Wireless Door Lock Control System (W/Smart Entry System) - Diagnostics: Replacement

REPLACE TRANSMITTER BATTERY
NOTE: Take extra care when handling these precision electronic components.
1. Push and hold the release knob in the direction indicated by the arrow in the illustration. Take the emergency key out of the key.
  
  Fig 1: Pushing And Hold Release Knob
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Push and hold the release knob in the direction indicated by the arrow labeled A. Push out the slide cover in the direction indicated by the arrow labeled B and remove the slide cover.
  
  Fig 2: Pushing Out Slide Cover
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Remove the 4 screws and cover, as shown in the illustration.
  
  Fig 3: Removing Screws And Cover
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Remove the transmitter's battery from the key, as shown in the illustration.
NOTE:
- Do not push the terminals with your finger.
- Do not forcibly pry up the battery (lithium battery). The terminals may become damaged.
- Do not touch the battery with wet hands. Water may cause rust.
- Do not touch or move any components inside the transmitter, as it may cease to work.
  
  Fig 4: Removing Transmitter's Battery From Key
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL TRANSMITTER BATTERY
1. Install a new battery (lithium battery) with the positive (+) side up, as shown in the illustration.
  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 transmitter battery electrode during insertion.
  - Keep the transmitter case interior free of dust and oil.
    
    Fig 5: Installing Battery (Lithium Battery) With Positive Side Up
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the O-ring is not distorted or slipped off, and install the cover.
3. Tighten the 4 screws.
  NOTE: Incomplete installation of the cover will cause defective contact between the battery (lithium battery) and terminal.
4. Push and hold the release knob in the direction indicated by the arrow labeled A. Push in the slide cover in the direction indicated by the arrow labeled B and install the slide cover.
  
  Fig 6: Pushing In Slide Cover
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Push and hold the release knob in the direction indicated by the arrow. Insert the emergency key into the key.
  HINT:
  
  After installation, press any of the transmitter's switches. Check that the LED illuminates.
  
  Fig 7: Pushing And Hold Release Knob
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002