Challenger V8-5.7L (2010)
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More Than Full Stop Input - Each time the CCN receives a fuel level sense input that indicates the fuel level in the fuel tank is more than the
Full gauge needle stop position, the gauge needle is moved to the low end of the gauge scale and the low fuel indicator is illuminated immediately.
This input would indicate that the fuel level sense input to the cluster is an open circuit.
The CCN continually monitors the fuel tank sending unit to determine the level of fuel in the fuel tank. The CCN then sends the proper fuel level
messages to other electronic modules in the vehicle over the CAN data bus.
Part 2
OPERATION
LOW OIL PRESSURE INDICATOR
The low oil pressure indicator gives an indication to the vehicle operator when the engine oil pressure reading reflects a condition requiring immediate
attention. This indicator is controlled by a transistor on the CCN circuit board based upon programming and electronic messages received from the PCM
over the CAN data bus.
The low oil pressure indicator LED is completely controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate
when the instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the LED will always be off
when the ignition switch is in any position except On or Start. The LED only illuminates when it is provided a path to ground by the CCN transistor. The
CCN will turn on the low oil pressure indicator for the following reasons:
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Engine Oil Pressure Low Message - Each time the CCN receives a message from the PCM indicating the engine oil pressure is about 4 psi (27.5
kPa) or lower, the low oil pressure indicator will be illuminated. The indicator remains illuminated until the CCN receives a message from the
PCM indicating that the engine oil pressure is above about 4 psi (27.5 kPa), or until the ignition switch is turned to the Off position, whichever
occurs first. The CCN will only turn the indicator on in response to an engine oil pressure low message if the engine speed is greater than zero.
The PCM continually monitors the engine oil pressure sensor to determine the engine oil pressure. The PCM then sends the proper engine oil pressure
messages to the CCN.
MALFUNCTION INDICATOR LAMP
The Malfunction Indicator Lamp (MIL) gives an indication to the vehicle operator when the PCM has recorded a DTC for an On-Board Diagnostics II
(OBDII) emissions-related circuit or component malfunction. The MIL is controlled by a transistor on the CCN circuit board based upon programming
and electronic messages received from the PCM over the CAN data bus. The CCN will illuminate the MIL indicator for about fifteen seconds each time
the ignition is turned to the ON position, during the bulb test.
The MIL LED is completely controlled by the CCN logic circuit, and that logic will only allow this indicator to operate when the instrument cluster
receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the LED will always be off when the ignition switch is in
any position except On or Start. The LED only illuminates when it is provided a path to ground by the CCN transistor. The CCN will also turn on the
MIL for the following reasons:
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MIL Lamp-On Message - Each time the CCN receives a MIL lamp-on message from the PCM, the indicator will be illuminated. The indicator
can be flashed on and off, or illuminated solid, as dictated by the PCM message. For some DTC's, if a problem does not recur, the PCM will send
a lamp-off message automatically. Other DTC's may require that a fault be repaired and the PCM be reset before a lamp-off message will be sent.
For more information on the PCM, and the DTC set and reset parameters, See: Powertrain Management/Computers and Control Systems/Testing
and Inspection/Initial Inspection and Diagnostic Overview/Emissions Control - Operation.
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Communication Error - If the CCN receives no messages from the PCM for ten consecutive message cycles, the MIL is illuminated by the CCN
to indicate a loss of bus communication. The indicator remains illuminated until a valid message is received from the PCM.
The PCM continually monitors the fuel and emissions system circuits and sensors to decide whether the system is in good operating condition. The PCM
then sends the proper lamp-on or lamp-off messages to the CCN. If the CCN turns on the MIL after the bulb test, it may indicate that a malfunction has
occurred and that the fuel and emissions systems may require service.
SEAT BELT INDICATOR
The seat belt indicator gives an indication to the vehicle operator of the status of the driver side front seat belt. This indicator is controlled by a transistor
on the CCN circuit board based upon cluster programming and a hard-wired input from the seat belt switch in the driver side front seat belt retractor
through the seat belt indicator driver circuit.
The seat belt indicator also includes a programmable enhanced seat belt reminder or "beltminder" feature that is enabled when the vehicle is shipped
from the factory. This beltminder feature can be disabled and enabled by the customer using a specific programming event sequence, or by the dealer
using a diagnostic scan tool.
The seat belt indicator LED is completely controlled by the CCN logic circuit, and that logic will only allow this indicator to operate when the instrument
cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the LED will always be off when the ignition
