Wireless Door Lock Control System Terminals Of Ecu

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

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

  1. CHECK CERTIFICATION ECU ASSEMBLY

Wireless Door Lock Control System -- Terminals Of Ecu



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


  1. Disconnect the main body ECU RH (cowl side J/B RH) connectors.


    Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Wireless Door Lock Control System Terminals Of Ecu

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    PCTY (J75-23) - Body ground
    		B*1 - Body ground
    		Passenger side courtesy light switch input
    		Passenger side door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    PCTY (J75-23) - Body ground
    		V*2- Body ground
    		Passenger side courtesy light switch input
    		Passenger side door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    LGCY (J75-25) - Body ground
    		L - Body ground
    		Luggage compartment door courtesy light switch input
    		Luggage compartment door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    DCTY (P1-14) - Body ground
    		W - Body ground
    		Driver side door courtesy light switch input
    		Driver side door CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    RCTY (P1-16) - Body ground
    		O - Body ground
    		Rear courtesy light switch RH input
    		Rear door RH CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    GND2 (RA-5) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    LCTY (RA-11) - Body ground
    		BR - Body ground
    		Rear courtesy light switch LH input
    		Rear door LH CLOSED (OFF) → OPEN (ON)
    		10 kΩ or higher → Below 1 Ω
    GND2 (RD-7) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    BECU (RK-5) - Body ground
    		G-R - Body ground
    		+B power supply
    		Always
    		10 to 14 V
    IG (RM-1) - Body ground
    		B - Body ground
    		Ignition power supply (IG signal)
    		Engine switch on (IG) → off
    		10 to 14 V → Below 1 V
    HINT:
    *1: LHD
    *2: RHD
    If the result is not as specified, there may be a malfunction on the wire harness side.

  3. Reconnect the main body ECU RH (cowl side J/B RH) connectors.

  4. Measure the resistance and voltage of the wire harness side connectors.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    SH (A36-1) - Body ground
    		 W- Body ground
    		Security horn drive
    		Answer back security horn is not sounding → Sounding
    		 Below 1 V → 10 to 14 V
    BZR* (A36-2) - Body ground
    		G - Body ground
    		Wireless door lock buzzer
    		Wireless doo lock buzzer OFF → ON
    		0 V → Pulse generation
    TR+ (J74-1) - Body ground
    		P - Body ground
    		Luggage compartment door opener motor input
    		Luggage compartment door CLOSED (LOCKED) → OPEN (UNLOCKED)
    		Below 1 V → 10 to 14 V
    HAZ (J74-2) - Body ground
    		Y - Body ground
    		Turn signal flasher relay signal
    		Any transmitter switch is pressed → not pressed
    		Below 1 V → 10 to 14 V
    HINT:
    *: Australia, New Zealand

CHECK CERTIFICATION ECU ASSEMBLY

Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Wireless Door Lock Control System Terminals Of Ecu

  1. Disconnect the P33 ECU connector.

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

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    +B1 (P33-1) - E (P33-17)
    		L - W-B
    		Battery power supply
    		Always
    		10 to 14 V
    E (P33-17) - Body ground
    		W-B - Body ground
    		Ground
    		Always
    		Below 1 Ω
    IG (P33-18) - E (P33-17)
    		B - W-B
    		IG power supply
    		Engine switch on (IG)
    		10 to 14 V
    IG (P33-18) - E (P33-17)
    		B - W-B
    		IG 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 voltage of the connector.

    Symbols (Terminal No.)
    		Wiring Color
    		Terminal Description
    		Condition
    		Specified Condition
    RC0 (P33-29) - E (P33-17)
    		Y - W-B
    		Door control receiver power supply
    		Engine switch off, all doors closed and transmitter switch not pressed
    		Below 1 V
    RC0 (P33-29) - E (P33-17)
    		Y - W-B
    		Door control receiver power supply
    		Engine switch off, all doors closed and transmitter switch pressed
    		4.6 to 5.4 V
    RDA (P33-38) - E (P33-17)
    		R - W-B
    		Door control receiver output signal
    		Engine switch off, all doors closed and transmitter switch not pressed
    		10 to 14 V
    RDA (P33-38) - E (P33-17)
    		R - W-B
    		Door control receiver output signal
    		Engine switch off, all doors closed and transmitter switch pressed
    		Pulse generation
    1. If the result is not as specified, the ECU may have a malfunction.