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 DIAGNOSISBODY AND FRAMEBODY CONTROL SYSTEMSDESCRIPTION AND OPERATION
2009 Mitsubishi Lancer L4-2.4L (4B12)
Body Control Systems: Description and Operation
2009 Mitsubishi Lancer L4-2.4L (4B12)SECTION Description and Operation
GENERAL INFORMATION
The wireless control module (WCM) is a system that integrates the keyless entry function with which remote operation (opening/closing of all doors, opening of trunk lid, and warning function to warn a person who intends to damage the vehicle*) can be performed by operating the lock/unlock /trunk lid button or panic button on the ignition key (transmitter). Also, WCM incorporates the immobilizer function, which prohibits the starting of engine using an unauthorized key, and the tire pressure monitoring system (TPMS), which issues a warning to a driver by illuminating or flashing the warning light if an abnormality to the tire pressure or system is detected. WCM has the following features:
- The ignition key has an indicator light that enables the driver to check if the signal is transmitted correctly or if the battery in the key is discharged.
- Each vehicle is provided with two ignition keys, and up to eight ignition keys can be registered.
- Settings of the keyless entry function can be adjusted using a customization function.
NOTE: Horn sounds, and headlights and taillights flash.
CONSTRUCTION DIAGRAM
Main Components and Functions
System configuration
The wireless control module (WCM) is a system that integrates the keyless entry function with which remote operation (opening/closing of all doors, opening of trunk lid, and warning function to warn a person who intends to damage the vehicle*) can be performed by operating the lock/unlock /trunk lid button or panic button on the ignition key (transmitter). Also, WCM incorporates the immobilizer function, which prohibits the starting of engine using an unauthorized key, and the tire pressure monitoring system (TPMS), which issues a warning to a driver by illuminating or flashing the warning light if an abnormality to the tire pressure or system is detected. WCM has the following features:
- The ignition key has an indicator light that enables the driver to check if the signal is transmitted correctly or if the battery in the key is discharged.
- Each vehicle is provided with two ignition keys, and up to eight ignition keys can be registered.
- Settings of the keyless entry function can be adjusted using a customization function.
NOTE: Horn sounds, and headlights and taillights flash.
CONSTRUCTION DIAGRAM
Construction Diagram:
Main Components and Functions
Main Components And Functions:
System configuration
System Configuration:
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.