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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER 
    Fig 1: Checking Transponder Key Amplifier Connector
    G02677969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T9 amplifier connector.
    2. Measure the resistance of the wire harness side connector.
      Fig 2: Terminal Specified Condition Chart
      G02677970Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    3. Reconnect the T9 amplifier connector.
    4. Measure the voltage of the connector.
      Fig 3: Measuring Voltage Of Connector
      G02677971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    5. Inspect using an oscilloscope.
    TERMINAL DESCRIPTION CHART

    Terminal CODE-GND
    Tool Setting 2 V/DIV., 20 ms/DIV.
    Condition No key in ignition key cylinder --> key inserted
    Fig 4: Identifying Waveform 1 Graph
    G02677972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL TXCT-GND CHART

    Terminal TXCT-GND
    Tool Setting 2 V/DIV., 20 ms/DIV.
    Condition No key in ignition key cylinder --> key inserted
    Fig 5: Identifying Waveform 2 Graph
    G02677973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK TRANSPONDER KEY ECU ASSY 
    Fig 6: Identifying Transponder Key ECU Assy Terminal Connector
    G02677974Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T10 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      Fig 7: Terminal Specified Condition Chart (1 Of 2)
      G02677975Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    3. Reconnect the T10 ECU connector.
    4. Measure the voltage of the connector.
      Fig 8: Terminal Specified Condition Chart (2 Of 2)
      G02677976Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

    5. Inspect using an oscilloscope.
    TERMINAL TXCT-AGND CHART

    Terminal TXCT-AGND
    Tool Setting 2V/DIV., 10ms/DIV.
    Condition No key in ignition key cylinder --> key inserted
    Fig 9: Identifying Waveform 1 Graph Chart
    G02677977Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL CODE-AGND CHART

    Terminal CODE-AGND
    Tool Setting 2 V/DIV, 20 ms/DIV.
    Condition No key in ignition key cylinder --> key inserted
    Fig 10: Identifying Waveform 2 Graph Chart
    G02677978Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL EFIO-GND

    Terminal EFIO-GND
    Tool Setting 10 V/DIV., 100 ms/DIV.
    Condition Ignition switch OFF --> ON
    Fig 11: Identifying Waveform 3 Graph Chart
    G02677979Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL EFII-GND

    Terminal EFII-GND
    Tool Setting 10 V/DIV, 100 ms/DIV.
    Condition Ignition switch OFF --> ON
    Fig 12: Identifying Waveform 4 Graph Chart
    G02677980Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ECM 
    Fig 13: Identifying ECM Terminal
    G02677981Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the resistance and voltage of the connectors.
      Fig 14: Measuring Resistance And Voltage Of Connectors
      G02677982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      *1: 1ZZ-FE 4WD

      *2: Except 1ZZ-FE 4WD

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

    2. Inspect using an oscilloscope.
    TERMINAL IMO-EOM CHART

    Terminal IMO-EOM
    Tool Setting 10V/DIV., 100ms/DIV.
    Condition Ignition switch ON
    Fig 15: Identifying Waveform 1 Graph Chart
    G02677983Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 16: Identifying Waveform 2 Graph Chart
    G02677984Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL IMI-EOM CHART

    Terminal IMI-EOM
    Tool Setting 10V/DIV., 100ms/DIV.
    Condition Ignition switch ON
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