Description & Operation: System

The keyless entry system consists of a portable remote control transmitter and a receiver mounted between the sun visors. System operation is based on a coded infrared signal from transmitter to the receiver. The transmitter is programmed into the receiver providing the correct programming sequence is met.

When keyless entry system is activated, the corresponding relay operates supply voltage to motors. The use of either relay determines the polarity of voltage that is supplied to door lock motors.

When keyless entry system is used, the transmitter sends a signal to keyless entry module. If doors are unlocked, the module activates a transistor switch to apply voltage to lock relay coil. The coil is energized to close the normally open contacts of lock relay. Battery voltage from relay is applied to door lock motors to lock the doors. Current flows in same path to ground as it does when master door lock switch is used.

When doors are locked, the keyless entry module applies voltage to unlock relay coil and a similar action takes place to unlock doors.