Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

Securities. Lexus Is250, Is220D. Gse20 Ale20
Engine Immobiliser. Lexus Is250, Is220D. Gse20 Ale20

  1. CHECK ENGINE SWITCH

  1. CHECK CERTIFICATION ECU

  1. CHECK ID CODE BOX

  1. CHECK POWER SOURCE CONTROL ECU

  1. CHECK STEERING CONTROL ECU

  1. CHECK ECM

  1. CHECK MAIN BODY ECU RH (COWL SIDE J/B RH)

Engine Immobiliser System (For 2Ad-Fhv) -- Terminals Of Ecu



CHECK ENGINE SWITCH

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the J31 switch connector.

  2. Measure the resistance of the wire harness.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (J31-8) - Body ground
    		GR - 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 J31 switch connector.

  4. Measure the resistance and voltage at the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (J31-8) - Body ground
    		GR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    VC5 (J31-14) - AGND (J31-8)
    		R - GR
    		Power supply
    		Key is not in cabin
    		Below 1 V
    VC5 (J31-14) - AGND (J31-8)
    		R - GR
    		Power supply
    		Press engine switch
    		4.6 to 5.4 V
    CODE (J31-10) - AGND (J31-8)
    		SB - GR
    		Demodulated signal of key code data
    		Key is not in cabin
    		Below 1 V
    CODE (J31-10) - AGND (J31-8)
    		SB - GR
    		Demodulated signal of key code data
    		Press engine switch and hold key close to engine switch*
    		Pulse generation
    (see waveform 1)
    TXCT (J31-9) - AGND (J31-8)
    		L - GR
    		Key code output signal
    		Key is not in cabin
    		Below 1 V
    TXCT (J31-9) - AGND (J31-8)
    		L - GR
    		Key code output signal
    		Press engine switch and hold key close to engine switch*
    		Pulse generation
    (see waveform 2)
    HINT:
    *: Remove the key battery before performing this inspection.
    1. If the result is not as specified, the switch may have a malfunction.


  5. Inspect using an oscilloscope.



      Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    1. Waveform 1 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		CODE (J31-10) - AGND (J31-8)
      Tool Setting
      		2 V/DIV., 20 msec./DIV.
      Condition
      		Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key battery before performing this inspection.


      2. Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    2. Waveform 2 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		TXCT (J31-9) - AGND (J31-8)
      Tool Setting
      		2 V/DIV., 20 msec./DIV.
      Condition
      		Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key battery before performing this inspection.

CHECK CERTIFICATION ECU

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the P33 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E (P33-17) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    +B1 (P33-1) - E (P33-17)
    		L - W-B
    		+B power supply
    		Always
    		10 to 14 V
    IG (P33-18) - E (P33-17)
    		B - W-B
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the P33 ECU connector.

  4. Measure the resistance and voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    AGND (P33-40) - Body ground
    		LG - Body ground
    		Engine switch ground
    		Always
    		Below 1 Ω
    VC5 (P33-30) - AGND (P33-40)
    		L - LG
    		Engine switch power supply
    		Key is not in cabin
    		Below 1 V
    VC5 (P33-30) - AGND (P33-40)
    		L - LG
    		Engine switch power supply
    		Press engine switch
    		4.6 to 5.4 V
    CODE (P33-9) - AGND (P33-40)
    		GR - LG
    		Engine switch CODE input
    		Key is not in cabin
    		Below 1 V
    CODE (P33-9) - AGND (P33-40)
    		GR - LG
    		Engine switch CODE input
    		Press engine switch and hold key close to engine switch*
    		Pulse generation
    (see waveform 1)
    TXCT (P33-8) - AGND (P33-40)
    		G - LG
    		Engine switch TX output
    		Key is not in cabin
    		Below 1 V
    TXCT (P33-8) - AGND (P33-40)
    		G - LG
    		Engine switch TX output
    		Press engine switch and hold key close to engine switch*
    		Pulse generation
    (see waveform 2)
    HINT:
    *: Remove the key battery before performing this inspection.
    1. If the result is not as specified, the ECU may have a malfunction.


  5. Inspect using an oscilloscope.



      Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    1. Waveform 1 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		CODE (P33-9) - AGND (P33-40)
      Tool Setting
      		2 V/DIV., 20 msec./DIV.
      Condition
      		Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key battery before performing this inspection.


      2. Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    2. Waveform 2 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		TXCT (P33-8) - AGND (P33-40)
      Tool Setting
      		2 V/DIV., 20 msec./DIV.
      Condition
      		Press engine switch and hold key close to engine switch*
      HINT:
      *: Remove the key battery before performing this inspection.

CHECK ID CODE BOX

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the J69 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND (J69-8) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    +B (J69-1) - GND (J69-8)
    		G - W-B
    		+B power supply
    		Always
    		10 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the J69 ECU connector.

  4. Measure the voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    EFII (J69-5) - GND (J69-8)
    		W - W-B
    		ECM input signal
    		Engine switch off
    		Below 1 V
    EFII (J69-5) - GND (J69-8)
    		W - W-B
    		ECM input signal
    		Engine switch on (IG)
    		Pulse generation (see waveform 1)
    EFIO (J69-6) - GND (J69-8)
    		P - W-B
    		ECM output signal
    		Engine switch off
    		Below 1 V
    EFIO (J69-6) - GND (J69-8)
    		P - W-B
    		ECM output signal
    		Engine switch on (IG)
    		Pulse generation (see waveform 2)
    1. If the result is not as specified, the ECU may have a malfunction.


  5. Inspect using an oscilloscope.



      Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    1. Waveform 1 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		EFII (J69-5) - GND (J69-8)
      Tool Setting
      		10 V/DIV., 100 msec./DIV.
      Condition
      		Engine switch on (IG)


      2. Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    2. Waveform 2 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		EFIO (J69-6) - GND (J69-8)
      Tool Setting
      		10 V/DIV., 100 msec./DIV.
      Condition
      		Engine switch on (IG)

CHECK POWER SOURCE CONTROL ECU

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the J55 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND2 (J55-6) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    AM2 (J55-12) - Body ground
    		O - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    AM1 (J55-33) - Body ground
    		O - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

CHECK STEERING CONTROL ECU

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the J29 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    SGND (J29-2) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    GND (J29-1) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    B (J29-7) - Body ground
    		O - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    IG2 (J29-6) - Body ground
    		LG - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    IG2 (J29-6) - Body ground
    		LG - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		10 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

CHECK ECM

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Measure the resistance and voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    E1 (A49-109) - Body ground
    		BR - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E01 (E59-45) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E02 (E59-44) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    E05 (E59-46) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    EOM (A49-37) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    BATT (A49-2) - E1 (E59-109)
    		L - BR
    		Battery (for measuring battery voltage and for ECM memory)
    		Always
    		10 to 14 V
    +B (49-1) - E1 (E49-109)
    		B-R - BR
    		Power source of ECM
    		Engine switch off
    		Below 1 V
    +B (A49-1) - E1 (E49-109)
    		B-R - BR
    		Power source of ECM
    		Engine switch on (IG)
    		10 to 14 V
    IMI (A49-16) - E1 (E59-109)
    		LG - BR
    		Immobiliser code ECU input signal
    		Engine switch off
    		Below 1 V
    IMI (A49-16) - E1 (E59-109)
    		LG - BR
    		Immobiliser code ECU input signal
    		Engine switch on (IG)
    		Pulse generation (see waveform 1)
    IMO (A49-15) - E1 (E59-109)
    		W-R - BR
    		Immobiliser code ECU output signal
    		Engine switch off
    		Below 1 V
    IMO (A49-15) - E1 (E59-109)
    		W-R - BR
    		Immobiliser code ECU output signal
    		Engine switch on (IG)
    		Pulse generation (see waveform 2)
    1. If the result is not as specified, the ECM may have a malfunction.


  2. Inspect using an oscilloscope.



      Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    1. Waveform 1 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		IMI (A49-16) - E1 (E59-109)
      Tool Setting
      		10 V/DIV., 100 msec./DIV.
      Condition
      		Engine switch on (IG)


      2. Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

    2. Waveform 2 (Reference)

      Item
      		Content
      Symbols (Terminal No.)
      		IMO (A49-15) - E1 (E59-109)
      Tool Setting
      		10 V/DIV., 100 msec./DIV.
      Condition
      		Engine switch on (IG)

CHECK MAIN BODY ECU RH (COWL SIDE J/B RH)

Lexus Is250, Is220D. Gse20 Ale20.Engine Immobiliser.Engine Immobiliser System (For 2Ad-Fhv).Engine Immobiliser System (For 2Ad-Fhv) Terminals Of Ecu

  1. Disconnect the RD and RM junction block connectors.

  2. Measure the resistance and voltage at the wire harness side connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    GND2 (RD-7) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    IG (RM-1) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    IG (RM-1) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		10 to 14 V
    1. If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the RD and RM junction block connectors.

  4. Measure the voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    IND (J74-24) - Body ground
    		LG - Body ground
    		Indicator light signal
    		Key is not in cabin (immobiliser system is not set)
    		Alternating between 10 to 14 V (0.2 seconds) and below 1 V
    1. If the result is not as specified, the main body ECU RH (cowl side J/B RH) may have a malfunction.