Jeep WK2 Grand Cherokee Headlamp Washers

By Jeep Experts

Availability (North America):

2013 Overland Summit fashions (Standard)

2014-2020 Summit fashions (Standard)

2015-2019 Overland High Altitude fashions (Standard, discontinued throughout 2019 mannequin 12 months)

2014-2020 SRT fashions (Standard)

2018-2020 Trackhawk fashions (Standard)

Availability (exterior North America):

2011-up chosen export fashions

Operation

The headlamp washer system is designed to supply the automobile operator with a handy, protected, and dependable technique of sustaining High Intensity Discharge (HID) headlamp lighting efficiency. The numerous elements of this method are designed to transform electrical power produced by the automobile electrical system into the hydraulic motion of the washer system to use washer fluid saved in an on-board reservoir to the lenses of the 2 entrance lamp models, eradicating extra accumulations of snow, ice, bugs, mud, or different minor particles from the entrance lamps that may be encountered whereas driving the automobile below quite a few varieties of inclement working situations.

The automobile operator initiates the headlamp washer system operate utilizing the management knob on the tip of the multi-function swap management stalk that extends from the left aspect of the steering column, just under the steering wheel. While the HID headlamps are turned ON, pushing the knob on the tip of the management stalk in the direction of the steering column past the actuation level for greater than about 100 milliseconds (0.10 second) prompts the headlamp washer pump/motor together with the entrance washer pump/motor. When the headlamp washer pump/motor unit is energized, hydraulic stress builds inside the headlamp washer system plumbing in opposition to the stress of the return spring in every headlamp washer nozzle. Sufficient stress causes the headlamp washer nozzles to telescope outward and to dispense excessive stress washer fluid onto the lenses of each entrance lamp models for about 1600 milliseconds (1.6 seconds).

Depressing the management knob in the direction of the steering column actuates the momentary entrance washer system swap, which selects the HEADLAMP WASH mode relying upon when and the way lengthy the swap is held closed. Headlamp washer system operation is totally managed by the Totally Integrated Power Module (TIPM) logic circuits primarily based upon digital wash command message inputs acquired from the Steering Control Module (SCM) inner to the Steering Column Control Module (SCCM) for all the wiper and washer system capabilities. The SCM then sends digital wiper swap and washer swap standing messages to the TIPM over the Controller Area Network (CAN) information bus requesting the suitable wiper and washer system working modes. The TIPM will solely enable this method to function when the ignition swap is within the ON place and the headlamp low beams are turned ON. The TIPM makes use of a excessive aspect driver to energise or de-energize the headlamp washer system relay which, in flip, controls the operation of the headlamp washer pump/motor unit.

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The arduous wired circuits and elements of the headlamp washer system could also be recognized utilizing typical diagnostic instruments and procedures. Refer to the suitable wiring data. However, typical diagnostic strategies is not going to show conclusive within the analysis of the headlamp washer system or the digital controls or communication between different modules and gadgets that present some options of the headlamp washer system. The most dependable, environment friendly, and correct means to diagnose the headlamp washer system or the digital controls and communication associated to headlamp washer system operation requires the usage of a diagnostic scan software.

The headlamp washer system consists of the next main elements:

  • Headlamp Washer Nozzle – A telescopic headlamp washer nozzle is secured to the entrance fascia beneath every entrance lamp unit.
  • Headlamp Washer Pump/Motor – The electrical headlamp washer pump/motor unit is situated in a devoted gap on the decrease, outboard aspect of the washer reservoir, forward of the left entrance wheel home splash protect. This excessive stress pump is situated above and rearward of the reversible entrance and rear washer pump/motor unit on the reservoir.
  • Headlamp Washer Plumbing – The plumbing for the headlamp washer system consists of huge diameter rubber hoses and molded plastic fittings. The plumbing is routed to the washer nozzles on the entrance fascia from the washer reservoir. The connections on the headlamp washer pump and the 2 headlamp washer nozzles function distinctive quick-connect fittings.
  • Headlamp Washer Relay – The headlamp washer relay is an International Standards Organization (ISO) relay that’s situated inside the Power Distribution Center (PDC) in the best entrance nook of the engine compartment.
  • Multi-Function Switch – The multi-function swap is integral to the Steering Column Control Module (SCCM) together with the clockspring and the Steering Control Module (SCM) on the highest of the steering column just under the steering wheel. The multi-function swap is linked to the SCM. Only the swap management stalk extending from the left aspect of the steering column is seen, whereas the rest of the swap is hid beneath the steering column shrouds. The multi-function swap offers all the driver controls for each the entrance and rear wiper and washer methods. Steering Control Module – The Steering Control Module (SCM) is integral to the Steering Column Control Module (SCCM) together with the multi-function swap and the clockspring on the highest of the steering column just under the steering wheel. The SCM is totally hid beneath the steering column shrouds.
  • Totally Integrated Power Module – The Totally Integrated Power Module (TIPM) is situated in the best entrance nook of the engine compartment.
  • Washer Reservoir – A novel washer reservoir is used on autos with the non-obligatory headlamp washer system, which has devoted provisions for the headlamp washer pump and plumbing. This reservoir is mounted in the identical location and utilizing the identical mounting {hardware} as is used for autos with out the headlamp washers. The reservoir is hid between the left inside fender protect and the left outer fender panel, forward of the left entrance wheel home splash protect. The filler neck and cap are the one seen elements of the reservoir and, are accessed from the left entrance nook of the engine compartment.
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Hard wired circuitry connects the headlamp washer system elements to {the electrical} system of the automobile. These arduous wired circuits are integral to a number of wire harnesses, that are routed all through the automobile and retained by many various strategies. These circuits could also be linked to one another, to the automobile electrical system and to the headlamp washer system elements via the usage of a mix of soldered splices, splice block connectors, and lots of several types of wire harness terminal connectors and insulators. Refer to the suitable wiring data. The wiring data consists of wiring diagrams, correct wire and connector restore procedures, additional particulars on wire harness routing and retention, in addition to pin out and placement views for the varied wire harness connectors, splices and grounds.

Plumbing

The headlamp washer system plumbing consists of a big diameter excessive stress rubber hose that’s routed from the outlet nipple of the headlamp washer pump/motor unit on the washer reservoir to at least one barbed nipple of an elbow becoming close to the entrance higher outboard nook of the reservoir. One finish of a hose from the entrance fascia connects to the opposite barbed nipple of the elbow becoming on the reservoir, whereas the opposite finish connects to the barbed nipple of a tee becoming situated close to the left body rail on the left aspect of the entrance fascia. The different two barbed nipples of the tee becoming are linked to 2 brief lengths of hose that every terminate at a telescopic headlamp washer nozzle behind the fascia and beneath the 2 entrance lamp models. The hose connections on the nozzles, on the washer pump and on the washer reservoir elbow are secured utilizing molded plastic quick-connect fittings.

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Washer hose or tube is accessible for service solely as roll inventory, which should then be minimize to size. The molded plastic washer hose fittings can’t be repaired. If these fittings are ineffective or broken, they should be changed.

Washer pump / motor

 

Headlamp washer pump / motor
The headlamp washer pump/motor unit (1) of autos so geared up is situated on the highest of a sump space simply above and ahead of the reversible entrance and rear washer pump on the outboard aspect of the washer reservoir, between the left entrance fender and inside fender protect forward of the left entrance wheel home splash protect. A small completely lubricated and sealed electrical motor is coupled to the rotortype washer pump.

An inlet nipple (4) on the underside of the pump housing (3) passes via a rubber grommet seal/filter display put in in a devoted mounting gap of the washer reservoir. When the pump is put in within the reservoir the short join outlet nipple (5) on the pump housing factors towards the left aspect of the automobile and connects the unit to the headlamp washer plumbing.

The headlamp washer pump/motor unit is retained on the reservoir by the interference match between the pump inlet nipple and the grommet seal, which is a light-weight press match. The high of the washer pump can also be secured to the washer reservoir by a light-weight snap match right into a receptacle molded into the reservoir that enables for mounting of the washer pump with out the usage of fasteners. An integral connector receptacle (2) on the highest of the motor housing connects the unit to the automobile electrical system via a devoted take out and connector of the Front End Module (FEM) wire harness.

The headlamp washer pump/motor unit can’t be repaired. If ineffective or broken, the complete headlamp washer pump/ motor unit should be changed. The rubber grommet seal/filter display is accessible for separate service alternative.

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