واﻟ واﻟ  ﻟﻠ  اﻟ  اﻟﻬ 
Saudi Standards, Metrology and Quality Org. (SAS O) 
 
      
 
 
 
 
 
Final Draft Standard  
 
 
 
 
SASO /FDS/31839/2020  
 
 
 
Road vehicles – Windshiel d wiping and washing syste ms 
 
 
 
    
ICS: 43.040.65 
 
This document is a draft Saudi Standard circulated for comments . It is, therefore, 
subject to alteration and modifi cation and may not be referred to as a Saudi 
Standard until approved by SASO . SASO S TANDAR D SASO/FDS 31839/2020
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Conte nts 
 
 
 
1- Scope and field of application .............................................................. ............................... 2 
 
2- Terms and definitions  .............................................................. ............................................ 2 
 
3- Technical requirements  ............................................................... ........................................ 3 
 
 
Bibliography  .............................................................. ............................................................... ... 5 SASO S TANDAR D SASO/FDS 31839/2020
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 Road vehicles – Windshield wiping and washing systems  
 
1- Scope and field and application 
This standard specifies the technical requirements for windshie ld wiping and washing systems. 
This standard applies to passenger cars, multipurpose passenger  vehicles, trucks, and buses. 
 
2- Terms and definitions 
For the purposes of this standard, the following terms and defi nitions are applied: 
2.1 Passenge r car 
A motor vehicle with motive power, designed for carrying 10 per sons or less including the 
driver and their luggage, except a low-speed vehicle, multipurp ose passenger vehicle, or trailer. 
2.2 Multipurpose passe nger vehicle 
A motor vehicle with motive power, designed to carry 10 persons  or less or goods equivalent 
by weight which is constructed either on a truck chassis or wit h special features for occasional 
off-road operation. Except a low-speed vehicle or trailer 
2.3 Truck 
A motor vehicle with motive power, designed primarily for the t ransportation of property, 
special purpose equipment, or towing a trailer except a trailer . 
2.4 Bus 
A motor vehicle with motive power, designed for carrying more t han 10 persons, except a 
trailer. 
2.5 Windscreen wiping Syste m 
Device for wiping the outer glazed surface of the Windscreen, t ogether with the necessary 
accessories and controls. 
2.6 Windscreen washing Syste m 
Device for storing washer Solution and applying it to the winds creen outer glazed surface, 
together with the necessary controls. 
2.7 Wiped area 
Area of the outer glazed surface that is cleared by the wiper b lade(s) when operating on a wet 
Windscreen. The parking travel, if it exists, is disregarded. 
2.8 Wet windscreen 
Windscreen which is uniformly wetted over its whole area at a s imulated rainfall rate of at least 
1 mm/min, calculated normal to the glazed surface. 
2.9 wiper cycle 
Movement of a wiper blade which is required to cover its wiping  travel and to return to its 
starting Point. The parking travel, if it exists, is disregarde d. 
2.10 Daylight opening 
The maximum unobstructed opening through the glazing surface. SASO S TANDAR D SASO/FDS 31839/2020
(1) Follow the standard SAE J903 until the adoption of the Saudi standard.
(2) Follow the standard SAE J198 until the adoption of the Saudi standard.
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 2.11 Glazing surface reference line 
The line resulting from the intersection of the glazing surface  and a horizontal plane 635 
millimeters above the seating reference point as shown in in St andard(1). 
2.12 Plan view reference line 
a) For vehicles with bench-type seats, a line parallel to the veh icle longitudinal centerline 
outboard of the steering wheel centerline 0.15 times the differ ence between one-half of the 
shoulder room dimension and the steering wheel centerline-to-ca r-centerline dimension as 
shown in Standard(1); or 
b) For vehicles with individual-type seats, either: 
i) A line parallel to the vehicle longitudinal centerline which p asses through the center of the 
driver's designated seating position; or 
ii) A line parallel to the vehicle longitudinal centerline located  so that the geometric center of 
the 95 percent eye range contour is positioned on the longitudi nal centerline of the driver's 
designated seating position. 
 
3- Technical requirements 
3.1 Windshield wiping syste m 
Each vehicle shall be provided with a power-driven windshield w iping system that meets the 
following requirements: 
3.1.1 Frequenc y 
3.1.1.1  Each windshield wiping system shall have at least two frequenc ies or speeds. 
3.1.1.2  One frequency or speed shall be at least 45 cycles per minute regardless of engine load 
and engine speed. 
3.1.1.3  The lower frequency or speed shall be at least 20 cycles per m inute regardless of engine 
speed and engine load. 
3.1.1.4  The highest and one lower frequency or speed shall differ by a t least 15 cycles per 
minute. 
3.1.2 Wiped area 
3.1.2.1  Each windshield wiping system for passenger cars, light trucks , and multipurpose 
passenger vehicles with GVW of 4500 kg or less shall wipe the p ercentage of areas A, B, and 
C of the windshield that 1) is specified in column 2 of the tables (1) to (4) as applicabl e.; and 
2) is within the area bounded by a perimeter line on the glazing surface 25 millimeters from the 
edge of the daylight opening. 
3.1.2.2  Areas A, B, and C shall be established as shown in figures (1)  and (2) of Standard
(1); 
using the angles specified in Columns 3 through 6 of Tables (1)  to (4), as applicable. 
3.1.2.3  Each windshield wiping system for multipurpose passenger vehic les, trucks, and buses 
with GVW of 4500 kg or greater shall meet the performance requi rements in accordance with 
the test procedures specified in Standard(2). SASO S TANDAR D SASO/FDS 31839/2020
(3) Follow the standard SAE J942 until the adoption of the Saudi standard. 
(4) Follow the standard SAE J1944 until the adoption of the Saudi standard.
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 3.2 Windshield washing syste m 
3.2.1  Each vehicle shall be provided with a windshield washing syste m. 
3.2.2  Each windshield washing system for passenger cars, light truck s, and multipurpose 
passenger vehicles with GVW of 4500 kg or less shall meet the p erformance requirements in 
accordance with the test procedures specified in Standard(3), with the areas established in 
accordance with item 3.1.2.2. 
3.2.3  Each windshield washing system for multipurpose passenger vehi cles, trucks, and buses 
with GVW of 4500 kg or greater shall meet the performance requi rements in accordance with 
the test procedures specified in Standard(4). 
Note: 
(1) For passenger car windshield washing system shall follow the areas specified A, B, and C in Tables 1 to 4. 
(2) For multipurpose passenger vehicles, trucks, and buses windshield washing system shall follow the pattern 
designed by the manu facturer for the windshield wiping system on the exterior surface of the windshield glazing. 
 
Area Minimum  percent 
to be wiped Angles in degrees 
Left Right Up Down 
A 80 16 49 7 5 
B 94 13 46 4 3 
C 99 7 15 3 1 
Table (1) - Passenger cars of less than 1520 Millimeters in overall width 
 
Area Minimum  percent 
to be wiped Angles in degrees 
Left Right Up Down 
A 80 17 51 8 5 
B 94 13 49 4 3 
C 99 7 15 3 1 
Table (2) - Passenger cars of 1520 or more but less than 1630 Millimeters in overall width 
 
Area Minimum  percent 
to be wiped Angles in degrees 
Left Right Up Down 
A 80 17 53 9 5 
B 94 14 51 5 3 
C 99 8 15 4 1 
Table (3) - Passenger cars of 1630 or more but less than 1730 Millimeters in overall width 
 
Area Minimum  percent 
to be wiped Angles in degrees 
Left Right Up Down 
A 80 18 56 10 5 
B 94 14 53 5 3 
C 99 10 15 5 1 
Table (4) - Passenger cars of 1730 or more Millimeters in overall width SASO S TANDAR D SASO/FDS 31839/2020
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Bibliography  
 
- The main reference: 
[1] 49 Subtitle B-Chapter V-Part 571-Subpart B Section 104 
(FMVSS 571.104)  “Windshield wiping and washing systems”. 
 
- Other References: 
[1] ISO 9619:1992 “Passenger cars -- Windscreen wiping systems -- Test method”. 
 
 
[2] ISO 3469:1989 “Passenger cars -- Windscreen washing systems  -- Test methods”.