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Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER 
    Fig 1: Identifying D32 Connector
    G02977206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D32 amplifier connector.
    2. Measure the resistance between the terminal of the wire harness side connector and body ground.

      Standard: 

      RESISTANCE SPECIFIED CONDITION SPECIFICATION (D32 CONNECTOR DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (D32-7) - 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 D32 amplifier connector.
    4. Measure the voltage and resistance of the connector.

      Standard: 

      VOLTAGE/RESISTNCE SPECIFIED CONDITION SPECIFICATION (D32 CONNECTOR CONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      VC5 (D32-1) - AGND (D32-7) W - V Power source No key in ignition key cylinder --> Key inserted 0 V -->4.6 to 5.4 V
      CODE (D32-4) - AGND (D32-7) LG - V Demodulated signal of key code data No key in ignition key cylinder --> Key inserted Pulse generation (see Fig 2 )
      TXCT (D32-5) - AGND (D32-7) BR - V Key code output signal No key in ignition key cylinder --> Key inserted Pulse generation (see Fig 3 )

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

    5. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      Fig 2: Identifying Waveform 1
      G02977207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 REFERENCE

      Terminal CODE - GND
      Tool Setting 10 V/DIV., 20 ms/DIV.
      Condition No key in ignition key cylinder --> Key inserted

      Waveform 2 (Reference): 

      Fig 3: Identifying Waveform 2
      G02977208Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 REFERENCE

      Terminal TXCT - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition No key in ignition key cylinder --> Key inserted
  2. CHECK TRANSPONDER KEY ECU ASSY 
    Fig 4: Identifying Connector D33 - Transponder Key ECU Assy
    G02977209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D33 ECU connector, and measure the voltage and resistance between each terminal of the wire harness side connector.

      Standard: 

      VOLTAGE/RESISTANCE SPECIFIED CONDITION SPECIFICATION (D33 CONNECTOR DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B (D33-1) - GND (D33-16) Y - W-B Battery Always 10 to 14 V
      IG (D33-2) - AGND (D33-5) G - V Ignition switch Ignition switch OFF --> ON Below 1 V --> 10 to 14 V
      GND (D33-16) - 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.

    2. Reconnect the D33 ECU connector, and measure the voltage between each terminal of the connector.

      Standard: 

      VOLTAGE SPECIFIED CONDITION SPECIFICATION (D33 CONNECTOR CONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      KSW (D33-3) - GND (D33-16) B - W-B Unlock warning switch No key in ignition key cylinder --> Key inserted 10 to 14 V --> Below 1 V
      TXCT (D33-4) - AGND (D33-5) BR - V Transponder key amplifier communication signal Ignition switch ON Fig 5
      CTY (D33-7) - GND (D33-16) L - W-B Courtesy signal Driver side door is open --> closed 10 to 14 V --> Below 1 V
      IND (D33-8) - GND (D33-16) P - W-B Security indicator signal Engine immobilizer system SET --> UNSET 3 to 5 V --> Below 1 V
      D (D33-9) - GND (D33-16) O - W-B Diagnosis tester communication Ignition switch ON Pulse generation
      EFII (D33-12) - GND (D33-16) L - W-B ECM input signal Ignition switch ON Fig 8
      EFIO (D33-13) - GND (D33-16) BR - W-B ECM output signal Ignition switch ON Fig 7
      VC5 (D33-14) - AGND (D33-5) W - V Power source Ignition switch OFF --> ON Below 1 V --> 4.6 to 5.4 V
      CODE (D33-15) - AGND (D33-5) LG - V Transponder key amplifier ground Ignition switch ON Fig 6

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

    3. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      Fig 5: Identifying Waveform 1
      G02977210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 REFERENCE

      Terminal TXCT - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch ON

      Waveform 2 (Reference): 

      Fig 6: Identifying Waveform 2
      G02977211Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 REFERENCE

      Terminal ODE - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch ON

      Waveform 3 (Reference): 

      Fig 7: Identifying Waveform 3
      G02977212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 3 REFERENCE

      Terminal FIO - GND
      Tool Setting 10 0 V/DIV., 500 ms/DIV.
      Condition Ignition switch ON

      Waveform 4 (Reference): 

      Fig 8: Identifying Waveform 4
      G02977213Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 4 REFERENCE

      Terminal FII - GND
      Tool Setting 10 0 V/DIV., 500 ms/DIV.
      Condition Ignition switch ON
    4. Measure the resistance between each terminal of the connector.

      Standard: 

      SPECIFIED CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AGND (D33-5) - GND (D33-16) V - W-B Amplifier ground circuit Always Below 1 Ω

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

  3. CHECK ECM 
    Fig 9: Identifying ECM Connector Terminals
    G02977214Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the B45 and D41 ECM connectors.
    2. Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.

      Standard: 

      SPECIFIED CONDITION SPECIFICATION (ECM CONNECTOR DISCONNECTED)

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      IMO (D41-15) - E01 (B45-7) BR - W-B Transponder key ECU input signal No key in ignition key cylinder --> Key inserted Pulse generation (see Fig 10 )
      IMI (D41-16) - E01 (B45-7) L - W-B Transponder key ECU output signal No key in ignition key cylinder --> Key inserted Pulse generation (see Fig 11 )
      E01 (B45-7) - 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. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      Fig 10: Identifying Waveform 1
      G02977215Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 REFERENCE

      Terminal IMI - GND
      Tool Setting 10 V/DIV., 500 ms/DIV.
      Condition No key in ignition key cylinder --> Key inserted

      Waveform 2 (Reference): 

      Fig 11: Identifying Waveform 2
      G02977216Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 REFERENCE

      Terminal MO - GND
      Tool Setting 10 V/DIV., 500 ms/DIV.
      Condition No key in ignition key cylinder --> Key inserted
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