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Terminals Of Ecu

  1. CHECK ENGINE SWITCH 
    Fig 1: Identifying L36 Engine Switch Connector Terminals
    G04944569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L36 switch connector.
    2. Measure the resistance according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L36-5 (GND) - Body ground W - 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 L36 switch connector.
    4. Measure the resistance according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L36-8 (AGND) - Body ground L - Body ground Ground Always Below 1 Ω
      L36-14 (VC5) - L36-8 (AGND) V - L Power supply Key is not in cabin Below 1 V
      Press engine switch* 4.6 to 5.4 V
      L36-10 (CODE) - L36-8 (AGND) W - L 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  e waveform 1)
      L36-9 (TXCT) - L36-8 (AGND) BE - L 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  f waveform 2)
      HINT:
      *: Remove the key's battery before performing this inspection.

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

    5. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERENCE CHART

      Item Content
      Terminal No. (Symbols) L36-10 (CODE) - L36-8 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key's battery before performing this inspection.
      Fig 2: Oscilloscope Waveform Referrence Graph 1
      G06188838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) L36-9 (TXCT) - L36-8 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key's battery before performing this inspection.
      Fig 3: Oscilloscope Waveform Referrence Graph 2
      G06188839Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU 
    Fig 4: Identifying L15 And L16 Certification ECU Connector Terminals
    G04944572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L15 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-17(E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L15-1 (+B1) - L15-17 (E) L - W-B +B power supply Always 11 to 14 V
      L15-18 (IG) - L15-17 (E) L - 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 L15 ECU connector.
    4. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L15-40 (AGND) - Body ground L - Body ground engine switch ground Always Below 1 Ω
      L15-30 (VC5) - L15-40 (AGND) V - L Engine switch power supply Key is not in cabin Below 1 V
      Press engine switch* 4.6 to 5.4 V
      L15-9 (CODE) - L15-40 (AGND) W - L Engine switch CODE input Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  e waveform 1)
      L15-8 (TXCT) - L15-40 (AGND) BE - L Engine switch TX output Key is not in cabin Below 1 V
      Press engine switch and hold key close to engine switch* Pulse generation (see  f waveform 2)
      HINT:
      *: Remove the key's battery before performing this inspection.

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

    5. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) L15-9 (CODE) - L15-40 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key's battery before performing this inspection.
      Fig 5: Oscilloscope Waveform Referrence Graph 1
      G06188838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) L15-8 (TXCT) - L15-40 (AGND)
      Tool Setting 2 V/DIV., 20 msec./DIV.
      Condition Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key's battery before performing this inspection.
      7. Fig 6: Oscilloscope Waveform Referrence Graph 2
      G04944574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ID CODE BOX 
    Fig 7: Identifying L32 ID Code Box Connector Terminals
    G04944575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L32 box connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L32-8 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L32-1 (+B) - L32-8 (GND) L - W-B +B power supply Always 11 to 14 V

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

    3. Reconnect the L32 ECU connector.
    4. Measure the voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L32-5 (EFII) - L32-8 (GND) B - W-B ECM input signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  e waveform 1)
      L32-6 (EFIO) - L32-8 (GND) L - W-B ECM output signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  f waveform 2)

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

    5. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) L32-5 (EFII) - L32-8 (GND)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
      Fig 8: Oscilloscope Waveform Referrence Graph 1
      G04944576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) L32-6 (EFIO) - L32-8 (GND)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
      Fig 9: Oscilloscope Waveform Referrence Graph 2
      G06188845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK) 
    Fig 10: Identifying Main Body ECU (Driver Side Junction Block) Connector Terminals
    G04943821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DA and DF ECU connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      DA-40 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DA-41 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      DF-1 (ACC) - DA-40 (GND2) B - W-B ACC power supply Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V
      DF-1 (IG) - DA-40 (GND2) B - W-B IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

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

  5. CHECK STEERING LOCK ACTUATOR (STEERING LOCK ECU) 
    Fig 11: Identifying L33 Steering Lock Actuator Connector Terminals (Steering Lock ECU)
    G04944579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L33 ECU connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      L33-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
      L33-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      L33-7 (B) - Body ground P - Body ground +B power supply Always 11 to 14 V
      L33-6 (IG2) - Body ground L - Body ground Ignition power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 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 Connector Terminal E1, E2, E3, E4, A13 And A14
    G04944580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage according to the value(s) in the table below.
      TERMINAL DESCRIPTION CHART

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      E3-1 (E1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E2-2(E01) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E2-1 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A13-5 (E03) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E3-4 (E04) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A14-1 (EC) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E2-5 (ME01) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A14-7 (BATT) - E3-1 (E1) B - W-B Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
      A13-2(+B) - E3-1 (E1) B-W - W-B Power source of ECM Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A13-1 (+B2) - E3-1 (E1) B-W - W-B Power source of ECM Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A13-31 (IMI) - E3-1 (E1) L - W-B ID code box input signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  b waveform 1)
      A13-30 (IMO) - E3-1 (E1) B - W-B ID code box output signal Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation (see  c waveform 2)
    2. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) A13-31 (IMI) - E3-1 (E1)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
      Fig 13: Oscilloscope Waveform Referrence Graph 1
      G04944581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference): 

      WAVEFORM REFERRENCE CHART

      Item Content
      Terminal No. (Symbols) A13-30 (IMO) - E3-1 (E1)
      Tool Setting 10 V/DIV., 100 msec./DIV.
      Condition Engine switch on (IG)
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