POWER TILT AND POWER TELESCOPIC STEERING COLUMN SYSTEM DIAGNOSIS SYSTEM


  1. DESCRIPTION


    1. When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's multiplex tilt and telescopic ECU.

      The multiplex tilt and telescopic ECU records DTCs when the ECU detects a malfunction in the computer itself or in its circuits.

      To check the DTCs, connect the intelligent tester to the DLC3 on the vehicle. The intelligent tester enables you to clear the DTCs, activate several actuators, and check the freeze frame data and various forms of steering data.

  2. DLC3 CHECK


    1. A015ZDXE16

      The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with ISO 15031-3 and matches the ISO 15765-4 format.


      1. Symbol (Terminal No.) Terminal Description Condition Specified Condition
        SIL (7) - SG (5) Bus "+" line During communication 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 Engine switch off* 54 to 67 Ω
        CANH (6) - CG (4) HIGH-level CAN bus line Engine switch off* 200 Ω or higher
        CANL (14) - CG (4) LOW-level CAN bus line Engine switch off* 200 Ω or higher
        CANH (6) - BAT (16) HIGH-level CAN bus line Engine switch off* 6 kΩ or higher
        CANL (14) - BAT (16) LOW-level CAN bus line Engine switch off* 6 kΩ or higher

        Note

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

        Tech Tips

        If the display shows a communication error message after connecting the intelligent tester cable to the DLC3 and turning the engine switch on (IG), there is a problem either with the vehicle or the intelligent tester.


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

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