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Terminals Of Ecu

  1. CHECK ENGINE SWITCH 
    Fig 1: Identifying Engine Switch Connector Terminal J31
    G05831856Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J31 switch connector.
    2. Measure the resistance of the wire harness.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (J31-8) - Body ground GR - 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 J31 switch connector.
    4. Measure the resistance and voltage at the connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (J31-8) - Body ground GR - Body ground Ground Always Below 1 Ω
      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* Pulse generation (see  1waveform 1)
      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* 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 REFERENCE CHART

        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*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 2: Identifying Waveform 1
        G05831857Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        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*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 3: Identifying Waveform 2
        G05831858Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU 
    Fig 4: Identifying P33 ECU Connector
    G05831859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P33 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E (P33-17) - Body ground W-B - Body ground Ground Always Below 1Ω
      +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.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (P33-40) - Body ground LG - Body ground Engine switch ground Always Below 1Ω
      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* Pulse generation (see  1waveform 1)
      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* 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 REFERENCE CHART

        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*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 5: Identifying Waveform 1
        G05298584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        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*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 6: Identifying Waveform 2
        G05298585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ID CODE BOX 
    Fig 7: Identifying J69 ECU Connector
    G05831862Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J69 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (J69-8) - Body ground W - B - Body ground Ground Always Below 1 Ω
      +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.
      CONNECTOR TERMINAL REFERENCE CHART

      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  1waveform 1)
      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  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 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) EFII (J69-5) - GND (J69-8)
        Tool Setting 10V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 8: Identifying Waveform 1
        G05298599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Item Content
        Symbols (Terminal No.) EFIO (J69-6) - GND (J69-8)
        Tool Setting 10V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 9: Identifying Waveform 2
        G05831864Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK POWER SOURCE CONTROL ECU 
    Fig 10: Identifying J55 ECU Connector
    G05831865Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J55 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND2 (J55-6) - Body ground W-B - Body ground Ground Always Below 1 Ω
      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 ECU Connector
    G05831866Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J29 ECU connector.
    2. Measure the resistance and voltage at the wire harness side connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SGND (J29-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND (J29-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      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 ECM Connectors E3, E4, E5, A6 And A5
    G05831867Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage of the connector.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      E1 (E4-7) - Body ground BR - Body ground Ground Always Below 1 Ω
      E01 (E5-2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E02 (E5-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E03 (E3-6) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E04 (E6-5) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E05 (E6-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      EC (A5-2)- Body ground W-B - Body ground Ground Always Below 1 Ω
      ME01 (E3-4) - Body ground W-B - Body ground Ground Always Below 1 Ω
      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  1waveform 1)
      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  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 REFERENCE CHART

        Item Content
        Symbols (Terminal No.) IMI (A6-6) - E1 (E4-7)
        Tool Setting 10V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 13: Identifying Waveform 1
        G05831868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE CHART

        Item Content
        Symbols (Terminal No.) IMO (A6-7) - E1 (E4-7)
        Tool Setting 10V/DIV., 100 msec./DIV.
        Condition Engine switch on (IG)
        Fig 14: Identifying Waveform 2
        G05298599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH) 
    Fig 15: Identifying RD And RM Junction Block Connectors
    G05831870Courtesy 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.
      CONNECTOR TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND2 (RD-7) - Body ground W-B - Body ground Ground Always Below 1 Ω
      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.
      CONNECTOR TERMINAL REFERENCE CHART

      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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