Entry And Start System Terminals Of Ecu

Body Electrical. Lexus Is250, Is220D. Gse20 Ale20
Door Lock. Lexus Is250, Is220D. Gse20 Ale20

  1. CHECK CERTIFICATION ECU

  1. MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

Entry And Start System -- Terminals Of Ecu



CHECK CERTIFICATION ECU

Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Terminals Of Ecu

  1. Disconnect the P33 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    +B1 (P33-1) - Body ground
    		L - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    IG (P33-18) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch off
    		Below 1 V
    IG (P33-18) - Body ground
    		B - Body ground
    		Ignition power supply
    		Engine switch on (IG)
    		10 to 14 V
    E (P33-17) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    ACC (P33-19) - Body ground
    		O - Body ground
    		ACC power supply
    		Engine switch off
    		Below 1 V
    ACC (P33-19) - Body ground
    		O - Body ground
    		ACC power supply
    		Engine switch on (ACC)
    		10 to 14 V
    TSW1 (P33-3) - Body ground
    		Y - Body ground
    		Entry lock switch signal
    		Front lock switch LH not pushed
    		10 KΩ or higher
    TSW1 (P33-3) - Body ground
    		Y - Body ground
    		Entry lock switch signal
    		Front lock switch LH pushed
    		Below 1 Ω
    TSW2 (P33-4) - Body ground
    		BR - Body ground
    		Entry lock switch signal
    		Front lock switch RH not pushed
    		10 KΩ or higher
    TSW2 (P33-4) - Body ground
    		BR - Body ground
    		Entry lock switch signal
    		Front lock switch RH pushed
    		Below 1 Ω
    LIN (P33-10) - Body ground
    		V - Body ground
    		LIN line
    		Always
    		10 kΩ or higher
    MPX1 (P33-27) - Body ground
    		GR - Body ground
    		MPX line
    		Always
    		10 kΩ or higher
    MPX2 (P33-28) - Body ground
    		GR - Body ground
    		MPX line
    		Always
    		10 kΩ or higher
    AGND (P33-40) - Body ground
    		LG - Body ground
    		Ground
    		Always
    		Below 1 Ω
    1. If the result is not as specified, the wire harness side may have a malfunction.

  3. Reconnect the P33 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    CLG1 (P33-33) - CG1B (P33-34)
    		R - BR
    		Door electrical key oscillator (front LH) sensor signal
    		All doors closed, all doors locked and engine switch off
    		Alternating between 5 V and below 1 V
    CLG1 (P33-33) - CG1B (P33-34)
    		R - BR
    		Door electrical key oscillator (front LH) sensor signal
    		Door unlocked or door open
    		Below 1 V
    SEN1 (P33-22) - E (P33-17)
    		W (*1) - W-B
    G (*2) - W-B
    		Touch sensor detection signal
    		Outside door handle touched
    		Below 1 V
    SEN1 (P33-22) - E (P33-17)
    		W (*1) - W-B
    G (*2) - W-B
    		Touch sensor detection signal
    		Outside door handle not touched
    		10 to 14 V
    SEL1 (P33-5) - E (P33-17)
    		W (*1) - W-B
    B (*2) - W-B
    		Touch sensor activation control signal
    		Move the key more than 5 m (16.4 ft) away from the front door LH
    		10 to 14 V
    SEL1 (P33-5) - E (P33-17)
    		W (*1) - W-B
    B (*2) - W-B
    		Touch sensor activation control signal
    		Bring it to the outside handle
    		Below 1 V
    CLG2 (P33-35) - CG2B (P33-36)
    		G - BR
    		Door electrical key oscillator (front RH) sensor signal
    		All doors closed, all doors locked and engine switch off
    		Alternating between 5 V and below 1 V
    CLG2 (P33-35) - CG2B (P33-36)
    		G - BR
    		Door electrical key oscillator (front RH) sensor signal
    		Door unlocked or door open
    		Below 1 V
    SEN2 (P33-23) - E (P33-17)
    		W (*1) - W-B
    G (*2) - W-B
    		Touch sensor detection signal
    		Outside door handle touched
    		Below 1 V
    SEN2 (P33-23) - E (P33-17)
    		W (*1) - W-B
    G (*2) - W-B
    		Touch sensor detection signal
    		Outside door handle not touched
    		10 to 14 V
    SEL2 (P33-6) - E (P33-17)
    		W (*1) - W-B
    B (*2) - W-B
    		Touch sensor activation control signal
    		Move the key more than 5 m (16.4 ft) away from the front door RH
    		10 to 14 V
    SEL2 (P33-6) - E (P33-17)
    		W (*1) - W-B
    B (*2) - W-B
    		Touch sensor activation control signal
    		Bring it to the outside handle
    		Below 1 V
    CLG5 (P33-11) - CG5B (P33-12)
    		Y - V
    		Indoor electrical key oscillator (front) sensor signal
    		30 seconds after driver side door opened and closed, engine switch off
    		Alternating between 5 V and below 1 V
    CLG5 (P33-11) - CG5B (P33-12)
    		Y - V
    		Indoor electrical key oscillator (front) sensor signal
    		Within 30 seconds driver side door opened and closed, engine switch off
    		Below 1 V
    CLG6 (P33-13) - CG6B (P33-14)
    		LG - O
    		Indoor electrical key oscillator (rear) sensor signal
    		30 seconds after driver side door opened and closed, engine switch off
    		Alternating between 5 V and below 1 V
    CLG6 (P33-13) - CG6B (P33-14)
    		LG - O
    		Indoor electrical key oscillator (rear) sensor signal
    		Within 30 seconds driver side door opened and closed, engine switch off
    		Below 1 V
    CLG7 (P33-15) - CG7B (P33-16)
    		SB - P
    		Luggage electrical key oscillator (inner) sensor signal
    		Luggage compartment door opening switch OFF
    		Alternating between 5 V and below 1 V
    CLG7 (P33-15) - CG7B (P33-16)
    		SB - P
    		Luggage electrical key oscillator (inner) sensor signal
    		Luggage compartment door opening switch ON
    		Below 1 V
    CLG8 (P33-31) - CG8B (P33-32)
    		B - W
    		Luggage electrical key oscillator (outer) sensor signal
    		Luggage compartment door opening switch OFF
    		Alternating between 5 V and below 1 V
    CLG8 (P33-31) - CG8B (P33-32)
    		B - W
    		Luggage electrical key oscillator (outer) sensor signal
    		Luggage compartment door opening switch ON
    		Below 1 V
    RCO (P33-29) - E (P33-17)
    		LG - W-B
    		Entry door control receiver power source
    		Engine switch off, all doors closed and electrical key switch on.
    		4.6 to 5.4 V
    RCO (P33-29) - E (P33-17)
    		LG - W-B
    		Entry door control receiver power source
    		Engine switch off, all doors closed and electrical key switch off.
    		Below 1 V
    RSSI (P33-39) - E (P33-17)
    		Y - W-B
    		Entry door control receiver electric wave existence signal
    		Engine switch off, all doors closed, the electrical key is not in the action area.
    		10 to 14 V
    RSSI (P33-39) - E (P33-17)
    		Y - W-B
    		Entry door control receiver electric wave existence signal
    		Engine switch off, all doors closed, the electrical key is in the action area.
    		Below 1 V
    RDA (P33-38) - E (P33-17)
    		R - W-B
    		Entry door control receiver data input signal
    		Engine switch off, all doors closed and electrical key switch off.
    		10 to 14 V
    RDA (P33-38) - E (P33-17)
    		R - W-B
    		Entry door control receiver data input signal
    		Engine switch off, all doors closed and electrical key switch on.
    		Pulse generation
    RDA (P33-38) - Body ground
    		R - Body ground
    		Tuner input signal
    		Engine switch off, all doors closed, the electrical key is not in the action area.
    		10 to 14 V
    RDA (P33-38) - Body ground
    		R - Body ground
    		Tuner input signal
    		The electrical key is in the action area.
    		Pulse generation
    ASEL (P33-37) - Body ground
    		SB - Body ground
    		Tuner select signal
    		Engine switch off, luggage compartment door closed.
    		4.6 to 5.4 V
    ASEL (P33-37) - Body ground
    		SB - Body ground
    		Tuner select signal
    		Engine switch off, luggage compartment door open.
    		Below 1 V
    VC5 (P33-30) - Body ground
    		L - Body ground
    		Transponder key amplifier power supply
    		Electrical key is not in the vehicle.
    		Below 1 V
    VC5 (P33-30) - Body ground
    		L - Body ground
    		Transponder key amplifier power supply
    		Have the electrical key outside the cabin and open the driver's door.
    		4.6 to 5.4 V
    TXCT (P33-8) - Body ground
    		G - Body ground
    		Transponder key amplifier output signal
    		Electrical key is not in the cabin.
    		Below 1 V
    TXCT (P33-8) - Body ground
    		G - Body ground
    		Transponder key amplifier output signal
    		Have the electrical key outside the cabin and open the driver's door.
    		Pulse generation
    (see waveform 1)
    CODE (P33-9) - Body ground
    		GR - Body ground
    		Transponder key amplifier communication signal
    		Electrical key is not in the cabin.
    		Below 1 V
    CODE (P33-9) - Body ground
    		GR - Body ground
    		Transponder key amplifier communication signal
    		Have the electrical key outside the cabin and open the driver's door.
    		Pulse generation
    (see waveform 2)
    *1: LHD Models
    *2: RHD Models
    If the result is not as specified, the ECU may have a malfunction.


    5. Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Terminals Of Ecu

  5. Inspect using an oscilloscope.

    Waveform 1 (Reference):
    Terminal
    		TXCT - Body ground
    Tool Setting
    		2 V/DIV, 10 ms/DIV
    Condition
    		The electrical key is not in the cabin.


    6. Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Terminals Of Ecu

  6. Inspect using an oscilloscope.

    Waveform 2 (Reference):
    Terminal
    		CODE - Body ground
    Tool Setting
    		2 V/DIV, 20 ms/DIV
    Condition
    		The electrical key is not in the cabin.

MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)


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


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Terminals Of Ecu


    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    LPSW (Q3-13) - Body ground
    		BR - Body ground
    		Luggage compartment opener switch signal
    		Luggage compartment opener switch OFF
    		10 to 14 V
    LPSW (Q3-13) - Body ground
    		BR - Body ground
    		Luggage compartment opener switch signal
    		Luggage compartment opener switch ON
    		Below 1 V
    If the result is not as specified, the junction block may have a malfunction.