Air Conditioning System Diagnosis System

Heater & Air Conditioning System. Lexus Is250, Is220D. Gse20 Ale20
Air Conditioning. Lexus Is250, Is220D. Gse20 Ale20

  1. CHECK DLC3

Air Conditioning System -- Diagnosis System



CHECK DLC3


    Lexus Is250, Is220D. Gse20 Ale20.Air Conditioning.Air Conditioning System.Air Conditioning System Diagnosis System

  1. Check the DLC3.
    The vehicle's ECM uses the ISO 9141-2 (Euro-OBD) / ISO 14230 (M-OBD) communication protocol. The terminal arrangement of DLC3 complies with ISO 15031-3 and matches the ISO 9141-2 / ISO 14230 format.

    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.
    If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
    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.

    Symbol (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
    		3 MΩ 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
    		3 MΩ or higher