Lexus IS250 · Service Manual BRAKE

HOW TO PROCEED WITH TROUBLESHOOTING

Troubleshooting

HINT:
  1. The vehicle stability control system troubleshooting procedures are based on the premise that the multiplex communication system is operating normally. Check the multiplex communication system first before troubleshooting the vehicle stability control system.
  2. The intelligent tester can be used at steps 3, 7, and 10.


1.VEHICLE BROUGHT TO WORKSHOP
    NEXT

    2.CUSTOMER PROBLEM ANALYSIS

    1. Interview and confirm the trouble (Click here).

    NEXT

    3.CHECK DTC AND FREEZE FRAME DATA

    1. Check and record a DTC and Freeze Frame Data.

    2. Clear the DTC and Freeze Frame Data (Click here).

    3. Reconfirm the DTC.

      1. Reconfirm the DTC based on the recorded DTC and Freeze Frame Data (Click here).

        HINT:
        If any of the DTC U0100/65, U0123/62, U0124/95, and U0126/63 is output together with a CAN communication DTC, first check the appropriate sensor for a momentary open circuit (Click here).


        Result:
        Condition
        		 Proceed to
        DTC is output
        		 A
        DTC is not output (Problem symptom does not occur)
        		 B
        DTC is not output (Problem symptom occurs)
        		 C


    		B.

    		C.
    A

    4.DIAGNOSTIC TROUBLE CODE CHART
      NEXT

      5.SYMPTOM SIMULATION
        NEXT

        6.PROBLEM SYMPTOMS TABLE
          NEXT

          7.CIRCUIT INSPECTION
            NEXT

            8.IDENTIFICATION OF PROBLEM
              NEXT

              9.REPAIR OR REPLACEMENT
                NEXT

                10.CONFIRMATION TEST
                  NEXT

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