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(1) Assign to each number in the VIN its actual mathematical value and assign to each letter the value specified for it in Table III, as follows: 
Table III--Assigned Values
 
A = 1
B = 2
C = 3
D = 4
E = 5	F = 6
G = 7H = 8
J = 1
K = 2
L = 3	M = 4
N = 5P = 7
R = 9
S = 2
T = 3	U = 4
V = 5W = 6
X = 7
Y = 8
Z = 9	 
(2) Multiply the assigned value for each character in the VIN by the position weight factor specified in Table IV, as follows:
Table IV-- VIN Position and Weight Factor
 
VIN Position	1st	2nd	3rd	4th	5th	6th	7th	8th	   
Weight Factor	8	7	6	5	4	3	2	10	 
  
VIN Position	9th	10th	11th	12th	13th	14th	15th	16th	17th	   
Weight Factor	check
digit	9	8	7	6	5	4	3	2	 
(3) Add the resulting products and divide the total by 11.
(4) The numerical remainder is the check digit. If the remainder is 10 the letter ``X'' shall be used to designate the check digit. The correct numeric remainder, zero through nine (0-9) or the letter ``X,'' shall appear in VIN position nine (9).
(5) A sample check digit calculation is shown in Table V as follows:
Table V--Calculation of a Check Digit
VIN Position................................ 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Sample VIN.................................. 1 G 4 A H 5 9 H .. 5 G 1 1 8 3 4 1.
Assigned Value.............................. 1 7 4 1 8 5 9 8 .. 5 7 1 1 8 3 4 1.
Weight Factor............................... 8 7 6 5 4 3 2 10 0 9 8 7 6 5 4 3 2
Multiply Assigned value times weight factor. 8 49 24 5 32 15 18 80 0 45 56 7 6 40 12 12 2
Add products: 8+49+24+5+32+15+18+80+0+45+56+7+6+40+12+12+2 = 411
Divide by 11: 411/11 = 37 4/11
The remainder is 4; this is the check digit to be inserted in position nine (9) of the VIN
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