Caravan FWD L4-2.4L VIN X (1997)
Audible Warning Device: Description and Operation
Dome Lamp on Chime
CIRCUIT OPERATION
The dome lamp ON chime is used to indicate to the operator that the dome lamps are ON with the drivers door OPEN.
Circuit G75 is used for the input to the Body Control Module (BCM) that the driver's door is ajar. This switch is normally OPEN with the door
closed. When the door is OPEN a path to ground is completed through the case grounded switch.
Circuit M32 is used for the dome lamp ON input to the BCM. This circuit connects from the BCM to the headlamp switch. When the dome lamps
are ON a ground path is completed through the switch to circuit Z1
Engine Temperature Critical Chime
CIRCUIT OPERATION
The engine coolant temperature critical chime is used to alert the operator that the coolant temperature has risen above a pre-determined level.
The Body Control Module (BCM) monitors coolant temperature from information received across the CCD bus from the PCM.
Chime System
The chime system provides the driver with two types of chimes: warning and announcement:
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Warning chimes are provided for dome lamps on, engine temperature lamp, exterior lamps on, key-in ignition, low oil pressure, and turn signal
on (greater than one mile above 15 mph).
The warning chime will sound continuously until the condition is removed or the battery protection stops the chime (3 or 4 minutes). The
drivers seat belt unfastened chime will sound for approximately six seconds or until the seat belt is fastened.
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The announcement chime will act as a warning to the driver to scan the instrument cluster to observe which lamp is illuminated.
The announcement chime will sound one time whenever the generator lamp, low fuel, low washer fluid, door ajar, or liftgate ajar lamps are
first illuminated.
The door and liftgate ajar lamp announcement chime is only given if the vehicle speed is above 2 mph.
Diagnostics for the announcement chime are covered under the Instrument Cluster Warning Lamps diagnostics.
Exterior Lamp on Chime
CIRCUIT OPERATION
The exterior lamp ON chime is used to indicate to the operator that the lamps have been left ON with the key removed from the ignition, and the
driver's door OPEN.
Circuit G75 is used for the input to the BCM from the driver's door ajar switch. This switch is case grounded and normally OPEN with the door
closed.
Circuit G26 is used for the key-in ignition switch. This switch is normally OPEN with the key removed from the ignition. When the key is in the
ignition the switch completes a path to ground on circuit Z1.
Key-In Ignition on Chime
CIRCUIT OPERATION
The key-in ignition chime is used to alert the operator that the key is in the ignition with the ignition OFF and the driver's door ajar.
Circuit G75 is used for the input to the BCM from the driver's door ajar switch. This switch is case grounded and normally OPEN with the door
closed.
Circuit G26 is used for the key-in ignition switch. This switch is normally OPEN with the key removed from the ignition. When the key is in the
ignition the switch completes a path to ground on circuit Z1.
Low Oil Pressure Chime
CIRCUIT OPERATION
The low oil pressure chime is used to indicate to the operator that the oil pressure has fallen below a pre-determined pressure.
Circuit G6 is used as the input to the Body Control Module (BCM). This circuit connects from the low oil pressure lamp in the instrument cluster
and the oil pressure switch.
The oil pressure switch is normally OPEN with normal oil pressure. If the oil pressure is to low the switch completes a path to ground. This
illuminates the lamp in the instrument cluster and the BCM activates the chime.
