Body Control Module
The Body Control Module (BCM) controls the automatic door locks. Refer
to
Body Control System Operation
in Body Control System for more information.
All Door Unlock
The BCM unlocks all doors when pressing unlock once on either door lock
switch.
Pressing unlock on either door lock switch sends a ground signal to
the BCM through circuit 781. This action causes the BCM to supply voltage
from circuit 1540 to circuit 294 for 350)+/- 35) ms,
energizing all passenger door actuators and unlocking all passenger doors.
At the same time the BCM supplies voltage in circuit 694. This
action energizes the driver's door lock actuator and unlocks the driver's
door lock.
All Door Lock
| • | The BCM locks all doors when pressing lock once on either door
lock switch with all doors closed. |
| • | The BCM delays door locking when the drivers door is open with
the key removed from the ignition switch, thus enabling the last door closed
locking feature. A first press of lock on a door lock switch initiates
this feature. This causes the BCM to sound the chime 3 times, indicating
last door closed locking is active. Five seconds after all doors are closed,
the BCM locks all doors. Pressing lock twice on a door lock switch overrides
the last door closed locking feature, thus the BCM locks all doors immediately
with a door still open. |
| • | The BCM does not lock the doors when the driver's door is open
and the key is fully inserted in the ignition switch, Thu enabling the lockout
prevention feature. |
Pressing lock on either door lock switch sends a ground signal to the
BCM through circuit 780. When the BCM deems appropriate to lock the
doors (based on last door closed locking and lockout prevention features),
the BCM applies voltage from circuit 1540 to circuit 295
for 350 (+/- 35) ms, energizing all door actuators and locking all
vehicle doors.
Last Door Closed Locking
The BCM activates the last door closed locking feature when these conditions
are met:
| • | Last door closed locking mode is enabled. |
| • | A vehicle door is open (ground signal in circuit 49 or
727). |
| • | The key is removed from the ignition switch, thus disabling lockout
prevention (open signal in circuit 80). |
| • | Pressing lock once on a door lock switch or keyless entry transmitter. |
Upon pressing lock, the BCM to sound the chime 3 times. This provides
feedback indicating that the last door closed locking feature is active. 5
(+/- 0.5) seconds after all doors are closed, the BCM locks all
doors.
To cancel this feature:
| • | Press unlock on a door lock switch, or keyless entry transmitter. |
| • | Turn the ignition switch to the accessory or on position. |
To override this feature: Press lock twice. The BCM locks all door immediately
with a door still open.
Lockout Prevention
The BCM does not lock the vehicle doors when pressing lock on either
door lock switch with the lockout prevention feature active. The BCM activates
the lockout prevention feature when these conditions are met:
| • | A vehicle door is open (ground signal in circuit 49 or
727). |
| • | The key is fully inserted in the ignition switch cylinder (ground
signal in circuit 80). |
Automatic Door Locks
When the lockout prevention feature is active, the BCM disables these
automatic door lock features:
| • | Last door closed locking. |
| • | Keyless entry system lock. |
Lockout Prevention Override
To override the lockout prevention feature, press and hold lock on either
door lock switch for three seconds. This action causes the BCM to lock all
doors immediately.
Shift Into PARK Unlock
The BCM unlocks all doors when these conditions are met:
| • | Automatic door lock/unlock is in mode 3. |
| • | The ignition switch is on. |
| • | Transaxle is shifted into PARK by sensing a transaxle range PRNDL
signal via the Class 2 serial data link. |
The BCM unlocks the driver's door only when these conditions are met:
| • | Automatic door lock/unlock is in mode 4. |
| • | The ignition switch is on. |
| • | Transaxle is shifted into PARK by sensing a transaxle range PRNDL
signal via the Class 2 serial data link. |
Shift Out of PARK Lock
The BCM locks the doors when these conditions are met:
| • | Automatic door lock/unlock is in mode 2, 3 or 4. |
| • | All vehicle doors are closed (open signal in circuits 49
and 727). |
| • | The ignition switch is on. |
| • | Transaxle is shifted out of PARK or NEUTRAL by sensing a transaxle
range PRNDL signal via the Class 2 serial data link. |
