Lin Communication System Diagnosis System

Communication System. Camry. Acv40 Gsv40
Multiplex Communication. Camry. Acv40 Gsv40

  1. DESCRIPTION

  1. CHECK DLC3

Lin Communication System -- Diagnosis System



DESCRIPTION
The main body ECU stores trouble codes when trouble occurs on the vehicle.
The diagnostic system allows for reading of the trouble codes from the DLC3.
Use the intelligent tester to check and solve the problem.

CHECK DLC3


    Camry. Acv40 Gsv40.Multiplex Communication.Lin Communication System.Lin Communication System Diagnosis System

  1. The main body ECU uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15765-3 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)
    		CAN bus line
    		Ignition switch OFF*
    		54 to 69 Ω
    CANH (6) - CG (4)
    		HIGH-level CAN bus line
    		Ignition switch OFF*
    		200 Ω or higher
    CANL (14) - CG (4)
    		LOW-level CAN bus line
    		Ignition switch OFF*
    		200 Ω or higher
    CANH (6) - BAT (16)
    		HIGH-level CAN bus line
    		Ignition switch OFF*
    		6 kΩ or higher
    CANL (14) - BAT (16)
    		LOW-level CAN bus line
    		Ignition switch OFF*
    		6 kΩ or higher
    NOTICE:
    *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors.
    If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.


    2. Camry. Acv40 Gsv40.Multiplex Communication.Lin Communication System.Lin Communication System Diagnosis System

  2. Connect the cable of the intelligent tester to the DLC3, turn the ignition switch to ON and attempt to use the intelligent tester. If the screen displays a communication error message, a problem exists in the vehicle or in the tester.

    1. If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
    2. If communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult the Service Department listed in the tool's instruction manual.