Grand Cherokee 2WD V8-5.2L VIN Y (1998)
module monitors circuits or systems and sends a CCD request for a chime from the BCM. The BCM is constantly monitoring the CCD bus for a
chime request message. If a MIC or VIC monitored system requires a chime to sound, the request for the chime will come from the MIC or VIC,
but the BCM will actually sound the chime.
The chime will sound for the following conditions:
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Check Engine Warning
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Check Gauges Warning
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Door ajar above critical speed
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Headlamp ON with ignition OFF and driver door open
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High Speed Warning - Gulf Coast Countries
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Hood Ajar
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Key in ignition with ignition OFF and driver door open
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Low Fuel Warning-less than 1/8 tank of fuel remaining
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Rear Lamp Failure
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Seatbelt warning
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Transmission Over Temp Turn signal on for more than 1.0 mile with no decrease in speed or TPS.
-
Washer Fluid Low
Compass Mini-Trip Computer (CMTC)
COMPASS/MINI-TRIP COMPUTER
The Compass/Mini-Trip Computer (CMTC) is located in the overhead console. It displays the following information:
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Compass direction.
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Current outside temperature.
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Average fuel economy (AVG ECO).
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Instantaneous fuel economy (ECO).
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Elapsed time (ET).
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Distance to empty (DTE).
-
Trip odometer (ODO).
All of the information required by the CMTC except the dimming level, is transmitted over the CCD bus from the Body Control Module (BCM)
or Powertrain Control Module (PCM).
NOTE: If the CMTC has been replaced, it may be necessary to recalibrate.
Description and Functional Operation
SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION
The body system consists of a combination of modules that communicate over the CCD bus (Chrysler Collision Detection multiplex system). All
of the information about the functioning of all the systems is organized, controlled, and communicated by the CCD bus.
Through the CCD bus, information about the operation of vehicle components and circuits is relayed quickly to the appropriate module(s). All
modules receive all the information transmitted on the bus even though a module may not require information to perform its function. It will only
respond to messages "addressed" to it through a binary coding process. This method of data transmission significantly reduces the complexity of
the wiring in the vehicle and the size of wiring harnesses.
Airbag Diagnostic Trouble Codes
AIRBAG DIAGNOSTIC TROUBLE CODES
AECM Accelerometer
AECM Output Driver Circuit Open
AECM Stored Energy Driver
AECM Stored Energy Logic
AECM Stored Energy Passenger
Driver Squib Circuit Open
Driver Squib Circuit Shorted
Either Squib Term Shorted to Battery
Either Squib Term Shorted to Ground
Internal Diagnostics 1
Internal Diagnostics 2
Internal Diagnostics 3
Internal Diagnostics 4
Loss of Ignition Run/Start
Loss of Ignition Run Only
No CCD Communication
Passenger Squib Circuit Open
Passenger Squib Circuit Shorted
Safing Sensor Shorted
Warning Lamp Circuit Open/Shorted
