Transmitter Battery : Replacement

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

REMOVE TRANSMITTER SUB-ASSY MODULE SET DOOR CONTROL
NOTE: Special caution should be taken for handling each component as they are precision electronic components.
REMOVE TRANSMITTER BATTERY
1. Using a coin, remove the cover.
  
  Fig 1: Removing Transmitter Battery Cover
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the transmitter battery (lithium battery).
  
  Fig 2: Removing Transmitter Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  NOTE:
  - Do not push the terminals with your finger.
  - Prying up the battery (lithium battery) to forcibly remove it will cause deformation of the terminals.
  - Do not touch the battery with wet hands. Water may cause unexpected rust.
  - Do not touch or move any components inside the transmitter as it may interfere with proper operation.
INSTALL TRANSMITTER BATTERY
1. Install a new battery (lithium battery) with the positive (+) side up, as shown in Fig 3.
  
  Fig 3: Installing Transmitter Battery
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  NOTE:
  - Be sure that the positive side and the negative side of the transmitter battery are matched-up correctly.
  - Be careful not to bend the electrode of the transmitter battery insertion.
  - Be careful that dust or oil does not adhere to the transmitter case.
2. Install the cover.
  NOTE: If the screws are loose, it may cause faulty contact between the battery (lithium battery) and the terminals.