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.
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HOMESERVICE MANUALSMITSUBISHI2009LANCER L4-2.4L (4B12)REPAIR AND DIAGNOSISACCESSORIES AND OPTIONAL EQUIPMENTANTITHEFT AND ALARM SYSTEMSKEYLESS ENTRYKEYLESS ENTRY TRANSMITTERSERVICE AND REPAIR
2009 Mitsubishi Lancer L4-2.4L (4B12)
Keyless Entry Transmitter: Service and Repair
2009 Mitsubishi Lancer L4-2.4L (4B12)SECTION Service and Repair
KEYLESS OPERATION KEY
DISASSEMBLY AND ASSEMBLY
WARNING: Coin-type lithium battery may contain perchlorate materials. Special handling may apply. For additional information, see www.dtsc.ca.gov/hazardouswaste/perchlorate.
DISASSEMBLY SERVICE POINTS
[A] EMERGENCY KEY REMOVAL
With the lever being pressed in the arrow direction of the illustration, pull out the emergency key from the keyless operation key and remove it.
[B] UPPER COVER/TRANSMITTER ASSEMBLY/BATTERY/LOWER COVER REMOVAL
CAUTION: Do not allow water or dust to enter the inside of the transmitter assembly when it is open. Also, do not touch the precision electronic device.
Place a flat-tipped screwdriver wrapped with protective tape as shown in the figure, and lever the keyless operation key to remove.
ASSEMBLY SERVICE POINT
[A] BATTERY INSTALLATION
CAUTION: Do not allow water or dust to enter the inside of the transmitter assembly when it is open. Also, do not touch the precision electronic device.
Install a new battery with the positive side facing toward the lower cover.
Replacement battery: Coin-type lithium battery CR2032
DISASSEMBLY AND ASSEMBLY
WARNING: Coin-type lithium battery may contain perchlorate materials. Special handling may apply. For additional information, see www.dtsc.ca.gov/hazardouswaste/perchlorate.
Post-installation Operation:
Disassembly Steps 1-5:
DISASSEMBLY SERVICE POINTS
[A] EMERGENCY KEY REMOVAL
With the lever being pressed in the arrow direction of the illustration, pull out the emergency key from the keyless operation key and remove it.
[B] UPPER COVER/TRANSMITTER ASSEMBLY/BATTERY/LOWER COVER REMOVAL
CAUTION: Do not allow water or dust to enter the inside of the transmitter assembly when it is open. Also, do not touch the precision electronic device.
Place a flat-tipped screwdriver wrapped with protective tape as shown in the figure, and lever the keyless operation key to remove.
ASSEMBLY SERVICE POINT
[A] BATTERY INSTALLATION
CAUTION: Do not allow water or dust to enter the inside of the transmitter assembly when it is open. Also, do not touch the precision electronic device.
Install a new battery with the positive side facing toward the lower cover.
Replacement battery: Coin-type lithium battery CR2032
RENDER: 1.0x
NO RELATED
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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.