System Overview

Fig 1: Identifying Headlamp Washer System

Courtesy of VOLVO CARS CORPORATION

1. Windshield washer reservoir
2. Pump
3. Relay
4. Central electronic module (CEM)
5. Steering wheel module (SWM)
6. Telescopic arm
7. Washer nozzle
8. Cover.

Pump 

An electrical centrifugal pump increases the pressure of the fluid in the system. The windshield washer fluid presses the pistons out and then flows out through the nozzles and cleans the headlamps.

• The pump is on the windshield washer reservoir at the pumps for the front and rear windshields
• The motor is activated for 1 second for each wash
• Maximum pump pressure = 4 bar
• Output: 180 W.

Washing 

Approximately 1 dl of washer fluid is used for each wash.

The capacity of the windshield washer reservoir is 6.5 liters.