Engine Immobiliser System (For Sedan) Terminals Of Ecu

Vehicle Interior. Yaris. Ncp93, 131
Theft Deterrent Keyless Entry. Yaris. Ncp93, 131

  1. CHECK TRANSPONDER KEY AMPLIFIER

  1. CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. CHECK ECM

Engine Immobiliser System (For Sedan) -- Terminals Of Ecu



CHECK TRANSPONDER KEY AMPLIFIER

Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

  1. Disconnect the D24 transponder key amplifier connector.

  2. Measure the resistance of the wire harness side connector.

    Standard resistance
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (D24-7) - 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 D24 transponder key amplifier connector.

  4. Measure the resistance and voltage of the connector.

    Standard
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    VC5 (D24-1) - AGND (D24-7)
    		P- GR
    		Power source
    		1: No key in ignition key cylinder →
    2: Key inserted
    		1: 0 V →
    2: 4.6 to 5.4 V
    CODE (D24-4) - AGND (D24-7)
    		G- GR
    		Demodulated signal of key code data
    		No key in ignition key cylinder →
    Key inserted
    		Pulse generation
    (see waveform 1)
    TXCT (D24-5) - AGND (D24-7)
    		V- GR
    		Key code output signal
    		1: No key in ignition key cylinder →
    2: Key inserted
    		Pulse generation
    (see waveform 2)
    AGND (D24-7) - Body ground
    		GR- Body ground
    		Ground
    		Always
    		Below 1 Ω
    If the result is not as specified, there may be a malfunction in the amplifier.


  5. Inspect using an oscilloscope.



      Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    1. Waveform 1

      Terminal
      		CODE (D24-4) - AGND (D24-7)
      Tool Setting
      		5 V/DIV., 20 ms/DIV.
      Condition
      		No key in ignition key cylinder →
      Key inserted


      2. Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    2. Waveform 2

      Terminal
      		TXCT (D24-5) - AGND (D24-7)
      Tool Setting
      		5 V/DIV., 20 ms/DIV.
      Condition
      		No key in ignition key cylinder →
      Key inserted

CHECK TRANSPONDER KEY ECU ASSEMBLY

Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

  1. Disconnect the D23 transponder key ECU connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Standard
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND (D23-16) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    +B (D23-1) - GND (D23-16)
    		L - W-B
    		Battery
    		Always
    		11 to 14 V
    IG (D23-2) - GND (D23-16)
    		R - W-B
    		Ignition switch
    		Ignition switch
    1: OFF →
    2: Key inserted
    		1: 0 V →
    2: 11 to 14 V
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the D23 transponder key ECU connector.

  4. Measure the voltage of the connector.

    Standard voltage
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    KSW (D23-3) - AGND (D23-5)
    		BE - GR
    		Unlock warning switch
    		1: No key in ignition key cylinder →
    2: Key inserted
    		1: 11 to 14 V→
    2: Below 1 V
    VC5 (D23-14) - AGND (D23-5)
    		P - GR
    		Power source
    		1: No key in ignition key cylinder →
    2: Key inserted
    		1: 0 V →
    2: 4.6 to 5.4 V
    TXCT (D23-4) - AGND (D23-5)
    		V - GR
    		Transponder key amplifier communication signal
    		1: No key in ignition key cylinder →
    2: Key inserted
    		Pulse generation
    (see waveform 1)
    CODE (D23-15) - AGND (D23-5)
    		G - GR
    		Transponder key amplifier communication signal
    		1: No key in ignition key cylinder →
    2: Key inserted
    		Pulse generation
    (see waveform 2)
    EFIO (D23-13) - GND (D23-16)
    		W - W-B
    		ECM output signal
    		Ignition switch
    OFF →
    ON
    		Pulse generation
    (see waveform 3)
    EFII (D23-12) - GND (D23-16)
    		BE - W-B
    		ECM input signal
    		Ignition switch
    OFF →
    ON
    		Pulse generation
    (see waveform 4)
    CTY (D23-7) - GND (D23-16)
    		B - W-B
    		Courtesy signal
    		1: Driver side door open →
    2: closed
    		1: 11 to 14 V →
    2: Below 1 V
    IND (D23-8) - GND (D23-16)
    		LG - W-B
    		Security indicator signal
    		Engine immobiliser system
    1: SET →
    2: UNSET
    		1: 3 to 5 V →
    2: Below 1 V
    D (D23-9) - GND (D23-16)
    		W - W-B
    		Diagnosis tester communication
    		Ignition switch ON
    		Pulse generation
    If the result is not as specified, there may be a malfunction in the ECU.


  5. Inspect using an oscilloscope.



      Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    1. Waveform 1

      Terminal
      		TXCT (D23-4) - AGND (D23-5)
      Tool Setting
      		5 V/DIV., 20 ms/DIV.
      Condition
      		Ignition switch
      1: No key in ignition key cylinder →
      2: Key inserted


      2. Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    2. Waveform 2

      Terminal
      		CODE (D23-15) - AGND (D23-5)
      Tool Setting
      		5 V/DIV., 20 ms/DIV.
      Condition
      		Ignition switch
      1: No key in ignition key cylinder →
      2: Key inserted


      3. Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    3. Waveform 3

      Terminal
      		EFIO (D23-13) - GND (D23-16)
      Tool Setting
      		10 V/DIV., 500 ms/DIV.
      Condition
      		Ignition switch
      OFF →
      ON


      4. Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    4. Waveform 4

      Terminal
      		EFII (D23-12) - GND (D23-16)
      Tool Setting
      		10 V/DIV., 500 ms/DIV.
      Condition
      		Ignition switch
      OFF →
      ON

  6. Measure the resistance between each pair of connector terminal.

    Standard resistance
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (D23-5) - GND (D23-16)
    		GR - W-B
    		Amplifier ground circuit
    		Always
    		Below 1 Ω

CHECK ECM

Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

  1. Disconnect the A21 ECM connector.

  2. Measure the voltage and resistance of the wire harness side connector.

    Standard
    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IMI (A21-11) - E1 (C20-104)
    		W - W
    		Transponder key ECU input signal
    		Ignition switch off
    		Below 1 V
    Ignition switch on
    		Pulse generation
    (see waveform 1)
    IMO (A21-10) - E1 (C20-104)
    		BE - W
    		Transponder key ECU output signal
    		Ignition switch off
    		11 to 14 V
    Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.
    		Pulse generation
    (see waveform 2)
    E1 (C20-104) - Body ground
    		W - 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 A21 ECU connector.



  4. Inspect using an oscilloscope.



      Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan).Engine Immobiliser System (For Sedan) Terminals Of Ecu

    1. Waveform 1

      Terminal
      		IMI (A21-11) - E1 (C20-104)
      Tool Setting
      		10 V/DIV., 500 ms/DIV.
      Condition
      		Ignition switch on


      2. Yaris. Ncp93, 131

    2. Waveform 2

      Terminal
      		IMO (A21-10) - E1 (C20-104)
      Tool Setting
      		5 V/DIV., 500 ms/DIV.
      Condition
      		Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.