2007 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. CHECK POWER SOURCE MODE CHANGE FUNCTION 
    1. Check the function of the engine switch.
      1. Check that power source mode changes in accordance with the conditions of the shift position and brake pedal.
      POWER SOURCE MODE PATTERN AND BRAKE PEDAL CONDITION REFERENCE

      Brake Pedal Shift Lever Power Source Mode Pattern
      Depressed P or N Position When the engine switch is pushed once.
      • off → engine start
      • on (ACC) → engine start
      • on (IG) → engine start
      Not depressed P position Each time the engine switch is pushed.
      • off → on (ACC) → on (IG) → off
      Except P Position Each time the engine switch is pushed.
      • off → on (ACC) → on (IG) → on (ACC)
      - P Position When the engine switch is pushed with power source mode on (IG) (engine running).
      • on (IG) → off
      - Except P Position When the engine switch is pushed with power source mode on (IG) (engine running).
      • on (IG) → on (ACC)
    2. Check if power source mode changes without pressing the engine switch.
      1. With power source mode on (ACC) and the shift position in P, wait for at least 1 hour. Check that power source mode changes from on (ACC) to off automatically.
  2. CHECK INDICATOR CONDITION 
    1. Check the indicator on the engine switch.
      1. Check that the engine switch indicator turns on and changes color according to the table below.
        Fig 1: Identifying Indicator Light
        G04975558Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        POWER SOURCE MODE/CONDITION AND INDICATOR LIGHT CONDITION

        Power Source Mode/Condition Indicator Light Condition
        Brake pedal released Brake pedal depressed, shift lever in P or N
        off OFF ON (Green) (When key and vehicle IDs match)
        on (ACC, IG) ON (Amber) ON (Green)
        Engine running OFF OFF
        Steering lock not unlocked Flashes (Green) for 15 sec. Flashes (Green) for 15 sec.
        System malfunction Flashes (Amber) for 15 sec. Flashes (Amber) for 15 sec.
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.