2009 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE

Electric Power Control System: Precaution

  1. NOTICE FOR DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL 
    NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
  2. NOTICE FOR INITIALIZATION 
    NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.
    SYSTEM REFERENCE CHART

    System See procedure
    Navigation System (for DVD) INITIALIZATION
    Advanced Parking Guidance System
    Rear Door Sunshade System
    Power Trunk Lid System
  3. PRECAUTION FOR ELECTRIC POWER CONTROL SYSTEM 
    1. If a load control linked system does not operate due to a problem in the electric power control system, use the Techstream to check for electric power control system DTCs, and write them down. Or, check the Data List's load control history and write down the information.
  4. PRECAUTIONS WHEN USING TECHSTREAM 
    1. When using the Techstream with the engine switch on (IG):

      After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).

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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.