SRX AWD V6-3.0L (2010)
Power Locks: Description and Operation
Power Door Locks Description and Operation
Door Lock System Components
The power door lock system consists of the following components:
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Central door lock switch
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Child security lockout switch
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Child security lockout indicator
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Body control module (BCM)
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Driver door latch
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Passenger door latch
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Left rear door latch
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Right rear door latch
Door Lock System Controls
The power door lock system can be controlled by any of the following:
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Central door lock switch activation
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Keyless entry lock or unlock command (Active)
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Keyless entry lock or unlock command (Passive)
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A door lock cylinder switch Unlock actuation
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Delayed locking command
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Automatic door lock command
Door Lock and Unlock Operation
When the central door lock switch is activated in the lock or unlock position the BCM will receive a ground 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 supply battery voltage to the door lock actuator lock or unlock control circuits. Since
the opposite side of the lock actuator is connected to ground through the other lock actuator control circuit, the doors, fuel filler door (if equipped) and
liftgate will then lock or unlock as commanded.
The following three circuits are used to operate the lock:
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Driver door unlock
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Passenger door unlock
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All door lock
The driver door lock actuator is isolated so it can be unlocked by itself using the keyless entry transmitter.
Automatic Door Lock Operation
This BCM-controlled feature can be personalized to driver preference.
The BCM will automatically lock the vehicle doors if the following conditions exist:
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All vehicles doors are closed.
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The ignition is in the ON position
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The vehicle is shifted out of Park.
The BCM will then unlock the doors when vehicle is shifted back into Park.
Power Door Dead Lock Operation
Vehicles equipped with the dead lock feature includes an additional reversible dead lock motor contained within each door latch assembly. Each dead
lock motor is wired to the BCM through 2 control circuits; the door dead lock control circuit and the door latch actuator unlock control circuit. To dead
lock a door, the door locks are activated by momentarily applying voltage to the door dead lock control circuits to the DOOR LK SEC relay, and ground
to the door latch actuator unlock control circuits. Ground to the dead bolt actuators is provided through the door lock actuator unlock control circuits.
Once the doors are dead locked, the mechanical lock/unlock linkage within the door lock actuator is physically disconnected so that the door can not be
opened even when the door is manually unlocked.
