2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT

  • The vehicle stability control system troubleshooting procedure is 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 (See HOW TO PROCEED WITH TROUBLESHOOTING )
  • *. Use the Techstream.
  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS 
    1. Interview the customer and confirm the problem (See HOW TO PROCEED WITH TROUBLESHOOTING )
  3. CHECK DTC AND FREEZE FRAME DATA* 
    1. Check and record DTCs and Freeze Frame Data
    2. Clear the DTCs and Freeze Frame Data (See DTC CHECK / CLEAR  for DTC Check/Clear, and FREEZE FRAME DATA  for Freeze Frame Data).
    3. Reconfirm the DTCs
      1. Reconfirm the DTCs based on the recorded DTCs and Freeze Frame Data (See DTC CHECK / CLEAR  for DTC Check/Clear, and FREEZE FRAME DATA  for Freeze Frame Data).

        HINT:

        • When DTCs indicating CAN communication system malfunctions are output, repair the CAN communication system before repairing each corresponding sensor (See HOW TO PROCEED WITH TROUBLESHOOTING ).
        • If any of DTCs 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 (See CHECK FOR INTERMITTENT PROBLEMS  )

          Result 

          RESULT REFERENCE

          Result 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: Go to step  5

    C: Go to step  6

    A: Go to next step 

  4. DIAGNOSTIC TROUBLE CODE CHART 
    1. Proceed to DIAGNOSTIC TROUBLE CODE CHART  .

    NEXT: Go to step  7

  5. SYMPTOM SIMULATION 
    1. Proceed to DIAGNOSIS SYSTEM 
  6. PROBLEM SYMPTOMS TABLE 
    1. Proceed to PROBLEM SYMPTOMS TABLE  .
  7. CIRCUIT INSPECTION* 
  8. IDENTIFICATION OF PROBLEM 
  9. REPAIR OR REPLACEMENT 
  10. CONFIRMATION TEST* 

    NEXT: END 

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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