RAM 1500 Van V8-5.2L CNG VIN T (1999)
Body Control Module: Description and Operation
Chime System
Chime System
The chime system is build into the CTM. The system also supports an external chime request from the instrument cluster. This feature allows the
instrument cluster to request a chime from the CTM for gauge problems and tell tale warnings. The CTM chime functions will have priority over
the MIC chime requests. There are two chime rates, Low; 50 chimes per minute for reminders and High; 180 chimes per minute for serious
conditions that require immediate attention. The high rate chime sounds when the key is left in the ignition and the driver door is open or the
headlights are left ON. The low rate chime sounds for any of the other conditions. There is a variable rate feature that allows the chime to sound
continuously for the key-in, and headlamp warning, as long as the drivers door is open. The seat belt warning chime is activated for 4 to 6 seconds
, and all other chime conditions will activate the chime once at the same time the warning light ON the cluster is illuminated.
The chime will sound for the following conditions:
High rate
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Key in Warning ignition off, key in ignition, driver's door open
-
Ignition off, headlamps ON, driver's door open
Low rate
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Seat belt warning - 6 seconds after key on (6 to 8 chimes) or until seatbelt is buckled
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Airbag lamp illuminated (3 times after prove-out)
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ABS lamp illuminated (2 chimes after prove-out if equipped)
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Check engine lamp illuminated (2 chimes after prove-out)
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Check gauges lamp illuminated (2 chimes)
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Engine Temp High - when gauge enters red zone (2 chimes)
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Low fuel - when fuel level reaches 1/8 tank (2 chimes)
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Low washer fluid (2 chimes)
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Transmission Temperature High (2 chimes)
If the ignition switch is turned to the RUN/START position and the driver's door is closed, then opened, the warning chime is defeated. This
allows the doors to be open without the warning chime constantly sounding. The CTM stays in this mode until the ignition switch is turned to the
OFF position, then normal function will be restored.
