Wireless Control Module (WCM)

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 operation of warning function that warns a person who intends to damage the vehicle *), can be performed by operating the lock/unlock button, 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 the system error 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





NOTE:

- *: Illuminates for tire pressure warning.
- *: Flashes for about 1 minute and then continuously illuminated for TPMS malfunction warning.

System configuration





NOTE:
In case of replacement of WCM, all keyless ID, key ID and tire pressure sensor ID should be re-registered using scan tool MB991958 (M.U.T.-III sub-assembly).

KEYLESS ENTRY FUNCTION

TRANSMITTER

The transmitter button operation allows the system to operate as follows: