Challenger V8-5.7L (2010)
has been activated, the traction control indicator will be illuminated. The indicator remains illuminated until a traction control lamp-off message
from the CAB is received, or until the ignition switch is turned to the Off position, whichever occurs first.
The CAB continually monitors the traction control switch to determine the proper outputs to the components of the ABS. The CAB then sends the proper
traction control lamp-on and lamp-off messages to the instrument cluster.
TURN SIGNAL INDICATORS
The turn signal indicators give an indication to the vehicle operator that the turn signal (left or right indicator flashing) or hazard warning (both left and
right indicators flashing) have been selected and are operating. These indicators are controlled by transistors on the CCN electronic circuit board based
upon the cluster programming, a hard-wired multiplex input received by the cluster from the turn signal and hazard warning switch circuitry of the
multi-function switch on the turn/hazard switch mux circuit, and electronic messages received from the TIPM over the CAN data bus.
Each turn signal indicator LED is completely controlled by the CCN logic circuit, and that logic will allow this indicator to operate whenever the
instrument cluster receives a battery current input on the fused B(+) circuit. Therefore, each LED can be illuminated regardless of the ignition switch
position. The LED only illuminates when it is provided a path to ground by the CCN transistor. The CCN will turn on the turn signal indicators for the
following reasons:
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Turn Signal-On Input - The Steering Control Module (SCM) sends a Data Bus message to the TIPM to turn on the turn signals. The TIPM also
sends out a message to the CCN to illuminate the appropriate electronic turn signal switch indicator. The TIPM controls the output and the flash
rate for either the right or left turn signal lamps and sends this message to the CCN. The CCN will then control the illumination and flash rate of
the right or left turn signal indicators, as well as to control the click rate of an electromechanical relay soldered onto the CCN electronic circuit
board that emulates the sound emitted by a conventional turn signal flasher. The turn signals and the turn signal indicators continue to flash on and
off until the cluster receives a turn signal-off input from the multi-function switch, or until the ignition switch is turned to the Off position,
whichever occurs first.
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Hazard Warning-On Input - The turn signal flashers are also controlled by the TIPM. The SCM sends a Data Bus message to the TIPM and the
TIPM responds to these messages by controlling a battery voltage output and the flash rate for each of the right and left turn signal lamps. The
TIPM also sends the appropriate electronic messages back to the CCN to control the illumination and flash rate of the right and left turn signal
indicators, as well as to control the click rate of an electromechanical relay soldered onto the CCN electronic circuit board that emulates the sound
emitted by a conventional hazard warning flasher. The turn signals and the turn signal indicators continue to flash on and off until the cluster
receives a hazard warning-off input from the multi-function switch.
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Lamp Out Mode - The CCN also sends electronic turn signal on and off messages to the TIPM over the CAN data bus, and the TIPM flashes
the appropriate exterior turn signal lamps. If the TIPM detects an inoperative turn signal lamp or circuit, it increases the flash rate for the
remaining operative turn signals and sends an electronic message back to the instrument cluster. The instrument cluster then increases the flash rate
of the turn signal indicator(s) and the clicking rate of the electromechanical relay to provide an indication of the problem to the vehicle operator.
The CCN continually monitors the multi-function switch and electronic messages from the TIPM to determine the proper turn signal and hazard warning
system control.
TRANSMISSION RANGE INDICATOR
The electronic transmission range indicator gives an indication to the vehicle operator of the transmission gear that has been selected with the automatic
transmission gear selector lever. This indicator is controlled by the CCN circuit board based upon programming and electronic messages received from
the PCM over the CAN data bus.
The transmission range indicator information is displayed by a dedicated VFD unit soldered onto the CCN electronic circuit board, and the VFD will not
display the transmission range indicator information after the ignition switch is turned to the Off position. The CCN circuitry operates the transmission
range indicator VFD to provide the following features:
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Selected Gear Message - Each time the CCN receives a selected gear message from the PCM, a box will be illuminated around the appropriate
character in the gear selector indicator VFD. The box will remain illuminated until the cluster receives a different selected gear message, or until
the ignition switch is turned to the Off position, whichever occurs first.
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Communication Error - If the CCN fails to receive a selected gear message from the PCM within three seconds, the CCN circuitry will display
all gear selector positions boxed (selected) until a valid selected gear message is received or until the ignition switch is turned to the Off position,
whichever occurs first.
The PCM continually monitors a hard-wired multiplex input from the Transmission Range Sensor (TRS), then sends the proper selected gear messages
to the CCN.
The hard-wired indicator inputs may be diagnosed using conventional diagnostic tools and procedures. However, the CCN circuitry and electronic CAN
or LIN data bus message controlled indicators are diagnosed using the self-diagnostic CCN Self Test. See: Testing and Inspection. Proper testing of the
CAN or LIN data bus and the electronic data bus message inputs to the CCN that control each indicator requires the use of a diagnostic scan tool. Refer
to the appropriate diagnostic information.
