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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER 
    1. Disconnect the E47 transponder key amplifier connector.
      Fig 1: Identifying E47 Transponder Key Amplifier Connector Terminal
      G06036456Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.
      VOLTAGE SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E47-7 (AGND) - 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 E47 transponder key amplifier 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
      E47-1 (VC5) - E47-7 (AGND) G-V Power source No key is in ignition key cylinder Below 1 V
      E47-1 (VC5) - E47-7 (AGND) G-V Power source Key is in ignition key cylinder 4.6 to 5.4 V
      E47-4 (CODE) - E47-7 (AGND) SB-V Demodulated signal of key code data No key is in ignition key cylinder Below 1 V
      E47-4 (CODE) - E47-7 (AGND) SB-V Demodulated signal of key code data Key is in ignition key cylinder Waveform 1
      E47-5 (TXCT) - E47-7 (AGND) BE-V Key code output signal No key is in ignition key cylinder Below 1 V
      E47-5 (TXCT) - E47-7 (AGND) BE-V Key code output signal Key is in ignition key cylinder Waveform 2

      If the result is not as specified, the transponder key amplifier may have a malfunction.

    5. Inspect using an oscilloscope.
      1. Waveform 1 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E47-4 (CODE) - E47-7 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Key is in ignition key cylinder
        Fig 2: Identifying Waveform 1
        G04979967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E47-5 (TXCT) - E47-7 (AGND)
        Tool Setting 2 V/DIV., 10 ms./DIV.
        Condition Key is in ignition key cylinder
  2. CHECK TRANSPONDER KEY ECU ASSEMBLY 
    1. Disconnect the E29 transponder key ECU assembly connector.
      Fig 3: Identifying Waveform 2
      G04979968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 4: Identifying E29 Transponder Key ECU Assembly Connector Terminal
      G06036459Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance and voltage according to the value(s) in the table below.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E29-16 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      E29-1 (+B) - E29-16 (GND) BR-BR Battery Always 11 to 14 V
      E29-2 (IG) - E29-16 (GND) B-BR Ignition switch signal Ignition switch off Below 1 V
      E29-2 (IG) - E29-16 (GND) B-BR Ignition switch signal Ignition switch ON 11 to 14 V
      E29-3 (KSW) - E29-16 (GND) L-BR Unlock warning switch signal No key is in ignition key cylinder 10 kΩ or higher
      E29-3 (KSW) - E29-16 (GND) L-BR Unlock warning switch signal Key is in ignition key cylinder Below 1 Ω

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

    3. Reconnect the E29 transponder key ECU assembly connector.
    4. Measure the resistance and voltage according to the value (s) in the table below.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E29-5 (AGND) - Body ground V - Body ground Ground Always Below 1 Ω
      E29-3 (KSW) - E29-16 (GND) L-BR Unlock warning switch signal No key is in ignition key cylinder 11 to 14 V
      E29-3 (KSW) - E29-16 (GND) L-BR Unlock warning switch signal Key is in ignition key cylinder Below 1 V
      E29-14 (VC5) - E29-5 (AGND) G-V Power source No key is in ignition key cylinder Below 1 V
      E29-14 (VC5) - E29-5 (AGND) G-V Power source Key is in ignition key cylinder 4.6 to 5.4 V
      E29-4 (TXCT) - E29-5 (AGND) BE-V Transponder key amplifier communication signal No key is in ignition key cylinder Below 1 V
      E29-4 (TXCT) - E29-5 (AGND) BE-V Transponder key amplifier communication signal Key is in ignition key cylinder Waveform 1
      E29-15 (CODE) - E29-5 (AGND) SB-V Transponder key amplifier communication signal No key is in ignition key cylinder Below 1 V
      E29-15 (CODE) - E29-5 (AGND) SB-V Transponder key amplifier communication signal Key is in ignition key cylinder Waveform 2
      E29-13 (EFIO) - E29-16 (GND) P-V ECM output signal Ignition switch off Below 1 V
      E29-13 (EFIO) - E29-16 (GND) P-V ECM output signal Ignition switch ON Waveform 3
      E29-12 (EFII) - E29-16 (GND) LG-V ECM input signal Ignition switch off Below 1 V
      E29-12 (EFII) - E29-16 (GND) LG-V ECM input signal Ignition switch ON Waveform 4
      E29-9 (D) - E29-16 (GND) W-V Diagnostic tester communication Without communication Below 1 V
      E29-9 (D) - E29-16 (GND) W-V Diagnostic tester communication During communication Pulse generation
      E29-7 (CTY) - E29-16 (GND) R-V Door courtesy signal Switch pushed 11 to 14 V
      E29-7 (CTY) - E29-16 (GND) R-V Door courtesy signal Switch free Below 1 V
      E29-8 (IND) - E29-16 (GND) Y-V Security indicator signal Security indicator light is on 11 to 14 V
      E29-8 (IND) - E29-16 (GND) Y-V Security indicator signal Security indicator light is off Below 1 V

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

    5. Inspect using an oscilloscope.
      1. Waveform 1 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E29-4 (TXCT) - E29-5 (AGND)
        Tool Setting 2 V/DIV., 10 ms./DIV.
        Condition Key is in ignition key cylinder
        Fig 5: Identifying Waveform 1
        G04979968Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E29-15 (CODE) - E29-5 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Key is in ignition key cylinder
        Fig 6: Identifying Waveform 2
        G04979967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Waveform 3 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E29-13 (EFIO) - E29-16 (GND)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON
        Fig 7: Identifying Waveform 3
        G04979972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Waveform 4 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection E29-12 (EFII) - E29-16 (GND)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON
  3. CHECK ECM 
    1. Disconnect the B29 ECM connector.
      Fig 8: Identifying Waveform 4
      G05419602Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 9: Identifying B29 ECM Connector Terminal
      G06036464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      B29-104 (E1) - Body ground BR - 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 B29 ECM connector.
    4. Measure the voltage according to the value (s) in the table below.
      TESTER CONNECTION SPECIFICATION

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A37-11 (IMI) - B29-104 (E1) P-BR Transponder key ECU input signal Ignition switch off Below 1 V
      A37-11 (IMI) - B29-104 (E1) P-BR Transponder key ECU input signal Ignition switch ON Waveform 1
      A37-10 (IMO) - B29-104 (E1) LG-B - BR Transponder key ECU output signal Ignition switch off Below 1 V
      A37-10 (IMO) - B29-104 (E1) LG-B - BR Transponder key ECU output signal Ignition switch ON Waveform 2

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

    5. Inspect using an oscilloscope.
      1. Waveform 1 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection A37-11 (IMI) - B29-104 (E1)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON
        Fig 10: Identifying Waveform 1
        G04979972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2 (Reference)
        TESTER CONNECTION SPECIFICATION

        Tester Connection A37-10 (IMO) - B29-104 (E1)
        Tool Setting 2 V/DIV., 1 s./DIV.
        Condition Ignition switch ON
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