MULTIPLEX COMMUNICATION SYSTEM > DIAGNOSIS SYSTEM

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DESCRIPTION

  1. The network gateway ECU controls the functions of the multiplex communication system on the vehicle. Data of the multiplex communication system and the Diagnostic Trouble Codes (DTC) can be read through the Data Link Connector 3 (DLC3) of the vehicle.


CHECK DLC3


    E106867E03

  1. The absorber control ECU uses CAN and ISO 9141-2 (Euro-OBD) as its communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 9141-2 format.
    Verify the conditions listed in the table below:

    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

    1. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.



    2. E109221E02

  2. Connect the cable of the intelligent tester to the DLC3.

  3. Turn the ignition switch on and attempt to use the tester.

  4. There is a problem either with the vehicle or with the tester.

    1. If the display indicates that a communication error has occurred.

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

    3. If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself.

    4. Consult the Service Department listed in the tester's instruction manual.


INSPECT BATTERY VOLTAGE
If the voltage is below 11 V, recharge or replace the battery before proceeding.

Standard:
11 to 14 V