - AGND (J31-8) SB - GR Demodulated signal of key code data Key is not in cabin Below 1 V
      CODE (J31-10) - AGND (J31-8) SB - GR Demodulated signal of key code data Press engine switch and hold key close to engine switch(1) Pulse generation (see Fig 2 )
      TXCT (J31-9) - AGND (J31-8) L - GR Key code output signal Key is not in cabin Below 1 V
      TXCT (J31-9) - AGND (J31-8) L - GR Key code output signal Press engine switch and hold key close to engine switch(1) Pulse generation (see Fig 3 )
      HINT:
      (1) 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 TABLE

        Item Content
        Symbols (Terminal No.) CODE (J31-10) - AGND (J31-8)
        Tool Setting 2 V/DIV., 20 msec./DIV.
        Condition Press engine switch and hold key close to engine switch(1)
        HINT:
        (1) Remove the key battery before performing this inspection.
        Fig 2: Identifying Waveform 1
        G04049152Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
      WAVEFORM 2 REFERENCE TABLE

      Item Content
      Symbols (Terminal No.) TXCT (J31-9) - AGND (J31-8)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch(1)
      HINT:
      (1) Remove the key battery before performing this inspection.
      Fig 3: Identifying Waveform 2
      G04021428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU 
    Fig 4: Identifying P33 Terminals Of Certification ECU
    G04049154Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P33 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE (DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (P33-17) - Body ground W-B - Body ground Ground Always Below 1 ohms
      +B1 (P33-1) - E (P33-17) L - W-B +B power supply Always 10 to 14 V
      IG (P33-18) - E (P33-17) B - W-B Ignition power supply Engine 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 P33 ECU connector.
    4. Measure the resistance and voltage of the connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE (RECONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (P33-40) - Body ground LG - Body ground Engine switch ground Always Below 1 ohms
      VC5 (P33-30) - AGND (P33-40) L - LG Engine switch power supply Key is not in cabin Below 1 V
      VC5 (P33-30) - AGND (P33-40) L - LG Engine switch power supply Press engine switch 4.6 to 5.4 V
      CODE (P33-9) - AGND (P33-40) GR - LG Engine switch CODE input Key is not in cabin Below 1 V
      CODE (P33-9) - AGND (P33-40) GR - LG Engine switch CODE input Press engine switch and hold key close to engine switch (1) Pulse generation (see waveform 1 Fig 5)
      TXCT (P33-8) - AGND (P33-40) G - LG Engine switch TX output Key is not in cabin Below 1 V
      TXCT (P33-8) - AGND (P33-40) G - LG Engine switch TX output Press engine switch and hold key close to engine switch (1) Pulse generation (see waveform 2 Fig 6)
      HINT:
      (1) 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 TABLE

        Item Content
        Symbols (Terminal No.) CODE (P33-9) - AGND (P33-40)
        Tool Setting 2 V/DIV., 20 msec./DIV.
        Condition Press engine switch and hold key close to engine switch(1)
        HINT:
        (1) Remove the key battery before performing this inspection.
        Fig 5: Identifying Waveform 1
        G04049155Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
      WAVEFORM 2 REFERENCE TABLE

      Item Content
      Symbols (Terminal No.) TXCT (P33-8) - AGND (P33-40)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch(1)
      HINT:
      (1) Remove the key battery before performing this inspection.
      Fig 6: Identifying Waveform 2
      G04021428Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ID CODE BOX 
    Fig 7: Identifying J69 Terminals Of ID Code Box Connector
    G04049157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J69 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE (DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (J69-8) - Body ground W-B - Body ground Ground Always Below 1 ohms
      +B (J69-1) - GND (J69-8) G - 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 J69 ECU connector.
    4. Measure the voltage of the connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE (RECONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      EFII (J69-5) - GND (J69-8) W - W-B ECM input signal Engine switch off Below 1 V
      EFII (J69-5) - GND (J69-8) W - W-B ECM input signal Engine switch on (IG) Pulse generation (see waveform 1 Fig 8)
      EFIO (J69-6) - GND (J69-8) P - W-B ECM output signal Engine switch off Below 1 V
      EFIO (J69-6) - GND (J69-8) P - W-B ECM output signal Engine switch on (IG) Pulse generation (see waveform 2 Fig 9)

      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 TABLE

        Item Content
        Symbols (Terminal No.) EFII (J69-5) - GND (J69-8)
        Tool Setting 10 V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 8: Identifying Reference Waveform Pattern (1 Of 2)
        G04021433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
      WAVEFORM 2 REFERENCE TABLE

      Item Content
      Symbols (Terminal No.) EFIO (J69-6) - GND (J69-8)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
      Fig 9: Identifying Reference Waveform Pattern (2 Of 2)
      G04021438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK POWER SOURCE CONTROL ECU 
    Fig 10: Identifying J55 Terminals Of Power Source Control ECU Connector
    G04049160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J55 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
    TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND2 (J55-6) - Body ground W-B - Body ground Ground Always Below 1 ohms
    AM2 (J55-12) - Body ground O - Body ground +B power supply Always 10 to 14 V
    AM1 (J55-33) - Body ground O - 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.

  5. CHECK STEERING CONTROL ECU 
    Fig 11: Identifying J29 Terminals Of Steering Control ECU Connector
    G04049161Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J29 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
    TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    SGND (J29-2) - Body ground W-B - Body ground Ground Always Below 1 ohms
    GND (J29-1) - Body ground W-B - Body ground Ground Always Below 1 ohms
    B (J29-7) - Body ground O - Body ground +B power supply Always 10 to 14 V
    IG2 (J29-6) - Body ground LG - Body ground Ignition power supply Engine switch off Below 1 V
    IG2 (J29-6) - Body ground LG - Body ground Ignition power supply 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.

  6. CHECK ECM 
    Fig 12: Identifying Terminals Of ECM Connectors
    G04049162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage of the connector.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E1 (E4-7) - Body ground W-B - Body ground Ground Always Below 1 ohms
      E01 (E5-2) - Body ground W-B - Body ground Ground Always Below 1 ohms
      E02 (E5-1) - Body ground W-B - Body ground Ground Always Below 1 ohms
      E03 (E3-6) - Body ground W-B - Body ground Ground Always Below 1 ohms
      E04 (E6-5) - Body ground W-B - Body ground Ground Always Below 1 ohms
      E05 (E6-3) - Body ground W-B - Body ground Ground Always Below 1 ohms
      EC (A5-2) - Body ground W-B - Body ground Ground Always Below 1 ohms
      ME01 (E3-4) - Body ground W-B - Body ground Ground Always Below 1 ohms
      BATT (A5-4) - E1 (E4-7) L - BR Battery (for measuring battery voltage and for ECM memory) Always 10 to 14 V
      +B (A5-6) - E1 (E4-7) B-R - BR Power source of ECM Engine switch off Below 1 V
      +B (A5-6) - E1 (E4-7) B-R - BR Power source of ECM Engine switch on (IG) 10 to 14 V
      +B1 (A5-5) - E1 (E4-7) B-R - BR Power source of ECM Engine switch off Below 1 V
      +B1 (A5-5) - E1 (E4-7) B-R - BR Power source of ECM Engine switch on (IG) 10 to 14 V
      IMI (A6-6) - E1 (E4-7) LG - BR Immobilizer code ECU input signal Engine switch off Below 1 V
      IMI (A6-6) - E1 (E4-7) LG - BR Immobilizer code ECU input signal Engine switch on (IG) Pulse generation (see waveform 1 Fig 13)
      IMO (A6-7) - E1 (E4-7) W-R - BR Immobilizer code ECU output signal Engine switch off Below 1 V
      IMO (A6-7) - E1 (E4-7) W-R - BR Immobilizer code ECU output signal Engine switch on (IG) Pulse generation (see waveform 2 Fig 14)

      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 TABLE

        Item Content
        Symbols (Terminal No.) IMI (A6-6) - E1 (E4-7)
        Tool Setting 10 V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 13: Identifying Reference Waveform Pattern (1 Of 2)
        G04021438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
      WAVEFORM 2 REFERENCE TABLE

      Item Content
      Symbols (Terminal No.) IMO (A6-7) - E1 (E4-7)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
      Fig 14: Identifying Reference Waveform Pattern (2 Of 2)
      G04021433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) 
    Fig 15: Identifying Terminals Of Main Body ECU RH (Cowl Side J/B RH) Connector
    G04049165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the RD and RM junction block connectors.
    2. Measure the resistance and voltage at the wire harness side connectors.
      TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND2 (RD-7) - Body ground W-B - Body ground Ground Always Below 1 ohms
      IG (RM-1) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V
      IG (RM-1) - Body ground B - Body ground Ignition power supply 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.

    3. Reconnect the RD and RM junction block connectors.
    4. Measure the voltage of the connector.
    TERMINAL DESCRIPTION SPECIFIED CONDITION TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IND (J74-24) - Body ground LG - Body ground Indicator light signal Key is not in cabin (immobilizer system is not set) Alternating between 10 to 14 V (0.2 seconds) to below 1 V

    If the result is not as specified, the main body ECU RH (cowl side J/B RH) may have a malfunction.

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