Keyless Entry: Description and Operation
System DescriptionPOWER 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) ((37), (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 and horn 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
When BCM receives a LOCK signal from remote controller, BCM will then send a LOCK signal
- from its terminals (70) and (61) (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 LOCK - IVMS".
Hazard and horn 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) and
- through 15 A fuse (No. [64], located in the fusible link and fuse box)
- to horn relay terminal (1).
When BCM receives a LOCK or UNLOCK signal from remote controller, ground is supplied
- to multi-remote control relay terminal (2)
- through BCM terminal (6) and
- to horn relay terminal (2)
- through BCM terminal (41)
Multi-remote control relay and horn relay are now energized, and hazard warning lamps flash and horn sounds as a reminder.)
Hazard and horn reminder has a horn chirp mode and a non-horn chirp mode.
Operating function of hazard and horn reminder
How to change hazard and horn reminder
Horn chirp mode of hazard and horn reminder can be activated or deactivated by pressing LOCK and UNLOCK buttons of remote controller for more than 2 seconds at the same time. At this time, hazard warning lamps and horn turn on and off as follows.
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 without the ignition key inserted in the ignition key cylinder, 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 vehicle security horn relay terminal (1) and vehicle security lamp relay terminal (1).
Vehicle security horn relay terminal (2) and vehicle security lamp relay terminal (2) are connected to BCM terminal (15).
Multi-remote control system activates horn and headlamps intermittently when an ALARM signal is sent from remote controller to multi-remote control system without the ignition key inserted in the ignition key cylinder. For detailed description, refer to "VEHICLE SECURITY SYSTEM - IVMS".