Power Door Locks System Components
The power window system consists of the following components:
| • | The body control module (BCM) |
| • | Driver door lock cylinder switch |
| • | RF door lock cylinder switch |
| • | Liftgate door lock cylinder switch |
| • | Door lock actuator in each front door |
| • | Door lock actuator in each power sliding door, as equipped |
| • | Door lock actuator in liftgate door |
| • | Door lock system fuse into the BCM, PWR LOCK 20A fuse |
Door Lock System Controls
The power door lock system is controlled by the body control module (BCM) and can be activated by any one of the following:
| • | A door lock switch Lock or Unlock actuation |
| • | A door lock cylinder switch Lock or Unlock actuation |
| • | A keyless entry transmitter actuation |
| • | An automatic door lock actuation, a personalization function |
| • | An automatic door unlock actuation, a personalization function |
| • | A last door closed locking actuation, a personalization function |
Door Lock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the lock position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential
within the BCM, the door lock actuator motors transition to the Lock position.
Driver Door Unlock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground
potential within the BCM, the LF door lock actuator motor transitions to the unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door
unlock function, if programmed.
Passenger Door Unlock Operation
The passenger doors include the passenger front door, the passenger rear sliding doors, and the liftgate door. When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the door lock
actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuator motors. This is done so that the driver door may be unlocked separately from the passenger doors using a keyless entry transmitter
or an automatic door unlock function, if programmed.
Automatic Door Lock/Unlock
The automatic door lock/unlock function is a vehicle personalization feature with the following 6 programmable modes of operation:
| • | OFF: None of the doors will unlock when the vehicle is shifted into Park or the key is taken out of the ignition. |
| • | DRIVER: Only the drivers door will unlock when the vehicle is shifted into Park or the key is taken out of the ignition. |
| • | ALL: All of the doors will unlock when the vehicle is shifted into Park or the key is taken out of the ignition. |
| • | KEY-OUT: The doors will unlock when the key is taken out of the ignition. |
| • | PARK: The doors will unlock when the vehicle is shifted into Park. |
| • | DELAYED LOCKING: Allows the locking of the vehicle to be delayed until all of the vehicles doors have been closed for 5 seconds. |
Sliding Door Delayed Locking
The sliding door delayed locking function is a vehicle personalization feature. After the body control module (BCM) has detected that the sliding door is closed, the BCM will lock the doors after a 3 second delay. The sliding door delayed
locking function will be overridden if the BCM receives a door unlock input, a last door closed locking initiation, or if the BCM senses that the sliding door is open.
Lockout Prevention
This function is intended to prevent the vehicle operator from locking the doors if the key is left in the ignition and the driver door is open. The lockout prevention function can be overridden by the body control module (BCM) if the BCM receives a door
lock input for longer than 3 seconds.
Last Door Closed Locking
The last door closed locking function is a vehicle personalization feature that is intended to allow the doors to be locked while passengers are exiting the vehicle. When last door closed locking function is in Active Mode, the body control module (BCM)
will delay locking of the vehicle doors for 5 seconds after all of the doors have been closed. The last door closed locking function will be overridden if the BCM receives a door unlock input or a key in ignition input.
Key Cylinder Unlock
The body control module (BCM) will unlock all of the doors after detecting a door lock cylinder switch in the unlock position for greater than 1 second.
Key Cylinder Lock
The body control module (BCM) will lock all of the doors after detecting a door lock cylinder switch in the lock position.
