Dodge ZB 2005, Service Manual

Page: 1389 / 1873

NOTE: Do not swap the body control module
between vehicles or body control modules
off the shelf.
Engineering does not recommend that service,
dealers or the plant swap Body Control Modules
(BCM) between vehicles or off the shelf. The BCM
has internal diagnostic capability that assists in
diagnosing the system. When an “Open” or a
“Short” circuit exists, the DRBIII
t
can be used to
read the BCM codes. The codes are very descriptive
in identifying the appropriate feature that has
faulted.
3.3.1 BATTERY SAVE FEATURE
The Battery Save feature provides the customer
with the ability to conserve battery power when
storing the vehicle for long periods of time without
losing radio/Engine Controller memory. This is an
alternative to disconnecting the battery. When the
feature is performed, the driver door exterior han-
dle is the only wakeup circuits available. RKE and
the exterior passenger door handle is disabled while
the BCM is in Sleep Mode. The driver door key
cylinder unlock switch and the interior door han-
dles is an alternative mechanical way of entering
the vehicle. When the driver door outside handle is
pressed, then the BCM exits Sleep Mode and will
allow all features (except interior and exterior light-
ing) to work. The BCM will re-enter Sleep Mode 30
seconds after all doors are closed. Battery Save
Mode is cancelled when the ignition is cycled to
RUN.
3.3.1.1 CUSTOMER NORMAL OPERATING
MODE
The customer starts the battery save feature by
doing the following:
•
Insert key into ignition switch.
• Cycle the ignition switch from Off to Accessory
four times without going into RUN.
•
Leave the switch in the OFF position after the
fourth cycle without removing the key. This puts
the BCM into the learn mode.
• The customer then depresses the driver’s side
Power Door Lock switch in the UP direction.
• A horn chirp will tell the customer that the
process has begun.
•
All interior and exterior lights (if on) will be
turned off.
• Key may be removed or left in at this point.
•
VTSS may be armed before Sleep Mode by using
the RKE or the door lock switch.
The customer can exit battery save mode by doing
the following:
• Press the Driver door outside handle (this will
wakeup the vehicle).
•
If the door did not open, then the vehicle must be
locked-press the RKE Unlock.
• Press the Driver door outside handle.
•
Cycle the ignition key to RUN-this will cancel the
feature.
• If the ignition is not cycled to RUN, then the BCM
will re-enter Sleep Mode 30 seconds after the last
door is closed.
3.3.1.2 SHIPPING OPERATING MODE
To conserve battery power when the vehicle is
shipped, the BCM will enter Battery Save Mode
immediately after it goes to sleep. This is providing
the following is performed:
• Radio IOD fuse is pulled (this will set a Radio Bus
Communication DTC).
• Ignition has been cycled to run or accessory.
• Ignition is in Lock (with or without key in the
ignition switch).
• Dome lamps will cancel.
•
Headlamp Battery Save will be performed.
• Accessory delay will be cancelled.
•
The BCM has recorded less than 50 vehicle miles.
• VTSS may be armed before Sleep Mode by using
the RKE or the door lock switch.
•
Cycling the ignition to RUN will reset the BCM.
3.4 CHIME WARNING SYSTEM
The Instrument Cluster monitors the PCI bus
and based on information from various modules,
will request chimes from the BCM as well as
illuminating warning indicators. The BCM moni-
tors the door/decklid ajar switches, multifunction
switch, ignition switch, PCI bus, and the DRBIII
t
to perform various chime operations. The BCM uses
a hardwire low-side driver to control the chime
located in the cluster. The chime system provides
the Driver with warning announcements for:
• Seat belt Reminder
• Exterior lights on
• Key-in Ignition
• Key-in Accessory
•
Engine coolant temperature high or critical
• Dome light on
•
Low engine oil pressure
• Engine oil temperature high or critical
•
Charging System faults
• Low Fuel Warning
•
Any warning lamp announcement
8
GENERAL INFORMATION