ENGINE IMMOBILISER SYSTEM > DIAGNOSIS SYSTEM

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DESCRIPTION

  1. The hybrid vehicle control ECU controls the function of the immobiliser system on the vehicle.
    Data from the immobiliser system and the Diagnostic Trouble Code (DTC) can be read in the Data Link Connector 3 (DLC3) of the vehicle. When a malfunction occurs in the immobiliser system, even though the security indicator light does not come on, DTCs can be checked.
    Therefore, when the immobiliser system seems to be a malfunction, use the intelligent tester to check for a malfunction and repair it.


CHECK DLC3


    B050154E01

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

    Tester Connection
    		Condition
    		Specified Condition
    7 (Bus+line) - 5 (Signal ground)
    		During communication
    		Pulse generation
    4 (Chassis ground) - Body ground
    		Always
    		Below 1 Ω
    5 (Signal ground) - Body ground
    		Always
    		Below 1 Ω
    16 (B+) - Body ground
    		Always
    		9 to 14 V

    HINT:
    If the screen displays a communication error message after you have connected the cable of the intelligent tester to the DLC3, turned the ignition switch ON and used the intelligent tester, the problem may be on the vehicle side or the tester side.
    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 impossible when the tester is connected to another vehicle, the problem may be in the tester itself, so consult the Service Department listed in the tester's is instruction manual.