2011 Lexus IS 350 Base, AWDFACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT: 

*: Use the Techstream.

  1. VEHICLE BROUGHT TO WORKSHOP 

    NEXT: Go to next step 

  2. CHECK AND CLEAR DTCS* 

    NEXT: Go to next step 

  3. PROBLEM SYMPTOM CONFIRMATION 

    → SYMPTOM DOES NOT OCCUR (Go to step 4) 

    → SYMPTOM OCCURS (Go to step 5) 

  4. SYMPTOM SIMULATION 

    NEXT: Go to next step 

  5. CHECK MULTIPLEX COMMUNICATION SYSTEM 

    HINT: 

    Check that there are no problems in the multiplex communication system before troubleshooting the steering lock system.

    NEXT: Go to next step 

  6. DTC CHECK* 

    → DTC IS NOT OUTPUT (Go to step 7) 

    → DTC IS OUTPUT (Go to step 8) 

  7. PROBLEM SYMPTOMS TABLE 

    → Go to step 9 

  8. DTC CHART 

    NEXT: Go to next step 

  9. CIRCUIT INSPECTION* 

    NEXT: Go to next step 

  10. PROBLEM IDENTIFICATION 

    NEXT: Go to next step 

  11. REPAIR OR REPLACEMENT 

    NEXT: Go to next step 

  12. CONFIRMATION TEST* 

    NEXT → END 

Factory Service Tools

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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.