2011 Lexus GS 450hFACTORY OEM SERVICE PROCEDURE

Smart Access System With Push-Button Start: Precaution: Precaution

NOTE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.
System Name See procedure
Intuitive Parking Assist System Refer to INITIALIZATION
Theft Deterrent System
Variable Gear Ratio Steering System
  1. PRECAUTIONS WHEN USING TECHSTREAM 
    1. When using Techstream to troubleshoot the LIN communication line: Connect Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.
    2. After all DTCs are cleared, check if the trouble occurs again 6 seconds after the power switch is turned ON (IG).
  2. PRECAUTIONS FOR PUSH-BUTTON START FUNCTION: 
    1. Before starting the engine (hybrid), firmly depress the brake pedal until the indicator of the power switch lights up in green.
    2. The power source mode (OFF, ON (ACC), ON (IG)) is always stored in the vehicle. After the battery is disconnected and reconnected, the power source condition before battery disconnection will be restored. Be sure to turn the power switch OFF before disconnecting the cable from the battery terminal. Be careful if the power source condition before the battery became depleted is not known.
    3. After the battery is disconnected and reconnected, be sure to wait 10 seconds or more before engine (hybrid) start. The engine (hybrid) may not start immediately after battery is reconnected.
    4. If the key is held over the power switch to start the engine (hybrid) because the key battery is depleted, the following warnings will sound.

      HINT: 

      These warnings will sound because whether the key is in the cabin or not cannot be determined. They do not indicate system malfunctions.

      1. Driver's door open → closed
        • An exit warning if the shift lever is in a position other than P and the power source is a mode other than OFF.
        • An exit warning if the shift lever is in P and the power source is a mode other than OFF.
      2. Doors other than the driver door open → closed
        • Warning to inform that the key has been taken out of the vehicle.
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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.