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Diagnosis System

  1. DESCRIPTION 

    Power shoulder belt anchorage system data can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the hand-held tester to check for malfunctions and perform repairs.

  2. CHECK DLC3 

    The vehicle's ECU uses the ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

    HINT:

    Connect the cable of the hand-held tester (with CAN VIM) to the DLC3, turn the ignition switch ON and attempt to use the hand-held tester. If the screen displays UNABLE TO CONNECT TO VEHICLE, a problem exists in the vehicle side or the tester side.

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

    If the communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.

    Fig 1: Checking DLC3
    G03002598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DLC3 REFERENCE TABLE

    Symbols (Terminals 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
  3. INSPECT BATTERY VOLTAGE 

    Standard: 11 to 14 V 

    If voltage is below 11 V, recharge the battery before proceeding.

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