Wiper and Washer Systems: Description and Operation: Overview

Wipers and Washers

OVERVIEW
Windshield wiper and washer operation is controlled by the CJB (central junction box) in response to driver input and if fitted, signals from the rain sensor. The front wipers have 4 operational states:
- Flick wipe
- Intermittent/Auto (vehicles without/with rain sensor fitted)
- Slow wipe
- Fast wipe.
The 'Auto' function requires an input from the rain sensor. The rain 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 (central junction box) over the LIN (local interconnect network) bus.
The CJB (central junction box) also controls operation of the headlamp wash function. For additional information, refer to Wipers and Washers Description
The rear screen wiper system operates independently of the windshield wiper system and is controlled by the CJB (central junction box) on receipt of LIN (local interconnect network) bus messages from the RH (right-hand) steering column multi-function switch.

NOTE:
The windshield and rear screen washers utilize the same pump meaning only 1 wash function, either front or rear, can be performed at any one time.