Chrysler 2005 Crossfire SRT6 Service Manual page 1022

8J - 68 INSTRUMENT CLUSTER - SERVICE INFORMATION
CAN BUS FUNCTIONAL DIAGRAM
FLEXIBLE SERVICE SYSTEM (FSS) INDICATOR
The Flexible Service System (FSS) indicator (2) draws
the attention of the driver to a particular service that is
due. The FSS indicator (2) is a mileage/time-activated
engine service system for recommended oil change
intervals. In addition to time (in days) and distance cri-
teria, other factors, such as extreme speeds or cold
starts that are in combination with short distances, are
taken into account for adjusting the programmed ser-
vice intervals. If the oil level drops below a warning
threshold, the remaining distance (1) or the remaining
time (1) and the tool symbol (2) are displayed. The
FSS indicator (2) has its own microprocessor in the
Instrument Cluster. The FSS indicator (2) obtains time
information from the digital clock integrated into the
Instrument Cluster. The other data required is obtained
via the CAN data bus from the Controller Antilock
Brake (CAB) and the Powertrain Control Module
(PCM).
The following are CAN Bus data inputs required
for FSS indicator operation:
• CAB supplied input: 4 wheel speed signals for calculating vehicle speed
• CAB supplied input: 4 wheel speed signals for calculating distance traveled
• PCM supplied input: Engine coolant temperature
• PCM supplied input: Engine speed
• PCM supplied input: Engine load
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