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Terminals Of Ecu

  1. CHECK ENGINE SWITCH 
    1. Disconnect the J31 engine switch connector.
      Fig 1: Identifying J31 Engine Switch Connector Terminal
      G05754491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J31-8 (AGND) - 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 engine switch connector.
    4. Measure the voltage according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J31-9 (TXCT) - J31-8 (AGND) L - GR Key code output signal Key is not in cabin Below 1 V
      J31-9 (TXCT) - J31-8 (AGND) L - GR Key code output signal Key is held close to engine switch* Pulse generation (See  1waveform 1)
      J31-10 (CODE) - J31-8 (AGND) SB - GR Demodulated signal of key code data Key is not in cabin Below 1 V
      J31-10 (CODE) - J31-8 (AGND) SB - GR Demodulated signal of key code data Key is held close to engine switch* Pulse generation (See  2waveform 2)
      J31-14 (VC5) - J31-8 (AGND) R - GR Power supply Key is not in cabin Below 1 V
      J31-14 (VC5) - J31-8 (AGND) R - GR Power supply Brake pedal is depressed* 4 6 to 5 4 V
      HINT.
      *: Remove the key battery before performing this inspection.

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

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

        Item Content
        Tester Connection J31-9 (TXCT) - J31-8 (AGND)
        Tool Setting 2 V/DIV, 50 ms /DIV
        Condition Key is held close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection.
        Fig 2: Identifying Waveform 1
        G05419562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE

        Item Content
        Tester Connection J31-10 (CODE) - J31-8 (AGND)
        Tool Setting 2 V/DIV, 50 ms /DIV
        Condition Key is held close to engine switch*
        HINT
        * Remove the key battery before performing this inspection.
        Fig 3: Identifying Waveform 2
        G05754493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Disconnect the P33 certification ECU (smart key ECU assembly) connector
      Fig 4: Identifying P33 Certification ECU Connector Terminal
      G05754494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-1 (+B1) - P33-17 (E) L - W-B +B power supply Always 11 to 14 V
      P33-17 (E) - Body ground W-B - 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 P33 certification ECU (smart key ECU assembly) connector
    4. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      P33-8 (TXCT) - P33-40 (AGND) G - LG Engine switch TXCT output Key is not in cabin Below 1 V
      P33-8 (TXCT) - P33-40 (AGND) G - LG Engine switch TXCT output Key is held close to engine switch* Pulse generation (See  1waveform 1)
      P33-9 (CODE) - P33-40 (AGND) GR - LG Engine switch CODE input Key is not in cabin Below 1 V
      P33-9 (CODE) - P33-40 (AGND) GR - LG Engine switch CODE input Key is held close to engine switch* Pulse generation (See  2waveform 2)
      P33-18 (IG) - P33-17 (E) B - W-B Ignition power supply Engine switch off Below 1 V
      P33-18 (IG) - P33-17 (E) B - W-B Ignition power supply Engine switch on (IG) 11 to 14 V
      P33-19 (ACC) - P33-17 (E) O - W-B ACC power supply Engine switch off Below 1 V
      P33-19 (ACC) - P33-17 (E) O - W-B ACC power supply Engine switch on (ACC) 11 to 14 V
      P33-30 (VC5) - P33-40 (AGND) L - LG Engine switch power supply Key is not in cabin Below 1 V
      P33-30 (VC5) - P33-40 (AGND) L - LG Engine switch power supply Brake pedal is depressed* 4 6 to 5 4 V
      P33-40 (AGND) - Body ground LG - Body ground Engine switch ground Always Below 1 Ω
      HINT
      * Remove the key battery before performing this inspection.

      If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction

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

        Item Content
        Tester Connection P33-8 (TXCT) - P33-40 (AGND)
        Tool Setting 2 V/DIV, 50 ms /DIV
        Condition Key is held close to engine switch*
        HINT:
        *: Remove the key battery before performing this inspection
        Fig 5: Identifying Waveform 1
        G05419562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE

        Item Content
        Tester Connection P33-9 (CODE) - P33-40 (AGND)
        Tool Setting 2 V/DIV, 50 ms /DIV
        Condition Key is held close to engine switch*
        HINT
        * Remove the key battery before performing this inspection.
        Fig 6: Identifying Waveform 2
        G05419563Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ID CODE BOX (IMMOBILIZER CODE ECU) 
    1. Disconnect the J69 ID code box (immobilizer code ECU) connector
      Fig 7: Identifying J69 Connector Terminal
      G05754497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J69-1 (+B) - J69-8 (GND) G - W-B +B power supply Always 11 to 14 V
      J69-8 (GND) - Body ground W-B - 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 J69 ID code box (immobilizer code ECU) connector.
    4. Measure the voltage according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J69-5 (EFII) - J69-8 (GND) W - W-B ECM input signal Engine switch off Below 1 V
      J69-5 (EFII) - J69-8 (GND) W - W-B ECM input signal Engine switch on (IG) Pulse generation (See  1waveform 1)
      J69-6 (EFIO) - J69-8 (GND) P - W-B ECM output signal Engine switch off Below 1 V
      J69-6 (EFIO) - J69-8 (GND) P - W-B ECM output signal Engine switch on (IG) Pulse generation (See  2waveform 2)

      If the result is not as specified, the ID code box (immobilizer code ECU) may have a malfunction

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

        Item Content
        Tester Connection J69-5 (EFII) - J69-8 (GND)
        Tool Setting 10 V/DIV, 100 ms/DIV
        Condition Engine switch on (IG)
        Fig 8: Identifying Waveform 1
        G04979930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE

        Item Content
        Tester Connection J69-6 (EFIO) - J69-8 (GND)
        Tool Setting 10 V/DIV, 100 ms/DIV
        Condition Engine switch on (IG)
        Fig 9: Identifying Waveform 2
        G04979931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK STEERING LOCK ECU 
    1. Disconnect the J29 steering lock ECU connector
      Fig 10: Identifying J29 Steering Lock ECU Connector Terminal
      G05754500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J29-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J29-2 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J29-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch off Below 1 V
      J29-6 (IG2) - Body ground LG - Body ground Ignition power supply Engine switch on (IG) 11 to 14 V
      J29-7 (B) - Body ground O - Body ground +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

  5. CHECK POWER SOURCE CONTROL ECU 
    1. Disconnect the J55 power source control ECU connector
      Fig 11: Identifying J55 Power Source Control ECU Connector Terminal
      G05754092Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J55-6 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      J55-12 (AM2) - Body ground O - Body ground +B power supply Always 11 to 14 V
      J55-33 (AM1) - Body ground O - Body ground +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

  6. CHECK ECM 
    1. Disconnect the E6 ECM connector
      Fig 12: Identifying E6 ECM Connector Terminal
      G05754502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E6-1 (E1) - Body ground W-B - 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 E6 ECM connector.
    4. Measure the voltage according to the value (s) in the table below
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A6-30 (IMO) - E6-1 (E1) W-R - W-B ID code box (immobilizer code ECU) output signal Engine switch off Below 1 V
      A6-30 (IMO) - E6-1 (E1) W-R - W-B ID code box (immobilizer code ECU) output signal Engine switch on (IG) Pulse generation (See  1waveform 1)
      A6-31 (IMI) - E6-1 (E1) LG - W-B ID code box (immobilizer code ECU) input signal Engine switch off Below 1 V
      A6-31 (IMI) - E6-1 (E1) LG - W-B ID code box (immobilizer code ECU) input signal Engine switch on (IG) Pulse generation (See  2waveform 2)

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

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

        Item Content
        Tester Connection A6-30 (IMO) - E6-1 (E1)
        Tool Setting 2 V/DIV, 1 s/DIV
        Condition Engine switch on (IG)
        Fig 13: Identifying Waveform 1
        G04979930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        WAVEFORM REFERENCE

        Item Content
        Tester Connection A6-31 (IMI) - E6-1 (E1)
        Tool Setting 2 V/DIV, 1 s /DIV
        Condition Engine switch on (IG)
      6. Fig 14: Identifying Waveform 2
      G04979931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 
    1. Disconnect the RD and RM junction block connectors.
      Fig 15: Identifying RD And RM Junction Block Connector Terminal
      G05754216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value (s) in the table below
      RESISTANCE REFERENCE

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      RD-7 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      RK-5 (BECU) - Body ground G-R - Body ground Battery power supply Always 11 to 14 V
      RN-1 (BATB) - Body ground R - Body ground Battery 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 RD and RM junction block connectors
    4. Measure the voltage according to the value (s) in the table below.
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J74-24 (IND) - Body ground LG - Body ground Indicator light signal Key is not in cabin (immobilizer system is not set) Alternating between 11 to 14 V (0 2 seconds) to below 1 V

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

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