Security And Locks; General Description; Power Door Locks Description And Operation - Suzuki XL7 2007 Service Manual

9F-1 Security and Locks:

Security and Locks

Power Door Locks Description and
Operation
Door Lock System Components
The power door lock system consists of the following
components:
• Driver door lock switch—Provides a switched voltage
signal to the body control module (BCM) for both lock
and unlock switch activations.
• Front passenger door lock switch—Provides a
switched voltage signal to the BCM for both lock and
unlock switch activations.
• Door lock relay—Located in the instrument panel (I/P)
fuse block and controls the locking of all doors and
liftgate.
• Door unlock relay—Located in the I/P fuse block and
controls the unlocking of the passenger doors and
liftgate.
• Driver door unlock relay—Located in the I/P fuse
block and controls the unlocking of the driver door.
• BCM—Class 2 module which requires programming
when replaced
• Reversible door lock actuators in each of the doors
• LOCK/MIRROR 10 A fuse—Located in the I/P fuse
block, supplies power for the door lock switches and
relays.
• DR LCK 20 A fuse—Located in the I/P fuse block,
supplies power to the relays.
Door Lock System Controls
The power door lock system can be controlled by any of
the following:
• Power door lock switch activation
• Keyless entry lock or unlock command
• Delayed locking command
• Automatic door lock command
• Lockout prevention command
• An air bag deployment

General Description

Door Lock and Unlock Operation
When a door lock switch is activated in the lock or unlock
position the body control module (BCM) will receive a
voltage signal on either the door lock switch lock or
unlock signal circuits.
The BCM, upon receipt of a lock switch lock or unlock
signal, will switch the appropriate lock relay control
circuit(s) to battery positive voltage. This will energize
the appropriate lock or unlock relay(s). The relay will
supply voltage to the door lock actuator lock or unlock
control circuits to one side of the lock actuator. Since the
opposing side of the lock actuators are connected to
ground through the other lock actuator control circuit and
the normally closed contacts of the lock or unlock relay,
the doors and liftgate will then lock or unlock
appropriately.
Three relays are used to operate the lock. Driver door
unlock, passenger door unlock and all door lock. This is
done to isolate the driver door lock actuator so it can be
unlocked by itself using the keyless entry transmitter.
Automatic Door Lock Operation
This body control module (BCM) controlled feature can
be personalized to driver preference.
The BCM will automatically lock the vehicle doors if the
following conditions exist:
• All vehicles doors are closed.
• The ignition is in the ON position.
• The vehicle is shifted out of PARK.
The BCM will then unlock the doors when the ignition is
placed in the OFF position.
Delayed Locking Operation
With any door open and a door lock switch is activated in
the lock position, the body control module (BCM) will
give three audible chimes. When the door is closed, the
BCM will cycle the internal door lock relay to lock the
doors after approximately five seconds. This feature can
be overridden by activating the door lock switch a
second time and the doors will lock even with a door
open.
Lockout Prevention Operation
The body control module (BCM) will lock all doors and
unlock the driver door with a door lock switch lock
activation if a vehicle door is open and the ignition key is
fully inserted in the ignition. The lockout prevention
feature can be overridden if a lock command is received
from the keyless entry system.
Unlock After Air Bag Deployment
This feature will unlock all of the vehicle doors 15
seconds after an air bag deployment.