2006 Lexus RX 330 AWDFACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT:

The intelligent tester should be used in steps  3,  4,  5,  7 and  10.

  1. VEHICLE BROUGHT TO WORKSHOP 

    NEXT 

  2. CUSTOMER PROBLEM ANALYSIS 

    NEXT 

  3. CONNECT INTELLIGENT TESTER TO THE DLC3 

    HINT:

    If the display indicates a communication fault in the tester, inspect the DLC3.

    NEXT 

  4. CHECK DTC AND FREEZE FRAME DATA 

    HINT:

    Record or print DTCs and freeze frame data, if necessary (See DTC CHECK / CLEAR  ).

    NEXT 

  5. CLEAR DTC AND FREEZE FRAME DATA 

    NEXT 

  6. CONDUCT VISUAL INSPECTION 

    NEXT 

  7. SET CHECK MODE DIAGNOSIS 

    NEXT 

  8. CONFIRM PROBLEM SYMPTOMS 

    HINT:

    If the engine does not start, perform steps 10 and 12 first.

    Result 

    RESULT REFERENCE

    Result Proceed to
    Malfunction does not occur A
    Malfunction occur B

    B : GO TO STEP 10 

    A : Go to Next Step 

  9. SIMULATE SYMPTOMS 
  10. CHECK DTC 

    HINT:

    See DTC CHECK / CLEAR  .

    Result 

    RESULT REFERENCE

    Result Proceed to
    Malfunction code A
    No code B

    B : GO TO STEP 12 

    A: Go to next step 

  11. REFER TO DTC CHART 

    HINT:

    See DIAGNOSTIC TROUBLE CODE CHART  .

    NEXT : GO TO STEP 14 

  12. CONDUCT BASIC INSPECTION 

    HINT:

    See BASIC INSPECTION  .

    Result 

    RESULT REFERENCE

    Result Proceed to
    Malfunctioning parts not confirmed A
    Malfunctioning parts confirmed B

    B : GO TO STEP 17 

    A: Go to next step 

  13. REFER TO PROBLEM SYMPTOMS TABLE 

    HINT:

    See PROBLEM SYMPTOMS TABLE  .

    Result 

    RESULT REFERENCE

    Result Proceed to
    Malfunctioning circuit confirmed A
    Malfunctioning parts confirmed B

    B : GO TO STEP 17 

    A: Go to next step 

  14. CHECK ECM POWER SOURCE CIRCUIT 

    HINT:

    See ECM POWER SOURCE CIRCUIT  .

    NEXT 

  15. CONDUCT CIRCUIT INSPECTION 

    Result 

    RESULT REFERENCE

    Result Proceed to
    Malfunction not confirmed A
    Malfunction confirmed B

    B : GO TO STEP 18 

    A : Go to next step 

  16. CHECK FOR INTERMITTENT PROBLEMS 

    HINT:

    See CHECK FOR INTERMITTENT PROBLEMS  .

    NEXT : GO TO STEP 18 

  17. CONDUCT PARTS INSPECTION 

    NEXT 

  18. IDENTIFY PROBLEM 

    NEXT 

  19. ADJUST AND/OR REPAIR 

    NEXT 

  20. CONDUCT CONFIRMATION TEST 

    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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