Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2008 Toyota Matrix Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Transmitter Battery: Replacement

REPLACE TRANSMITTER BATTERY
NOTE: Take extra care when handling these precision electronic components.
1. Using a screwdriver, pry out the transmitter case.
  NOTE: Do not forcibly pry out the case.
  
  HINT:
  
  Tape the screwdriver tip before use.
  
  Fig 1: Prying Out Transmitter Case
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the battery (lithium battery).
  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 interfere with proper operation.
    
    Fig 2: Identifying Battery (Lithium Battery)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REPLACE 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.
2. Install the case securely.

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.

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