Commander 4WD V8-4.7L VIN N (2006)
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Front Washer Mode - The right multi-function switch control stalk provides momentary switching for control of the front washer system
operation.
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Continuous Rear Wipers - The right multi-function switch control sleeve provides detent switching for a single continuous rear wiper mode.
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Intermittent Rear Wipe Mode - The right multi-function switch control sleeve provides detent switching for a single fixed interval intermittent
rear wiper mode.
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Rear Washer Mode - The right multi-function switch control sleeve provides two momentary switch positions for control of rear washer system
operation.
The right multi-function switch cannot be adjusted or repaired. If any function of the switch is ineffective, or if the switch is damaged, the entire switch
unit must be replaced.
OPERATION
The right (wiper) multi-function switch uses resistor multiplexing to control the many functions and features it provides using a minimal number of hard
wired circuits. The switch receives clean grounds from the Steering Control Module (SCM), then provides resistor multiplexed return outputs to the
SCM to indicate the selected switch positions. The SCM then sends electronic switch status messages over the Controller Area Network (CAN) data bus
to the other electronic modules in the vehicle and provides two hard wired driver outputs to control rear wiper motor operation.
If the SCM detects no inputs from the right multi-function switch, it transmits a Signal Not Available (SNA) status over the CAN data bus. The SNA
status signals the other electronic modules to implement a failsafe mode of operation for the front and rear wiper systems. The failsafe mode will
maintain the last selected front and rear wiper system operation for the remainder of the current ignition cycle, after which both wiper systems will
default to OFF.
The right multi-function switch can be diagnosed using conventional diagnostic tools and methods. However, the most reliable, efficient and accurate
means to diagnose this component requires the use of a diagnostic scan tool.
Following are descriptions of how the right multi-function switch is operated to control the many front and rear wiper and washer system functions and
features it provides:
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Front Wiper Control - The control knob on the end of the right multi-function switch control stalk is rotated to one of the two continuous wiper
detents, to one of five intermittent wiper or automatic wiper detents, or to the OFF position to select the front wiper mode. The SCM reads the
resistor multiplexed input from the right multifunction switch and sends electronic switch status messages over the CAN data bus to the other
electronic modules in the vehicle. On vehicles with optional automatic wipers, the Rain Sensor Module (RSM) responds to electronic sensitivity
level setting messages with electronic wipe command messages when the appropriate moisture levels are detected on the windshield.
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Front Wiper Mist Mode - The front wiper mist mode is requested when the right multi-function switch control stalk is depressed downward
towards the floor to a momentary MIST position. The front wiper motor will continue to operate, one complete cycle at a time, for as long as the
control stalk is held in this position. The SCM reads the resistor multiplexed input from the right multi-function switch and sends an electronic
switch status message over the CAN bus to the other electronic modules in the vehicle.
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Front Washer Control - The right multi-function switch control stalk is pulled rearward towards the steering wheel to a momentary WASH
position to activate the washer pump/motor in the front washer mode. The washer pump/motor will continue to operate for as long as the control
stalk is held in this position. The SCM reads the resistor multiplexed input from the right multi-function switch and sends an electronic switch
status message over the CAN bus to the other electronic modules in the vehicle.
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Rear Wiper Control - The rear wiper mode is selected when the right multi-function switch control sleeve is rotated to the continuous rear wipe
detent position, the fixed interval intermittent rear wipe detent position, or the OFF detent position. The SCM reads the resistor multiplexed input
from the right multi-function switch and sends an electronic switch status message over the CAN bus to the other electronic modules in the vehicle
and provides hard wired signal outputs to the rear wiper motor through two driver circuits.
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Rear Washer Control - The right multi-function switch control sleeve is rotated to one of two momentary WASH positions, either fully forward
or fully rearward, to activate the washer pump/motor in the rear washer mode. The washer pump/motor will continue to operate in the rear washer
mode until the control sleeve is released. The SCM reads the resistor multiplexed input from the right multi-function switch and sends an
electronic switch status message over the CAN bus to the other electronic modules in the vehicle and provides hard wired signal outputs to the rear
wiper motor through two driver circuits.
