Chrysler 1997 Stratus Convertible RHD Service Manual page 530

8W - 40 - 12
DESCRIPTION AND OPERATION (Continued)
above or fallen below the normal operating range.
When the Powertrain Control Module (PCM) deter-
mines a problem, a message is sent across the CCD
Bus to the Body Control Module (BCM).
The BCM processes this message and sends a sig-
nal on the CCD Bus to the instrument cluster for
lamp illumination. This lamp also is illuminated, for
a few seconds, when the ignition switch is moved
from the OFF to the RUN position as a bulb check.
ENGINE COOLANT TEMPERATURE LAMP
The engine coolant temperature lamp is used to
alert the operator that the coolant temperature has
risen above the normal operating range. When the
Powertrain Control Module (PCM) determines a
problem, a message is sent across the CCD Bus to
the Body Control Module (BCM).
The PCM receives coolant temperature information
from the engine coolant temperature sensor. This
sensor uses a variable resistor to send a signal to the
PCM indicating engine coolant temperature.
The BCM processes this message and sends a sig-
nal on the CCD Bus to the instrument cluster for
lamp illumination. This lamp also is illuminated, for
a few seconds, when the ignition switch is moved
from the OFF to the RUN position as a bulb check.
CRUISE (VEHICLE SPEED CONTROL) ENGAGED
LAMP
The CRUISE lamp is used to indicate to the oper-
ator when the vehicle speed control is engaged. The
signal to illuminate the lamp is carried over the CCD
Bus from the Body Control Module (BCM).
The BCM receives information on vehicle speed
control engagement from the PCM over the CCD
Bus. This lamp also is illuminated, for a few seconds,
when the ignition switch is moved from the OFF to
the RUN position as a bulb check. The bulb check
operation is controlled by the PCM.
AIRBAG WARNING LAMP
Illumination of the Airbag warning lamp is con-
trolled by the Body Control Module (BCM) and the
CCD Bus. When the Airbag Control Module (ACM)
detects a problem in the system it sends a signal on
the CCD Bus to the BCM. The BCM process the sig-
nal and illuminates the AIRBAG lamp in the instru-
ment cluster.
OIL PRESSURE LAMP
The low oil pressure lamp is used to alert the oper-
ator that engine oil pressure has dropped below a
predetermined pressure. The oil pressure switch uses
a switch that CLOSES when the pressure is below
the predetermined level. The switch is case grounded
to the engine block.
8W - 40 INSTRUMENT CLUSTER
Power for the lamp is supplied on the F18 circuit.
This circuit also powers the Anti-Lock lamp, located
internal to the cluster, high speed fan relay, A/C
Clutch relay, and the Powertrain Control Module
(PCM). This circuit is protected by a 10 amp fuse
located in cavity 9 of the Power Distribution Center
(PDC).
The ground side of the lamp is controlled by the G6
circuit. This circuit is connected from the instrument
cluster to the engine oil pressure switch.
RIGHT AND LEFT TURN SIGNAL INDICATORS
These lamps are used to indicate to the operator
which turn signal is ON. Power for the lamps is sup-
plied from the turn signal switch. The L60 circuit is
used for the right turn indicator, and the L61 is used
for the left turn indicator.
Ground for the lamps is provided on the Z1 circuit
and terminates at the instrument panel left side cowl
panel.
BRAKE WARNING LAMP
The brake warning lamp is used to alert the oper-
ator of a problem in the vehicles braking system.
This lamp also illuminates when the ignition switch
is turned to the START position to perform a self
check.
Power for the lamp is supplied on circuit F11. This
circuit is HOT when the ignition switch is in the
OFF, START, and RUN positions. The F11 circuit is
protected by a 10 amp fuse located in cavity 11 of the
junction block.
There are two switches used in this system and
they are wired in parallel form. A parking brake
switch, located on the parking brake mechanism, will
illuminate the lamp if the normally OPEN switch is
CLOSED. This switch is case grounded.
The second switch used is the brake warning lamp
switch. This switch in normally OPEN. When the
brake system pressure is below the predetermined
level the switch CLOSES and completes a path to
ground.
The G9 circuit is used to connect the switches to
the cluster. Grounding for the brake warning lamp
switch is completed on the Z1 circuit which termi-
nates at the left strut tower.
If the vehicle is built for sale in Canada the park-
ing brake switch is used for the Daytime Running
Lamp (DRL) system. For further information on the
DRL refer to Section 8W-50.
ABS WARNING LAMP
The ABS warning lamp is controlled by the Con-
troller Anti Lock Brake (CAB) and/or the Hydraulic
control unit. It is used to alert the operator of a prob-
lem in the ABS system. The G19 circuit from the
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