Entry And Start System Diagnosis System

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

  1. DESCRIPTION

  1. CHECK DLC3

Entry And Start System -- Diagnosis System



DESCRIPTION

  1. Smart access system with push-button start data and the Diagnostic Trouble Codes (DTCs) can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.


CHECK DLC3
Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Diagnosis System

  1. The vehicle uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 format.

    Symbols (Terminal No.)
    		Terminal Description
    		Condition
    		Specified Condition
    SIL (7) - SG (5)
    		Bus "+" line
    		During transmission
    		Pulse generation
    CG (4) - Body ground
    		Chassis ground
    		Always
    		Below 1 Ω
    SG (5) - Body ground
    		Signal ground
    		Always
    		Below 1 Ω
    BAT (16) - Body ground
    		Battery positive
    		Always
    		11 to 14 V
    CANH (6) - CANL (14)
    		HIGH-level CAN bus line
    		Engine switch OFF
    		54 to 69 Ω
    CANH (6) - Battery positive (+)
    		HIGH-level CAN bus line
    		Engine switch OFF
    		1 MΩ or higher
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Engine switch OFF
    		1 kΩ or higher
    CANL (14) - Battery positive (+)
    		LOW-level CAN bus line
    		Engine switch OFF
    		1 MΩ or higher
    CANL (14) - CG (4)
    		LOW-level CAN bus line
    		Engine switch OFF
    		1 kΩ or higher
    1. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.


    2. Lexus Is250, Is220D. Gse20 Ale20.Door Lock.Power Door Lock Control System.Entry And Start System Diagnosis System

  2. Intelligent Tester

    HINT:
    Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
    1. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
    2. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.