Engine Immobiliser System Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER

  1. CHECK TRANSPONDER KEY ECU

  1. CHECK ECM (1GR-FE)

  1. CHECK ECM (1KD-FTV)

Engine Immobiliser System -- Terminals Of Ecu



CHECK TRANSPONDER KEY AMPLIFIER

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  1. Disconnect the T20 amplifier connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (T20-7) - Body ground
    		L-O - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the T20 amplifier connector.

  4. Measure the resistance and voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (T20-7) - Body ground
    		L-O - Body ground
    		Ground
    		Always
    		Below 1 Ω
    VC5 (T20-1) - AGND (T20-7)
    		L - L-O
    		Power source
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted
    		4.6 to 5.4 V
    CODE (T20-4) - AGND (T20-7)
    		L-Y - L-O
    		Demodulated signal of key code data
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted
    		Pulse generation (see waveform 1)
    TXCT (T20-5) - AGND (T20-7)
    		L-B - L-O
    		Key code output signal
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted
    		Pulse generation (see waveform 2)
    1. If the result is not as specified, the amplifier may have a malfunction.


    5. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  5. Using an oscilloscope, check waveform 1.

    Waveform 1 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		CODE (T20-4) - AGND (T20-7)
    Tool Setting
    		2 V/DIV., 20 msec./DIV.
    Condition
    		Key inserted


    6. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  6. Using an oscilloscope, check waveform 2.

    Waveform 2 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		TXCT (T20-5) - AGND (T20-7)
    Tool Setting
    		2 V/DIV., 20 msec./DIV.
    Condition
    		Key inserted

CHECK TRANSPONDER KEY ECU

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  1. Disconnect the T21 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (T21-5) - Body ground
    		L-O - Body ground
    		Ground
    		Always
    		Below 1 Ω
    GND (T21-16) - Body ground
    		G - Body ground
    		Ground
    		Always
    		Below 1 Ω
    +B (T21-1) - GND (T21-16)
    		L-Y - G
    		Power source supply
    		Always
    		10 to 14 V
    IG (T21-2) - GND (T21-16)
    		B-O - G
    		Ignition power supply
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		10 to 14 V
    KSW (T21-3) - GND (T21-16)
    		BR - G
    		Unlock warning switch
    		No key in ignition key cylinder
    		10 kΩ or higher
    Key inserted
    		Below 1 Ω
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the T21 ECU connector.

  4. Measure the voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    VC5 (T21-14) - AGND (T21-5)
    		L - L-O
    		Power source of transponder key amplifier
    		No key in ignition key cylinder
    		Below 1 V
    Key is inserted
    		4.6 to 5.4 V
    CODE (T21-15) - AGND (T21-5)
    		L-Y - L-O
    		Transponder key amplifier communication signal
    		No key in ignition key cylinder
    		Below 1 V
    Key is inserted
    		Pulse generation (see waveform 1)
    TXCT (T21-4) - AGND (T21-5)
    		L-B - L-O
    		Transponder key amplifier communication signal
    		No key in ignition key cylinder
    		Below 1 V
    Key is inserted
    		Pulse generation (see waveform 2)
    EFIO (T21-13) - E (T21-11)
    		Y-G - W-B
    		ECM output signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 3)
    EFII (T21-12) - E (T21-11)
    		Y-B - W-B
    		ECM input signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 4)
    1. If the result is not as specified, the ECU may have a malfunction.


    5. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  5. Using an oscilloscope, check waveform 1.

    Waveform 1 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		CODE (T21-15) - AGND (T21-5)
    Tool Setting
    		2 V/DIV., 20 msec./DIV.
    Condition
    		Key inserted


    6. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  6. Using an oscilloscope, check waveform 2.

    Waveform 2 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		TXCT (T21-4) - AGND (T21-5)
    Tool Setting
    		2 V/DIV., 20 msec./DIV
    Condition
    		Key inserted


    7. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  7. Using an oscilloscope, check waveform 3.

    Waveform 3 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		EFIO (T21-13) - EOM (T21-11)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON


    8. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  8. Using an oscilloscope, check waveform 4.

    Waveform 4 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		EFII (T21-12) - EOM (T21-11)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON

CHECK ECM (1GR-FE)

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  1. Measure the voltage and resistance of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IMI (E13-16) - EOM (E13-35)
    		Y-G - W-B
    		Transponder key ECU input signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 1)
    IMO (E13-15) - EOM (E13-35)
    		Y-B -W-B
    		Transponder key ECU output signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 2)
    E01 (E15-7) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E02 (E15-6) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E1 (E17-21) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, the ECM may have a malfunction.


    2. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  2. Using an oscilloscope, check waveform 1.

    Waveform 1 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		IMI (E13-16) - EOM (E13-35)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON


    3. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  3. Using an oscilloscope, check waveform 2.

    Waveform 2 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		IMO (E13-15) - EOM (E13-35)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON

CHECK ECM (1KD-FTV)

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  1. Measure the voltage and resistance of the connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IMI (E5-30) - EOM (E4-16)
    		Y-G - W-B
    		Transponder key ECU input signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 1)
    IMO (E5-29) - EOM (E4-16)
    		Y-B -W-B
    		Transponder key ECU output signal
    		Ignition switch OFF
    		Below 1 V
    Ignition switch ON
    		Pulse generation (see waveform 2)
    E01 (E7-7) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E02 (E7-6) - Body ground
    		W - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E1 (E6-7) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, the ECM may have a malfunction.


    2. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  2. Using an oscilloscope, check waveform 1.

    Waveform 1 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		IMI (E5-30) - EOM (E4-16)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON


    3. Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  3. Using an oscilloscope, check waveform 2.

    Waveform 2 (Reference):
    Item
    		Content
    Symbols (Terminal No.)
    		IMI (E6-30) - EOM (E4-16)
    Tool Setting
    		10 V/DIV., 100 msec./DIV.
    Condition
    		Ignition switch ON