Description And Operation: Overview

Windshield wiper and washer operation is controlled by the Central Junction Box (CJB) in response to driver input and signals from the rain/light sensor. The windshield wipers will park automatically irrespective of their position, when the ignition or the wipers and washers control switch is selected off. Wiper functions are suspended during engine cranking to reduce battery power consumption under high load conditions. A timed washer jet function eliminates the trail of washer fluid left on the windshield after a wiping action and reduces fluid consumption by only operating the washer jets on the up stoke of the wiper arms. This function can be configured using Jaguar approved diagnostic equipment.

The wiper and washer system comprises:

• A windshield wiper motor and linkage assembly
• Two windshield wiper arms with washer jets
• Two windshield wiper blades
• Two headlamp washer jets
• The washer fluid reservoir, including:
  • The windshield washer pump
  • The headlamp washer pump
  • The washer fluid level sensor
• The wipers and washers control switch
• The rain/light sensor

The windshield wiper has five operational states:

• Flick wipe
• Auto mode
• Intermittent mode (if the Auto mode is disabled in the IC (Instrument Cluster) menu)
• Normal (slow) speed continuous
• Fast speed continuous.

The intermittent mode delay periods change with the road speed, with the delay decreasing as the road speed increases.

The 'Auto' function requires an input from the rain/light sensor. The rain/light sensor is mounted on the inner surface of the windshield and transmits an infra-red signal to determine the amount of water on the outer surface of the windshield. A value is then transmitted to the CJB over the Local Interconnect Network (LIN) bus.