2003 Lexus ES 300FACTORY OEM SERVICE PROCEDURE

Transmitter Sub-ASSY Module Set Door Control: Replacement

HINT:

Installation is in the reverse order of the removal. But the installation is indicated only when it has a point.

  1. REMOVE TRANSMITTER SUB-ASSY MODULE SET DOOR CONTROLΒ 
    CAUTION: Special caution should be taken for handling each component as they are precise electronic components.
    1. Using a screwdriver, remove the screw and cover.
      CAUTION: Do not pry out the cover forcibly.

      HINT:

      Push the cover with a finger as shown in the illustration, so that there becomes clearance, then pry out the cover from that clearance.

    Fig 1: Pushing Cover With Finger
    G01328679Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  2. REGISTRATION OF RECOGNITION CODEΒ 

    HINT:

    • The add mode is used to retain already registered codes while registering new recognition codes. This mode is used when adding a transmitter. If the number of registered codes exceeds 4, previously registered codes will be correspondingly erased in order, starting from the first registered code.
    • The rewrite mode is used to erase all the previously registered codes and register only new recognition codes. This mode is used when exchanging the transmitter or the door control receiver for new one.
    • The prohibition mode is used to erase all the registered codes and cancel the wireless door lock function. Use this mode when the transmitter is lost.
    • The confirmation mode is used to confirm how many recognition codes have already been registered before an additional registration of a recognition code.
    1. The vehicle should be in the following conditions.
      1. The key is not inserted in the ignition key cylinder.
      2. The driver's door is opened (The other doors are closed).
      3. The driver's door is unlocked.
    2. Perform the followings in order.
      1. Insert and remove the key from the ignition key cylinder twice within 5 seconds.
      2. Close and open the driver's door twice within 40 seconds. Then insert the key into the ignition key cylinder and remove it.
      3. Close and open the driver's door twice within 40 seconds. Then insert the key into the ignition key cylinder and close the door.
      4. Turn the ignition switch from LOCK to ON and back to LOCK at approximately 1 second interval 1 to 5 times to select the mode. Then remove the key from the ignition key cylinder.
        Fig 2: Identifying On-Lock Operation Blink
        G01328680Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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