Wipers/Washers - Description

DESCRIPTION

FRONT WIPER AND WASHER SYSTEM

A front wiper and washer system is standard factory-installed safety equipment on this model. The front wiper and washer system is an electrically operated intermittent system that utilizes major components:

- Body Control Module - The Body Control Module (BCM) is located on the bulkhead under the driver side end of the instrument panel. Description.
- Integrated Power Module - The Integrated Power Module (IPM) is located in the engine compartment on the driver side next to the battery. The IPM receives messages over the Programmable Communication Interface (PCI) bus from the BCM and uses the information to appropriately control the front wiper functions and both the front and rear washer motors. The IPM does not control the rear wiper functions except for the rear washer pump motor.
- Front Check Valve - The front washer system check valve is integral to the wye (Y) fitting located on the underside of the hood panel.
- Front Washer Nozzle - Two fluidic front washer nozzles are secured with integral snap features to dedicated openings in the hood panel, toward the rearward edge.
- Front Washer Plumbing - The plumbing for the front washer system consists of rubber hoses and molded plastic fittings. The plumbing is routed along the right side of the engine compartment from the washer reservoir, and up to the hood panel to the front washer nozzle fittings.
- Front Washer Pump/Motor - The front washer pump/motor unit is located in a dedicated hole on the lower outboard side of the washer reservoir, behind the inner fender liner ahead of the left front wheel.
- Front Wiper Arm - The two front wiper arms are secured with nuts to the threaded studs on the ends of the two wiper pivot shafts, which extend through the cowl plenum cover/grille panel located near the base of the windshield.
- Front Wiper Blade - The two front wiper blades are secured to the two front wiper arms with an integral latch, and are parked on the glass near the bottom of the windshield when the front wiper system is not in operation.
- Front Wiper Module - The front wiper pivot shafts are the only visible components of the front wiper module. The remainder of the module is concealed within the cowl plenum beneath the cowl plenum cover/grille panel. The front wiper module includes the wiper module bracket, four rubber-isolated wiper module mounts, the front wiper motor, the wiper motor crank arm, the two wiper drive links, and the two front wiper pivots.
- Right Multi-Function Switch - The right (wiper) multi-function switch is secured to the right side of the multi-function switch mounting housing near the top of the steering column, just below the steering wheel. Only the control stalk for the right multi-function switch is visible, while the remainder of the switch is concealed beneath the steering column shrouds. The right multi-function switch contains all of the switches and control circuitry for both the front and rear wiper and washer systems.
- Washer Reservoir - The washer reservoir is concealed between the left inner fender shield and the left outer fender panel, behind the inner fender liner and ahead of the left front wheel. The washer reservoir filler neck is the only visible portion of the reservoir, and it is accessed from the left front corner of the engine compartment.

OPERATING MODES

The components of the front wiper and washer system are designed to provide the following operating modes:

- Continuous Wipe Mode - The control knob on the control stalk of the right (wiper) multi-function switch has two continuous wipe positions, Low and High. When selected, these switch positions will provide input to the BCM which will in turn send a bus message to the IPM to operate the two-speed front wiper motor to operate in a continuous low or high speed cycle.
- Headlamps On With Wipers Mode - The BCM provides an automatic headlamps on with wipers feature. This is a customer programmable feature. If this feature is enabled, the headlamps will turn on automatically whenever the windshield wipers are turned on; and, if the headlamps were turned on automatically when the wipers were turned on, they will also turn off automatically when the wipers are turned off. If this feature is enabled, when the automatic wiper mode is selected the headlamps will turn on automatically only after the wipers complete three automatic wipe cycles within about thirty seconds, and they will turn off automatically after three minutes elapse without any automatic wipe cycles.
- Mist Wipe Mode - The control stalk of the right (wiper) multi-function switch has a momentary Mist position. When selected, this switch position will provide input to the BCM which will in turn send a bus message to the IPM to operate the front wipers in a low speed continuous cycle for as long as the switch is held closed, then will complete the current wipe cycle and park the front wiper blades near the base of the windshield when the switch is released.
- Speed Sensitive Intermittent Wipe Mode - The internal circuitry of both the right (wiper) multi-function switch, the BCM and the IPM provide an intermittent wipe mode with five delay interval selections. When this mode is selected, the BCM sends a bus message to the IPM to automatically adjust each of the five manually selected delay intervals between complete wipe cycles to compensate for vehicle speed.
- Washer Mode - When the momentary front wash position of the control stalk for the right (wiper) multi-function switch is selected with the front wiper system operating in a continuous wipe mode, washer fluid will be dispensed onto the windshield glass through the washer nozzles for as long as the washer switch is held closed. When the front washer switch is actuated with the front wiper system operating in an intermittent wipe mode, washer fluid is still dispensed until the switch is released; however, the front wipers will operate in a low speed continuous cycle from the time the washer switch is closed until several wipe cycles after the switch is released, before returning to the selected intermittent wipe mode.
- Wipe-After-Wash Mode - When the momentary front wash position of the control stalk for the right (wiper) multi-function switch is selected with the front wiper system turned OFF, the BCM provides a message to the IPM to operate the wipe-after-wash feature. When selected, this feature will operate the front washer pump/motor and the front wipers for as long as the front washer switch is held closed, then provide several additional wipe cycles after the switch is released before parking the front wiper blades near the base of the windshield.

REAR WIPER AND WASHER SYSTEM

An electrically operated fixed interval intermittent rear wiper and washer system includes major components:

- Rear Washer Nozzle - The rear washer nozzle is secured by a snap fit into a mounting hole in the liftgate spoiler assembly, above the liftgate glass. The check valve is mounting in line between the liftgate opening and liftgate.
- Rear Washer Plumbing - The plumbing for the rear washer system consists of rubber hoses and molded plastic fittings. The plumbing is routed along the left side of the engine compartment from the washer reservoir, through the dash into the passenger compartment, down the right side, up the right D-pillar, to the rear roof header. The plumbing is then routed through grommets in the rear roof header and the liftgate inner panel, then into the liftgate spoiler assembly to the fitting for the rear washer nozzle.
- Rear Washer Pump/Motor - The rear washer pump/motor is located in a dedicated hole on the lower outboard side of the washer reservoir, ahead of the left front wheel housing. The rear washer pump mounting hole is located higher on the reservoir than the front washer pump mounting hole.
- Rear Wiper Arm - The single rear wiper arm is secured by a nut directly to the rear wiper motor output shaft, which extends through the center of the liftgate outer panel near the base of the liftgate glass.
- Rear Wiper Blade - The single rear wiper blade is secured to the rear wiper arm with an integral latch, and is parked off of the liftgate flip-up glass when the rear wiper system is not in operation.
- Rear Wiper Motor - The rear wiper motor output shaft is the only visible component of the rear wiper motor. The remainder of the motor is concealed within the liftgate.
- Right Multi-Function Switch - The right (wiper) multi-function switch is secured to the right side of the multi-function switch mounting housing near the top of the steering column, just below the steering wheel. Only the control stalk for the right multi-function switch is visible. The remainder of the switch is concealed beneath the steering column shrouds. The right multi-function switch control stalk is dedicated to providing all of the driver controls for both the front and rear wiper and washer systems.
- Washer Reservoir - The rear washer system shares a single reservoir with the front washer system, but has its own dedicated washer pump/motor and plumbing. The washer reservoir is concealed between the left inner fender shield and the left outer fender panel, behind the inner fender liner and ahead of the left front wheel. The washer reservoir filler neck is the only visible portion of the reservoir, and it is accessed from the left front corner of the engine compartment.

OPERATING MODES

The components of the rear wiper and washer system are designed to work in concert to provide the following operating modes:

- Continuous Wipe Mode - When the right multi-function switch control sleeve is moved to the On position, the rear wiper will be operated at a fixed speed, continual wipe cycle until the switch sleeve is moved to the Delay or Off positions or until the ignition switch is turned to the Off position.
- Intermittent Wipe Mode - When the right multi-function switch control sleeve is moved to the Delay position, the rear wiper will be operated in a fixed interval, intermittent wipe cycle until the switch sleeve is moved to the On or Off positions, until the ignition switch is turned to the Off position, or until the right multi-function switch control stalk is pushed forward to activate the rear washer system. The intermittent wipe mode delay time has a fixed delay interval of about five to eight seconds between sweeps.
- Washer Mode - When the right multi-function switch control stalk is pushed forward to activate the rear washer system, the BCM will send a bus message to the IPM to turn on the rear washer pump motor and washer fluid will be dispensed from the washer reservoir onto the liftgate glass through the rear washer nozzle and the rear wiper will operate in a fixed cycle (not intermittent) for as long as the rear washer pump/motor unit remains energized.
- Wipe-After-Wash Mode - When the right multi-function switch control stalk is released from the momentary Wash position, the wipe-after-wash feature will continue to operate the rear wiper at a fixed cycle for about three additional wiper sweeps before returning to the previously selected mode.