Operation

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 provides resistor multiplexed return outputs to indicate the selected switch positions. The switch 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.

The right multi-function switch can be diagnosed using a diagnostic scan tool and the appropriate diagnostic information.

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:

- 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 right multi-function switch sends electronic switch status messages over the CAN data bus to the other electronic modules in the vehicle.
- 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 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 right multi-function switch sends an electronic switch status message over the CAN bus to the other electronic modules in the vehicle.
- Front Washer Control - The right multi-function switch control stalk is pulled rearward towards the steering wheel to a momentary 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 right multi-function switch sends an electronic switch status message over the CAN bus to the other electronic modules in the vehicle.
- 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 right multi-function switch 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.
- Rear Washer Control - The right multi-function switch control sleeve is rotated to one of two momentary 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. right multi-function switch 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.