Part 2 of 2

Fig. 8 Washer Nozzle:

WASHER NOZZLE
The two washer nozzles have integral snap features and an anti-rotation tab that secure them in dedicated holes in the cowl plenum cover/grille panel located near the base of the windshield . The domed upper surface of the washer nozzle is visible on the top of the plenum cover/grille panel, and the nozzle orifice is oriented towards the windshield glass. The washer plumbing fittings for the washer nozzles are concealed beneath the cowl plenum cover/ grille panel. These fluidic washer nozzles are constructed of molded plastic. The cowl plenum cover/ grille panel must be removed from the vehicle to access the nozzles for service. The washer nozzles cannot be adjusted or repaired. If faulty or damaged, they must be replaced.

The two washer nozzles are designed to dispense washer fluid into the wiper pattern area on the outside of the windshield glass. Pressurized washer fluid is fed to each nozzle from the washer reservoir by the washer pump/motor unit through a single hose, which is attached to a barbed nipple on each washer nozzle below the cowl plenum cover/grille panel. The washer nozzles incorporate a fluidic design, which causes the nozzle to emit the pressurized washer fluid as an oscillating stream to more effectively cover a larger area of the glass area to be cleaned.

Fig. 10 Washer Pump/Motor:

WASHER PUMP/MOTOR
The washer pump/motor unit is located on the outboard side of the rearward facing surface of the washer reservoir, in the right front corner of the engine compartment. A small permanently lubricated and sealed electric motor is coupled to the rotor-type washer pump. A seal flange with a barbed inlet nipple on the pump housing passes through a rubber grommet seal installed in a dedicated mounting hole of the washer reservoir. When the pump is installed in the reservoir a barbed outlet nipple on the pump housing connects the unit to the washer system through a short washer reservoir hose.

The washer pump/motor unit is retained on the reservoir by the interference fit between the barbed pump inlet nipple and the grommet seal, which is a light press fit. The top of the washer pump is also secured to the washer reservoir by the use of a snap post on the motor housing and a snap post receptacle molded into the reservoir that allows for mounting of the washer pump without the use of fasteners. An integral connector receptacle on the top of the motor housing connects the unit to the vehicle electrical system through a dedicated take out and connector of the right headlamp and dash wire harness. The washer pump/motor unit cannot be repaired. If faulty or damaged, the entire washer pump/motor unit must be replaced.

The washer pump/motor unit features a Direct Current (DC) electric motor. The motor is connected to the vehicle electrical system through a single take out and two-cavity connector of the right headlamp and dash wire harness. Washer fluid is gravity-fed from the washer reservoir to the inlet side of the washer pump. When the pump motor is energized, the rotor-type pump pressurizes the washer fluid and forces it through the pump outlet nipple, the washer plumbing, and the washer nozzles onto the windshield glass.

The washer pump/motor is grounded at all times through a take out of the right headlamp and dash wire harness with a single eyelet terminal connector that is secured by a nut to a ground stud located on the right front fender inner shield in the engine compartment. The washer pump/motor receives battery current on a washer pump/motor control circuit through a high side driver within the Front Control Module (FCM) whenever the FCM receives an electronic message from the instrument cluster over the Programmable Communications Interface (PCI) data bus requesting washer system operation. The instrument cluster monitors a resistor multiplexed hard wired input from the momentary washer switch contacts within the multi-function switch on the steering column to determine when it should issue the electronic message requesting washer system operation.

The washer pump/motor unit can be diagnosed using conventional diagnostic tools and methods. However, conventional diagnostic methods may not prove conclusive in the diagnosis of the instrument cluster, the Front Control Module (FCM), or the electronic message inputs to or outputs from the instrument cluster and the FCM that control the operation of the washer pump/motor unit. The most reliable, efficient, and accurate means to diagnose the washer pump/motor unit, the instrument cluster, the FCM, or the electronic message inputs and outputs related to the washer pump/motor unit operation requires the use of a DRB III scan tool. Refer to the appropriate diagnostic information.

Fig. 12 Washer Reservoir:

WASHER RESERVOIR
The molded plastic washer fluid reservoir is mounted on the right rearward facing surface of the cooling module radiator shroud in the engine compartment. The reservoir is a molded unit constructed of a translucent plastic that allows the washer fluid level to be inspected without removing the washer reservoir cap. The most visible component of the washer reservoir is the filler cap unit, which is secured to and hinges on a hook feature that is integral to the filler neck near the top of the reservoir. The bright yellow plastic filler cap snaps over the filler neck opening and seals the reservoir opening with an integral rubber gasket. The filler cap is labeled with an International Control and Display Symbol icon for "Windshield Washer" and the text Washer Fluid Only" that are molded into it and highlighted in black against the yellow plastic cap for visibility.

There are dedicated holes near the bottom of the rearward facing side of the reservoir provided for the mounting of the washer pump/motor unit and the washer fluid level switch. A snap post receptacle molded into the reservoir allows for mounting of the washer pump without the use of fasteners. The reservoir also features an integral hose routing trough on its rearward facing side. The washer reservoir is secured to the cooling module radiator shroud with three integral tabs, two at the bottom and one at the top. The two bottom tabs are inserted into two slots near the bottom of the shroud, while the upper tab slides into an integral channel-like slot near the top of the shroud. A molded lock feature on the forward facing surface of the reservoir engages a molded depression on the rearward facing surface of the radiator shroud when the reservoir is fully seated on the shroud, locking the unit securely in place. On most models, a molded plastic coolant recovery container or a coolant pressure container must be detached from the top of the cooling module and moved aside to access the washer fluid reservoir for service. This may be accomplished without opening or draining the engine cooling system.

The washer fluid reservoir provides a secure, on-vehicle storage location for a large reserve of washer fluid for operation of the washer system. The washer reservoir filler neck provides a clearly marked and readily accessible point from which to add washer fluid to the reservoir. The washer/pump motor unit is located in a sump area near the bottom of the reservoir to be certain that washer fluid will be available to the pump as the fluid level in the reservoir becomes depleted. The washer pump/motor unit is mounted in the lowest position in the sump. The washer fluid level switch is mounted just above the sump area of the reservoir so that there will be adequate warning to the vehicle operator that the washer fluid level is low, well before the washer system will no longer operate.