POWER STEERING SYSTEM DIAGNOSIS SYSTEM


  1. CHECK DLC3


    1. A003T3FE66

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

      Symbol (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 Power switch off* 54 to 69 Ω
      CANH (6) - CG (4) HIGH-level CAN bus line Power switch off* 200 Ω or higher
      CANL (14) - CG (4) LOW-level CAN bus line Power switch off* 200 Ω or higher
      CANH (6) - BAT (16) HIGH-level CAN bus line Power switch off* 6 Ω or higher
      CANL (14) - BAT (16) LOW-level CAN bus line Power switch off* 6 Ω or higher

      Note

      *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch or any other switches or the doors.

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

      Tech Tips

      Connect the intelligent tester cable to the DLC3, turn the power switch on (IG) and attempt to use the intelligent tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the intelligent tester.


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

      • If communication is still not possible when the intelligent tester is connected to another vehicle, the problem may be in the intelligent tester itself. Consult the Service Department listed in the intelligent tester operator's manual.

  2. CHECK WARNING LIGHT


    1. A003TZHE01

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