Keyless Entry: Description and Operation

Power supply and ground
BCM is connected to LCU01, LCU02, LCU03 and LCU04 as DATA LINE A-1 or A-2.
Power is supplied at all times
^ through 10 A fuse [No. [28], located in the fuse block (J/B)]
^ to key switch terminal (3).
When the key switch is in ON position (key is inserted in ignition key cylinder), power is supplied
^ through key switch terminal (4)
^ to BCM terminal (69).
When any of the four door switches is in OPEN position, ground is supplied
^ to BCM terminal (32) ((32), (33), (28))
^ through door switches body grounds.
When a door is unlocked, each door LCU terminal (5) receives a ground signal from terminal (2) of each door
unlock sensor.
Remote controller signal input
^ through window antenna
^ to BCM terminal (89)
The multi-remote control system controls operation of the
^ power door lock
^ trunk lid opener
^ panic alarm
^ hazard reminder

OPERATING PROCEDURE
BCM can receive signals from remote controller when key switch is in OFF position (key is not in cylinder). It then sends the signals to LCUs as DATA LINE A-1 or A-2.

Power door lock operation
^ Key switch OFF signal (key is not in key cylinder)
^ Door switch CLOSE signal (all doors closed)
The two above signals are already input into BCM. At this point, BCM receives a LOCK signal from remote controller. BCM will then send a LOCK signal
^ from its terminals (70) and (51) (DATA LINES A-1 and A-2)
^ to each door control unit (LCU) terminal (3).
When an UNLOCK signal is sent from remote controller once, driver's door will be unlocked.
Then, if an UNLOCK signal is sent from remote controller again within 3 seconds, all other doors will be unlocked. For detailed description, refer to "POWER DOOR LOOK - IVMS".

Hazard reminder
Power is supplied at all times
^ through 10 A fuse [No. [13], located in the fuse block (J/B)]
^ to multi-remote control relay terminals (1), (3) and (6).
When BCM receives a LOCK signal from remote controller, ground is supplied
^ to multi-remote control relay terminal (2)
^ through BCM terminal (2).
Multi-remote control relay is now energized and door lock actuators lock all doors. (Hazard warning lamps flash twice as a reminder.)

Trunk lid opener operation
Power is supplied at all times
^ through 20 A fuse [No. [26], located in the fuse block (J/B)]
^ to trunk lid opener actuator terminal (1).
When a TRUNK OPEN signal is sent from remote controller, if the trunk lid opener cancel switch is in the ON position, ground is supplied
^ to trunk lid opener actuator terminal (2)
^ through trunk lid cancel switch terminals (1), and (2) , and
^ through BCM terminal (109).
Then power and ground are supplied, trunk lid opener actuator opens trunk lid.

Panic alarm operation
Power is supplied at all times
^ through 7.5 A fuse [No. [14], located in the fuse block (J/B)]
^ to theft warning horn relay terminal (1) and theft warning lamp relay terminal (1).
Theft warning horn relay terminal (2) and theft warning lamp relay terminal (2) are connected to BCM terminal.
Multi-remote control system activates horn and headlamps intermittently when an ALARM signal is sent from remote controller to multi-remote control system
For detailed description, refer to "THEFT WARNING SYSTEM - IVMS".