ELECTRONIC POWER STEERING SYSTEM DIAGNOSIS SYSTEM


  1. CHECK DLC3


    1. A0136XB

      Check the DLC3:

      The power steering ECU assembly complies with ISO 9142-2 (Euro-OBD)/ISO for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 9141-2 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

      Tech Tips

      If the display shows UNABLE TO CONNECT TO VEHICLE after connecting the intelligent tester cable to the DLC3 and turning the ignition switch ON, there is a problem with either the vehicle or the tester.


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

      • If communication is still not possible 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 operator's manual.

  2. WARNING LIGHT

    A0136HPE01

    1. When a problem occurs in the electric power steering system, the P/S warning light on the combination meter comes on to inform the driver of the problem.