Engine Immobiliser System Terminals Of Ecu

  1. CHECK TRANSPONDER KEY AMPLIFIER

  1. CHECK TRANSPONDER KEY ECU ASSEMBLY

  1. CHECK ECM (for 1GR-FE)

  1. CHECK ECM (for 2TR-FE)

  1. CHECK ECM (for 1KD-FTV, 2KD-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. Measure the resistance and voltage according to the value(s) in the table below.

    Inspection with Ignition Switch Off
    Terminal No. (Symbol)
    		Input/Output
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    		Related Data List Item/DTC
    T20-7 (AGND) - Body ground
    		-
    		L-O - Body ground
    		Ground
    		Always
    		Below 1 Ω
    		-
    T20-1 (VC5) - T20-7 (AGND)
    		Input
    		L - L-O
    		Transponder key amplifier power supply
    		No key in ignition key cylinder
    		Below 1 V
    		-
    T20-4 (CODE) - T20-7 (AGND)
    		Output
    		L-Y - L-O
    		Demodulated signal of key code data
    		No key in ignition key cylinder
    		Below 1 V
    		-
    T20-5 (TXCT) - T20-7 (AGND)
    		Input
    		L-B - L-O
    		Key code output signal
    		No key in ignition key cylinder
    		Below 1 V
    		-
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

    Inspection of Waveforms of Communication Signals between Transponder Key Amplifier and Transponder Key ECU Assembly
    Terminal No. (Symbol)
    		Input/Output
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    		Related Data List Item/DTC
    T20-1 (VC5) - T20-7 (AGND)
    		Input
    		L - L-O
    		Transponder key amplifier power supply
    		No key in ignition key cylinder
    		Below 1 V
    1. BCC Malfunction
    2. Abnormal Status
    3. Different Encrypt Code
    4. Different Serial Number
    (If immobiliser key code certification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above)
    Key inserted in ignition key cylinder
    		4.6 to 5.4 V
    T20-4 (CODE) - T20-7 (AGND)
    		Output
    		L-Y - L-O
    		Demodulated signal of key code data
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted in ignition key cylinder
    		Pulse generation (See waveform 1)
    T20-5 (TXCT) - T20-7 (AGND)
    		Input
    		L-B - L-O
    		Key code output signal
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted in ignition key cylinder
    		Pulse generation (See waveform 2)
    1. If the result is not as specified, the amplifier 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. Inspect using an oscilloscope.

    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

    1. Waveform 1 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T20-4 (CODE) - T20-7 (AGND)
      Tool Setting
      		5 V/DIV., 20 ms./DIV.
      Condition
      		Key inserted in ignition key cylinder


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

    2. Waveform 2 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T20-5 (TXCT) - T20-7 (AGND)
      Tool Setting
      		5 V/DIV., 20 ms./DIV.
      Condition
      		Key inserted in ignition key cylinder

CHECK TRANSPONDER KEY ECU ASSEMBLY
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Engine Immobiliser.Engine Immobiliser System.Engine Immobiliser System Terminals Of Ecu

  1. Disconnect the T21 transponder key ECU assembly connector.

  2. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Input/Output
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    		Related Data List Item/DTC
    T21-16 (GND) - Body ground
    		-
    		G - Body ground
    		Ground
    		Always
    		Below 1 Ω
    		-
    T21-1 (+B) - T21-16 (GND)
    		Input
    		L-Y - G
    		Battery
    		Always
    		11 to 14 V
    		+B
    T21-2 (IG) - T21-16 (GND)
    		Input
    		B-O - G
    		Ignition switch
    		Ignition switch off
    		Below 1 V
    		IG SW
    Ignition switch ON
    		11 to 14 V
    T21-3 (KSW) - T21-16 (GND)
    		Input
    		BR - G
    		Unlock warning switch
    		No key in ignition key cylinder
    		10 kΩ or higher
    		Key SW/B2780
    Key inserted in ignition key cylinder
    		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 transponder key ECU assembly connector.

  4. Measure the resistance and voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Input/Output
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    		Related Data List Item/DTC
    T21-14 (VC5) - T21-16 (GND)
    		Input
    		L - G
    		Transponder key amplifier power supply
    		No key in ignition key cylinder
    		Below 1 V
    1. BCC Malfunction
    2. Abnormal Status
    3. Different Encrypt Code
    4. Different Serial Number
    (If immobiliser key code certification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above)
    Key inserted in ignition key cylinder
    		4.6 to 5.4 V
    T21-4 (TXCT) - T21-16 (GND)
    		Input
    		L-B - G
    		Key code output signal
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted in ignition key cylinder
    		Pulse generation (See waveform 1)
    T21-15 (CODE) - T21-16 (GND)
    		Output
    		L-Y - G
    		Demodulated signal of key code data
    		No key in ignition key cylinder
    		Below 1 V
    Key inserted in ignition key cylinder
    		Pulse generation (See waveform 2)
    T21-7 (CTY) - T21-16 (GND)
    		Input
    		R-B - G
    		Front door courtesy light switch (for Driver Side)
    		Driver door closed
    		10 kΩ or higher
    		D Door Courtesy SW
    Driver door open
    		Below 1 Ω
    T21-13 (EFIO) - T21-16 (GND)
    		Input
    		Y-G - G
    		ECM output signal
    		Ignition switch off
    		Below 1 V
    		E/G Start Permission
    Ignition switch ON
    		Pulse generation (See waveform 3)
    T21-12 (EFII) - T21-16 (GND)
    		Output
    		Y-B - G
    		ECM input signal
    		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected
    		Pulse generation (See waveform 4)
    		E/G Start Permission
    T21-8 (IND) - T21-16 (GND)
    		Output
    		G-R - G
    		Security indicator light signal
    		Immobiliser set
    		Alternating between 11 to 14 V and below 1 V
    		-
    Immobiliser unset
    		Below 1 V
    T21-9 (D) - T21-16 (GND)
    		Input/Output
    		B - G
    		Diagnosis tester communication
    		Always
    		Pulse generation
    		-
    T21-5 (AGND) - Body ground
    		-
    		L-O - Body ground
    		Transponder key amplifier ground
    		Always
    		Below 1 Ω
    		-
    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. Inspect using an oscilloscope.

    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

    1. Waveform 1 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T21-4 (TXCT) - T21-16 (GND)
      Tool Setting
      		5 V/DIV., 20 ms./DIV.
      Condition
      		Key inserted in ignition key cylinder


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

    2. Waveform 2 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T21-15 (CODE) - T21-16 (GND)
      Tool Setting
      		5 V/DIV., 20 ms./DIV.
      Condition
      		Key inserted in ignition key cylinder


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

    3. Waveform 3 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T21-13 (EFIO) - T21-16 (GND)
      Tool Setting
      		10 V/DIV., 100 ms./DIV.
      Condition
      		Ignition switch ON


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

    4. Waveform 4 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		T21-12 (EFII) - T21-16 (GND)
      Tool Setting
      		5 V/DIV., 500 ms./DIV.
      Condition
      		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned to ON after battery disconnected and reconnected

CHECK ECM (for 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 according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E13-15 (IMO) - Body ground
    		Y-B - Body ground
    		Transponder key ECU assembly output signal
    		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.
    		Pulse generation (See waveform 1)
    E13-16 (IMI) - Body ground
    		Y-G -Body ground
    		Transponder key ECU assembly input signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		Pulse generation (See waveform 2)
    1. If the result is not as specified, the ECM may have a malfunction.


  2. Inspect using an oscilloscope.

    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.



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

    1. Waveform 1 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E13-15 (IMO) - Body ground
      Tool Setting
      		5 V/DIV., 500 ms./DIV.
      Condition
      		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.


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

    2. Waveform 2 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E13-16 (IMI) - Body ground
      Tool Setting
      		10 V/DIV., 100 ms./DIV.
      Condition
      		Ignition switch ON

CHECK ECM (for 2TR-FE)

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

  1. Measure the voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E9-15 (IMO) - Body ground
    		Y-B - Body ground
    		Transponder key ECU assembly output signal
    		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.
    		Pulse generation (See waveform 1)
    E9-16 (IMI) - Body ground
    		Y-G -Body ground
    		Transponder key ECU assembly input signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		Pulse generation (See waveform 2)
    1. If the result is not as specified, the ECM may have a malfunction.


  2. Inspect using an oscilloscope.

    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.



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

    1. Waveform 1 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E9-15 (IMO) - Body ground
      Tool Setting
      		5 V/DIV., 500 ms./DIV.
      Condition
      		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.


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

    2. Waveform 2 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E9-16 (IMI) - Body ground
      Tool Setting
      		10 V/DIV., 100 ms./DIV.
      Condition
      		Ignition switch ON

CHECK ECM (for 1KD-FTV, 2KD-FTV)

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

  1. Measure the voltage according to the value(s) in the table below.

    Terminal No. (Symbol)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E5-29 (IMO) - Body ground
    		Y-B - Body ground
    		Transponder key ECU assembly output signal
    		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.
    		Pulse generation (See waveform 1)
    E5-30 (IMI) - Body ground
    		Y-G -Body ground
    		Transponder key ECU assembly input signal
    		Ignition switch off
    		Below 1 V
    Ignition switch ON
    		Pulse generation (See waveform 2)
    1. If the result is not as specified, the ECM may have a malfunction.


  2. Inspect using an oscilloscope.

    HINT:
    The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.



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

    1. Waveform 1 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E5-29 (IMO) - Body ground
      Tool Setting
      		5 V/DIV., 500 ms./DIV.
      Condition
      		Within 3 seconds after starter operates and initial combustion occurs, or within 3 seconds after ignition switch first turned ON after battery disconnected and connected.


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

    2. Waveform 2 (Reference)

      Measurement Condition
      Item
      		Content
      Tester Connection
      		E5-30 (IMI) - Body ground
      Tool Setting
      		10 V/DIV., 100 ms./DIV.
      Condition
      		Ignition switch ON