How To Proceed With Troubleshooting

2007 Lexus ES 350SECTION How To Proceed With Troubleshooting

HINT:

*: Use the intelligent tester.

  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS 
    1. Interview the customer and confirm the trouble (See HOW TO PROCEED WITH TROUBLESHOOTING ).
  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 (See DTC CHECK / CLEAR , or FREEZE FRAME DATA ).
    3. Reconfirm the DTC.
      1. Reconfirm the DTC based on the recorded DTC and Freeze Frame Data (See DTC CHECK/CLEAR , or FREEZE FRAME DATA ).

        HINT:

        If any of the 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 CHART

        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: 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 

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.