2007 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Basic Inspection

When the malfunction is not confirmed page IN-3 by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.

  1. CHECK BATTERY VOLTAGE 
    NOTE: Perform this check with the engine stopped and the ignition switch OFF.
    RESULT CHART

    Result Proceed to
    11 V or more OK
    Below 11 V NG

    NG: CHARGE OR REPLACE BATTERY 

    OK: Go to next step 

  2. CHECK WHETHER ENGINE WILL CRANK 

    NG: PROCEED TO PROBLEM SYMPTOMS TABLE 

    OK: Go to next step 

  3. CHECK WHETHER ENGINE STARTS 

    NG: GO TO STEP  6

    OK: Go to next step 

  4. CHECK AIR FILTER 
    1. Visually check that the air filter is not excessively contaminated with dirt or oil.

    NG: REPLACE AIR FILTER 

    OK: Go to next step 

  5. CHECK IDLING SPEED 

    NG: PROCEED TO PROBLEM SYMPTOMS TABLE 

    OK: Go to next step 

  6. CHECK FUEL PRESSURE 

    NG: PROCEED TO TROUBLESHOOTING 

    OK: Go to next step 

  7. CHECK FOR SPARK 

    NG: PROCEED TO TROUBLESHOOTING 

    OK: PROCEED TO PROBLEM SYMPTOMS TABLE 

Factory Service Tools

Use the Manual With the Right Hardware

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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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