Grand Cherokee 2WD Limited V8-4.7L (2002)
CHIME SYSTEM
The chime system responds to requests from five modules: the Body Control Module (BCM), Electronic Vehicle Information Center (EVIC),
Mechanical Instrument Cluster (MIC), Sentry Key Immobilizer Module (SKIM) and the Powertrain Control Module (PCM). Each module
monitors its related systems and, via the PCI bus, requests the BCM to sound its internal chime as needed.
The chime will sound for the following conditions:
MIC Requested Chime Messages
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Airbag
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Check Gauges: Charging Voltage Low
Coolant Temp High
Low Oil Pressure
Charging Voltage High
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Low Fuel
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ABS
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Low Battery Voltage
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Water in Fuel (Diesel)
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Low Coolant level (Diesel)
BCM Initiated Chime Messages
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Headlamp ON with ignition OFF and driver door open
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Key in ignition with ignition OFF and driver door open
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Seat Belt Warning
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Overspeed Warning (Gulf Coast Countries Only)
EVIC Chime Requested Messages
When the following messages are displayed the EVIC will send a chime request to the BCM. The BCM will respond with a series of chimes.
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Turn signal ON for more than 1.0 mile
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Service reminder
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Coolant level low
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Washer fluid low
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Tire Pressure Monitoring System alert messages (if equipped)
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Door or liftgate ajar (when critical speed is reached)**
**CRITICAL SPEED CHART
Sentry Key Immobilizer System
The Sentry Key Immobilizer System (SKIS) also uses tactile beep support from the chime warning system. The Sentry Key Immobilizer Module
(SKIM) is programmed to send chime request messages over the Programmable Communications Interface (PCI) data bus to the Body Control
Module (BCM) to provide audible confirmation that:
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the SKIM has been successfully placed in the Customer Learn mode.
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A new Sentry key transponder has been successfully programmed by the SKIM.
See the owner's manual in the vehicle glove box for more information on the features, use and operation of the SKIS. Refer to Sentry Key
Immobilizer System in the Description and Operation of the service information - Vehicle Theft/Alarm systems for more information on the SKIS.
For diagnostic information, refer to the Powertrain Diagnostic Information.
DOOR AJAR SYSTEM
The door ajar, liftgate ajar, and the liftgate flip-up ajar states are used as inputs for various control modules on the vehicle. The DRB III will
display the state of the door ajar, liftgate ajar, and liftgate flip-up ajar switches in Inputs/Outputs. It's important to note, that when a door, liftgate,
or liftgate flip-up is closed, the switch state on the DRB III will show OPEN, and when the door, liftgate, or liftgate flip-up is open, the switch
state will show CLOSED. During diagnosis, if a door, liftgate, or liftgate flip-up is closed and the DRB III displays the switch state as CLOSED, it
indicates a shorted ajar circuit. If the door, liftgate, or liftgate flip-up is open and the DRB III displays the switch state as OPEN, it indicates an
