Grand Cherokee 4WD V8-4.7L (2003)
Arming/Disarming - Active arming occurs when the remote keyless entry transmitter is used to lock the vehicle doors, whether the doors are open or
closed. If one or more doors are open, the arming sequence is completed only after all doors are closed.
Passive disarming occurs upon normal vehicle entry (unlocking driver's door with the key). This disarming also will halt the alarm once it has been
activated.
Active disarming occurs when the remote keyless entry transmitter is used to unlock the vehicle doors. This disarming also will halt the alarm once it
has been activated.
INTRUSION TRANSCEIVER MODULE (Export Only)
The Body Control Module (BCM) along with an Intrusion Transceiver Module (ITM) will control the premium Vehicle Theft Security System
(VTSS) on export vehicles. Premium VTSS also includes a battery-backed siren for the audible alert. In addition to the other features of the base
VTSS the ITM is used to monitor the interior of the vehicle for movement while the alarm is set. This feature can also be disabled with three
additional lock commands from the Remote Keyless Entry system (which will be confirmed with an audible chirp) during the VTSS pre-arming
sequence.
When the alarm is tripped it will actuate the hazard lamps for twenty-five seconds and the siren 28 seconds. After that period if the disturbance is still
present only the siren will be activated again for 28 seconds with five seconds intervals between warning cycles. This will continue up to ten times
unless the disturbance goes away. Also while the alarm is set the siren will monitor it's Fused B(+) and Siren Signal Control circuits. If either of these
circuits become open the siren will trip itself to the alarming state.
NOTE:
-
The intrusion transceiver module and/or siren must never be swapped from one vehicle to another. Once connected to a particular vehicle they
will only properly function for that vehicle.
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If the VTSS indicator lamp comes on after ignition on and stays on, the PCI bus communication with the powertrain control module possibly
has been lost.
Windshield Wiper & Washer
WINDSHIELD WIPER & WASHER
FRONT WIPER
System Description
The front wiper system consists of the following features: lo-speed, hi speed, mist wipers, intermittent wiper rain sensitive wipers (if equipped) and
wipe after wash. The front wiper system is only active when the ignition is in the run/acc position.
The BCM controls the front wiper system with one low-going output to a relay. With this output the BCM determines the motor wipe rate. This rate is
a function of the intermittent wiper switch position and vehicle speed. The BCM times the delay after the wipers have parked. If the driver goes from a
longer to a shorter delay interval, a wipe is done immediately. The speed sensitive delay is set based on the current speed of the vehicle. If the vehicle
crosses above the speed threshold of 10 mph (16 kmh) while the intermittent wiper delay is occurring, a smaller delay can be used. If the vehicle
crosses below the speed threshold a longer delay should not be used until the current delay is completed.
In the lo-speed and mist state, the BCM constantly outputs an active control signal for a delay of zero. The BCM also controls the wiper motor
high/low relay which selects the motor winding to be energized. So when hi-speed is selected, the BCM energizes the hi-speed winding. The mist
position is a momentary input to the BCM which causes the wipers to operate at low speed as long as the mist input is present.
The BCM also monitors the front washer motor to perform wipe after wash. The BCM will perform 3 wipes after the wash input is released.
Since the front wiper system is an important safety feature, the BCM will support wiper operation in the event of a failed park input.
If BCM does not detect a change of state on the park input for 8 seconds with the wiper relay energized a Diagnostic Trouble Code will set in the
BCM.
Once a failed park switch is detected, intermittent operation is disabled and the BCM will default to the low speed wiper state when the wiper switch is
in the intermittent position. The wiper relay will be de-energized when the wiper mode switch is in the OFF position. For open and short states on the
wiper mode switch, the wipers should default to OFF.
SYSTEM FEATURES
Rain Sensor Module
The Microprocessor-based Rain Sensor Module (RSM) senses moisture on the outside of the windshield glass, and sends a wipe command to the
Body Control Module (BCM). The RSM sends a wipe command to the BCM over the PCI data bus. The BCM then activates or deactivates the front
wiper system. Sensitivity inputs are based on the driver-selected settings on the right side multi- function switch.
Speed Sensitive Intermittent Wipe Mode
