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Terminals Of Ecu

  1. CHECK TRANSPONDER AMPLIFIER 
    Fig 1: Identifying T5 Connector
    G02913434Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 amplifier connector, and measure the resistance between the terminal of the wire harness side connector and body ground.

      Standard: 

      TERMINAL WIRING COLOR SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      GND (T5-7) - Body ground P-B (W) - Body ground Constant Below 1 Ω

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

    2. Reconnect the T5 amplifier connector, and measure the voltage of each terminal of the connector.

      Standard: 

      TERMINAL WIRING COLOR SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      VC5 (T5-1) - GND (T5-7) L-B (W) - P-B (W) No key in ignition key cylinder --> With key 0 V --> Below 5.4 V 14 V
      CODE(T5-4) - GND (T5-7) L-R (W) - P-B (W) No key in ignition key cylinder --> With key Waveform 1
      TXCT (T5-5) - GND (T5-7) P (W) - P-B (W) No key in ignition key cylinder --> With key Waveform 2

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

    3. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      CODE-GND WAVEFORM REFERENCE

      Terminal CODE - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 2: Code - GND Waveform 1
      G02913435Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 2 (Reference): 

      TXT - GND WAVEFORM REFERENCE

      Terminal TXCT - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 3: TXT - GND Waveform 2
      G02913436Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK TRANSPONDER KEY ECU 
    Fig 4: Identifying T11 Connector
    G02913437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T11 ECU connector, and measure the voltage or resistance between each terminal of the wire harness side connector.

      Standard: 

      TERMINAL WIRING COLOR SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      GND (T11-14) - Body ground W-B (W) - Body ground Constant Below 1 Ω
      +B (T11-1) - GND (T11-14) L-Y (W) - W-B (W) Constant 10 to 14 V
      IG (T11-2) - GND (T11-14) B-O (W) - W-B (W) Ignition switch OFF --> ON 0 V --> 10 to 14 V
      KSW (T11-10) - GND (T11-14) L-R (W) - W-B (W) No key in ignition key cylinder --> With key 10 kΩ or higher --> Below 1 Ω
      AGND (T11-13) - Body ground P-B (W) - Body ground Constant Below 1 Ω

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

    2. Reconnect the T11 ECU connector, and measure the voltage between each terminal of the connector.

      Standard: 

      TERMINAL WIRING COLOR SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      IND (T11-3) - GND (T11-14) G-R (W) - W-B (W) During set preparation 10 to 14 V --> 0 V (Waveform)
      CTY (T11-4) - GND (T11-14) R-Y (SB) - W-B (W) Driver side door closed open 10 to 14 V --> Below 1 Ω
      EFIO (T11-6) - GND (T11-14) R-G (W) - W-B (W) No key in ignition key cylinder --> With key Waveform 1
      EFII (T11-7) - GND (T11-14) R (W) - W-B (W) No key in ignition key cylinder --> With key Waveform 2
      VC5 (T11-8) - GND (T11-14) L-B (W) - W-B (W) No key in ignition key cylinder --> With key O V --> Below 5.4 -->--> 0 V
      KSW (T11-10) - GND (T11-14) L-R (W) - W-B (W) No key in ignition key cylinder --> With key 10 to 14 V --> Below 1 Ω
      CODE (T11-11) - GND (T11-14) L-R (W) - W-B (W) No key in ignition key cylinder --> With key Waveform 3
      TXCT (T11-12) - GND (T11-14) P (W) - W-B (W) No key in ignition key cylinder --> With key Waveform 4

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

    3. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      EFO-GND WAVEFORM REFERENCE

      Terminal EFIO - GND
      Tool Setting 5 V/DIV., 5 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 5: EFIO-GND Waveform 1
      G02913438Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 2 (Reference): 

      EFII-GND WAVEFORM REFERENCE

      Terminal EFII - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 6: EFII-GND Waveform 2
      G02913439Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 3 (Reference): 

      CODE-GND WAVEFORM REFERENCE

      Terminal CODE - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 7: CODE-GND Waveform 3
      G02913440Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 4 (Reference): 

      TXCT-GND WAVEFORM REFERENCE

      Terminal TXCT - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 8: TXCT-GND Waveform 4
      G02913441Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK ECM 
    Fig 9: Identifying E6, E5, E4, E7, E8 Connectors
    G02913442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the E4, E5, E7 and E8 ECM connectors, and measure the voltage or resistance between each terminal of the wire harness side connectors.

      Standard: 

      TERMINAL WIRING COLOR SPECIFIED CONDITION

      Symbols (Terminal No.) Wiring Color Condition Specified Condition
      E1 (E4-1) - Body ground BR - Body ground Constant Below 1 Ω
      E02 (E6-6) - Body ground W-B - Body ground Constant Below 1 Ω
      E01 (E6-7) - Body ground W-B - Body ground Constant Below 1 Ω
      IMI (E7-27) - E1 (E4-1) R-G (W) - BR No key in ignition key cylinder --> With key Waveform 1
      IMO (E7-26) - E1 (E4-1) R (W) - BR No key in ignition key cylinder --> With key Waveform 2
      +B (E8-1) - E1 (E4-1) B-R (LG) - BR Constant 9 to 14 V
      BATT (E8-3) - E1 (E4-1) R-W (SB) - BR Constant 9 to 14 V
      EOM (E8-15) - Body ground BR (W) - Body ground Constant Below 1 Ω

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

    2. Inspect using an oscilloscope.

      Waveform 1 (Reference): 

      IMI-GND WAVEFORM REFERENCE

      Terminal IMI - GND
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Key in ignition key cylinder
      Fig 10: IMI-GND Waveform 1
      G02913443Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Waveform 2 (Reference): 

      IMO-GND WAVEFORM REFERENCE

      Terminal IMO - GND
      Tool Setting 5 V/DIV., 5 ms/DIV.
      Condition Constant
      Fig 11: IMO-GND Waveform 2
      G02913444Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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