Document:

<PAGE>
                                                                     EXHIBIT 4.6

                     Nissan Auto Receivables Corporation II
                              990 West 190th Street
                           Torrance, California 90502

                                                      Dated as of April 17, 2002

                           YIELD SUPPLEMENT AGREEMENT

Wells Fargo Bank Minnesota, National Association
Wells Fargo Center
Sixth and Marquette Avenue
MAC N9311-161
Minneapolis, MN 55479
Attn:  Asset Backed Securities Department

Nissan Auto Receivables 2002-B Owner Trust
In care of:  Wilmington Trust Company
Rodney Square North
1100 North Market Street
Wilmington, DE 19890
Attn:  Nissan Auto Receivables 2002-B Owner Trust

Ladies and Gentlemen:

            Nissan Auto Receivables Corporation II (the "Company") hereby
confirms arrangements made as of the date hereof with you, Wells Fargo Bank
Minnesota, National Association, as Indenture Trustee, and Wilmington Trust
Company, as Owner Trustee for the Nissan Auto Receivables 2002-B Owner Trust
(the "Trust"), for the benefit of the Noteholders, to be effective upon (i)
receipt by the Company of the enclosed copy of this letter agreement (the "Yield
Supplement Agreement"), executed by the Indenture Trustee and the Owner Trustee,
(ii) execution of the Purchase Agreement, dated as of the date hereof (the
"Purchase Agreement"), between the Company and Nissan Motor Acceptance
Corporation ("NMAC"), (iii) receipt by NMAC of the payment by the Company of the
purchase price under the Purchase Agreement, and (iv) the receipt by the Company
of the capital contribution of NMAC in connection with the payment of the
purchase price under the Purchase Agreement. Capitalized terms used herein and
not otherwise defined herein shall have the respective meanings given to them in
the Sale and Servicing Agreement, dated as of the date hereof, among NMAC, as
Servicer, the Company, and Nissan Auto Receivables 2002-B Owner Trust, as Issuer
(the "Sale and Servicing Agreement").

      1. On or prior to each Determination Date, the Servicer shall notify the
Company and the Owner Trustee of the "Yield Supplement Deposit" (as defined
below) for the related Distribution Date, the amount on deposit in the Yield
Supplement Account (as defined below), the Servicing Payment Deposit with
respect to the related Distribution Date and the amount of reinvestment income
during the related Collection Period on the Yield Supplement Account.

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The "Yield Supplement Deposit" means, with respect to any Distribution Date, the
amount by which (i) the aggregate amount of interest that would have been due
during the related Collection Period on all Yield Supplemented Receivables (as
defined below) if such Yield Supplemented Receivables bore interest at the
Required Rate (as defined below) exceeds (ii) the amount of interest accrued on
such Yield Supplemented Receivables at their respective APRs and due during such
Collection Period. "Required Rate" means, with respect to each Collection
Period, the sum of (i) the Servicing Rate plus (ii) the Class A-4 Interest Rate.
"Yield Supplemented Receivable" means any Receivable that has an APR less than
the Required Rate.

      2. On or before the date hereof, the Owner Trustee shall establish and
maintain with the Securities Intermediary and pledge to the Indenture Trustee a
segregated trust account in the name of the Indenture Trustee for the benefit of
the Noteholders (the "Yield Supplement Account") in accordance with the
Securities Account Control Agreement to secure the payment of interest on the
Notes, or such other account as may be acceptable to the Rating Agencies, and
the Trust hereby grants to the Indenture Trustee for the benefit of the
Noteholders a first priority security interest in the Yield Supplement Account
and the monies on deposit and the other property that from time to time comprise
the Yield Supplement Account (including the Initial Yield Supplement Amount),
and any and all proceeds thereof (collectively, the "Yield Supplement Account
Property"). The Indenture Trustee shall possess all of the rights of a secured
party under the UCC with respect thereto. The Yield Supplement Account Property
and the Yield Supplement Account shall be under the sole dominion and control of
the Indenture Trustee. Neither the Company, the Trust nor any Person claiming
by, through or under the Company or the Trust shall have any right, title or
interest in, any control over the use of, or any right to withdraw from amounts
from, the Yield Supplement Account Property or the Yield Supplement Account. All
Yield Supplement Account Property in the Yield Supplement Account shall be
applied by the Relevant Trustee as specified in this Yield Supplement Agreement
and the Sale and Servicing Agreement. The Relevant Trustee shall, not later than
5:00 P.M., New York City time on the Business Day preceding each Distribution
Date, withdraw from the Yield Supplement Account and deposit in the Collection
Account an amount equal to the Yield Supplement Deposit plus the amount of
reinvestment income on the Yield Supplement Account for such Distribution Date.

      3. On or prior to the date hereof, the Company shall make a capital
contribution to the Trust of $33,088,311.47 (the "Initial Yield Supplement
Amount"), by depositing such amount into the Yield Supplement Account. The
amount required to be on deposit in the Yield Supplement Account on the date of
issuance of the Notes and for each Distribution Date until the Notes of all
Classes have been paid in full or the Indenture is otherwise terminated (the
"Required Yield Supplement Amount"), as determined by the Servicer and notified
to the Relevant Trustee, means an amount equal to the lesser of (i) the
aggregate amount of each Yield Supplement Deposit that will become due on each
future Distribution Date, assuming that payments on the Receivables are made on
their scheduled due dates, no Receivable becomes a prepaid Receivable and a
discount rate of 1.25%, and (ii) the Initial Yield Supplement Amount. The
Required Yield Supplement Amount may decline as a result of prepayments or
repayments in full of the Receivables. The Relevant Trustee shall have no duty
or liability to determine the Required Yield Supplement Amount and may fully
rely on the determination thereof by the Servicer. If, on any Distribution Date,
the funds in the Yield Supplement Account are in excess of the Required Yield
Supplement Amount for such Distribution Date after giving effect to all

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<PAGE>

distributions to be made on such Distribution Date, the Relevant Trustee shall
deposit the amount of such excess into the Collection Account for distribution
by the Relevant Trustee in accordance with the terms of Section 5.06(c) of the
Sale and Servicing Agreement. The Yield Supplement Account shall be part of the
Trust. It is the intent of the parties that the Yield Supplement Account
Property be treated as property of the Trust for all federal, state and local
income and franchise tax purposes. The provisions of this Yield Supplement
Agreement should be interpreted accordingly. Further, the Trust shall include in
its gross income all income earned on the Yield Supplement Account Property and
the Yield Supplement Account.

      4. All or a portion of the Yield Supplement Account may be invested and
reinvested in the manner specified in Section 5.08 of the Sale and Servicing
Agreement in accordance with written instructions from the Servicer. All such
investments shall be made in the name of the Relevant Trustee. Earnings on
investment of funds in the Yield Supplement Account shall be deposited in the
Collection Account on each Distribution Date, and losses and any investment
expenses shall be charged against the funds on deposit therein. Upon payment in
full of the Notes under the Indenture, as directed in writing by the Servicer,
the Indenture Trustee will release any amounts remaining on deposit in the Yield
Supplement Account to the Owner Trustee for the benefit of the
Certificateholders, which amounts the Owner Trustee shall deposit into the Trust
Collection Account, and the Company shall have no further obligation to pay to
the Servicer the Servicing Payment Deposit. If for any reason the Yield
Supplement Account is no longer an Eligible Deposit Account, the Relevant
Trustee shall promptly cause the Yield Supplement Account to be moved to another
institution or otherwise changed so that the Yield Supplement Account becomes an
Eligible Deposit Account.

      5. Our agreements set forth in this Yield Supplement Agreement are our
primary obligations and such obligations are irrevocable, absolute and
unconditional, shall not be subject to any counterclaim, setoff or defense
(other than full and strict compliance by us with our obligations hereunder) and
shall remain in full force and effect without regard to, and shall not be
released, discharged or in any way affected by, any circumstances or condition
whatsoever.

      6. This Yield Supplement Agreement shall not be amended, modified or
terminated except in accordance with the provisions for amendments,
modifications and terminations of the Sale and Servicing Agreement as set forth
in Section 10.01 of the Sale and Servicing Agreement.

      7. THIS YIELD SUPPLEMENT AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN
ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK, without reference
to its conflict of law provisions (other than Section 5-1401 of the General
Obligations Law of the State of New York), AND THE OBLIGATIONS, RIGHTS AND
REMEDIES OF THE PARTIES UNDER THIS AGREEMENT SHALL BE DETERMINED IN ACCORDANCE
WITH SUCH LAWS.

      8. Except as otherwise provided herein, all notices pursuant to this Yield
Supplement Agreement shall be in writing, personally delivered, sent by
telecopier, sent by courier or mailed by certified mail, return receipt
requested, and shall be effective upon receipt thereof. All notices shall be
directed as set forth below, or to such other address or telecopy

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<PAGE>

number or to the attention of such other person as the relevant party shall have
designated for such purpose in a written notice.

            The Company:

            Nissan Auto Receivables Corporation II
            990 West 190th Street
            Torrance, California  90502
            Attention:  Treasurer
            Facsimile No.: 310-324-2542

            Indenture Trustee:

            Wells Fargo Bank Minnesota, National Association
            Wells Fargo Center
            Sixth and Marquette Avenue
            MAC N9311 - 161
            Minneapolis, MN 55479
            Attn:  Asset Backed Securities Department
            Facsimile No.: 612-667-3464

            Trust:

            Nissan Auto Receivables 2002-B Owner Trust
            In care of:  Wilmington Trust Company
            Rodney Square North
            1100 North Market Street
            Wilmington, DE 19890
            Attn:  Nissan Auto Receivables 2002-B Owner Trust

            9. This Yield Supplement Agreement may be executed in one or more
counterparts and by the different parties hereto on separate counterparts, all
of which shall be deemed to be one and the same document.

            If the foregoing satisfactorily sets forth the terms and conditions
of our agreement, please indicate your acceptance thereof by signing in the
space provided below and returning to us the enclosed duplicate original of this
letter.

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                                        Very truly yours,

                                        NISSAN AUTO RECEIVABLES CORPORATION II

                                        By:    /s/ Joji Tagawa
                                            ------------------------------------
                                            Name:  Joji Tagawa
                                            Title: Treasurer

Agreed and accepted as of April 17, 2002

NISSAN MOTOR ACCEPTANCE CORPORATION

By:    /s/ Katsumi Ishii
    ------------------------------------
    Name:  Katsumi Ishii
    Title: President

WELLS FARGO BANK MINNESOTA, NATIONAL
  ASSOCIATION, AS INDENTURE TRUSTEE

By:    /s/ Cheryl Zimmerman
    ------------------------------------
    Name:  Cheryl Zimmerman
    Title: Corporate Trust Officer

NISSAN AUTO RECEIVABLES 2002-B
  OWNER TRUST

By:  WILMINGTON TRUST COMPANY,
not in its individual capacity but
solely as Owner Trustee on behalf of
the Trust

By:    /s/ Daniel M. Reser
    ------------------------------------

                                      S-1<PAGE>
Exhibit 4.3(f)
LANVISION SYSTEMS, INC.

FIFTH AMMENDMENT TO THE LOAN AND SECURITY AGREEMENT BETWEEN THE HILLSTREET FUND
L.P. AND LANVISION SYSTEMS, INC.

                        FIFTH AMENDMENT TO LOAN AGREEMENT

         THIS FIFTH AMENDMENT TO LOAN AGREEMENT ("Amendment") is executed
pursuant to and made a part of the Loan and Security Agreement dated July 17,
1998, by and between LANVISION SYSTEMS, INC., a Delaware corporation
("Borrower"), and THE HILLSTREET FUND, L.P., a Delaware limited partnership
("Lender"), as amended by letter agreements dated March 18, 1999, April 12,
1999, September 14, 1999 and Amendment Number 1, dated November 25, 1998, an
Amendment dated February 11, 2000, Amendment Number 3, dated September 5, 2000
and Amendment Number 4, dated April 2, 2001( as amended, the "Loan Agreement").

         WHEREAS, Borrower and Lender wish to further amend the Loan Agreement
in accordance with the terms and provisions hereof.

         NOW, THEREFORE, the parties agree as follows:

        1.  AMENDMENTS TO LOAN AGREEMENT. The following amendments shall be made
            to the terms of the Loan Agreement:

            (a) MINIMUM REVENUES AND EBIT. Section 6.4 of the Loan Agreement
                shall be amended in its entirety to read as follows:

                "Section 6.4 MINIMUM REVENUES AND EBIT.

                    (a) MINIMUM REVENUES. On each of the Computation Dates set
                        forth below, the Borrower shall not permit the total
                        cumulative revenues (calculated for the period of time
                        beginning on February 1, 2002 through such Computation
                        Date) to be less than the minimum amount set forth
                        bellow:

<PAGE>

<TABLE>
<CAPTION>
                                              1.                  MINIMUM
                      COMPUTATION DATE                      CUMULATIVE REVENUES
                      ----------------                      -------------------

<S>                                                             <C>
                      April 30, 2002                             $2,000,000

                      July 31, 2002                              $4,800,000

                      October 31, 2002                           $8,000,000

                      January 31, 2003                          $11,500,000
</TABLE>

                    (b) MINIMUM EBIT. On each Computation date set forth below,
                        the Borrower shall not permit the total Cumulative EBIT
                        (calculated for the period of time beginning on February
                        1, 2002 through such Computation Date) to be less than
                        the minimum amount set forth below:

2.              MINIMUM

<TABLE>
<CAPTION>
                      COMPUTATION DATE                          CUMULATIVE EBIT
                      ----------------                          ---------------

<S>                   <C>                                        <C>
                      April 30, 2002                             $ (200,000)

                      July 31, 2002                                $300,000

                      October 31, 2002                           $1,300,000

                      January 31, 2003                           $2,300,000
</TABLE>

                    (c) NET WORTH. Section 6.5 of the Loan Agreement shall be
                        amended in its entirety to read as follows:

                      "Section 6.5 NET WORTH. "On each of the Computation Dates
                      set forth below, the Borrower shall not permit the Net
                      Worth to be less than the minimum amount set forth below:

<PAGE>

                                                           3.     MINIMUM
                      COMPUTATION DATE                           NET WORTH
                      ----------------                           ---------

                      April 30, 2002                             $2,000,000

                      July 31, 2002                              $2,500,000

                      October 31, 2002                           $3,000,000

                      January 31, 2003                           $3,500,000

     Borrower and Lender shall amend this Agreement on or before February 28,
     2003, to provide covenant compliance (at minimum levels acceptable to
     Lender) under Section 6.4(a), 6.4 (b) and 6.5 for April 30, 2003, and each
     Computation date thereafter. If Borrower and Lender do not agree to
     amendments to such sections, the Borrower shall be deemed to be in default
     under the terms of these sections."

3.1      Section 6.7 of the Loan Agreement shall be amended in its entirety to
         read as follows:

                  "Section 6.7 MINIMUM CASH AND INVESTMENTS. The Borrower shall
                  at all times, after the payment of the Additional Special
                  Payment in accordance with Section 2.12 as amended below,
                  maintain on its balance sheet total cash and investments (as
                  described in Section 6.10(b)) of at least Four Million Eight
                  Hundred Thousand and 00/100 Dollars ($4,800,000.00)."

            (b)   Section 2 of the Loan Agreement shall be amended to add the
                  following:

                  "Section 2.12 ADDITIONAL SPECIAL PAYMENT. Borrower has accrued
                  on its balance sheet at January 31, 2002 the sum of Two
                  Million Two Hundred Thirty-nine Thousand, Seven Hundred
                  Ninety-eight and 00/100 Dollars ($2,239,798.00) (after giving
                  effect to two Special Payments made by Borrower pursuant to
                  the Third and Fourth Amendments to the Loan Agreement) as a
                  liability to Lender, representing the amount of the additional
                  fee accrued through January 31, 2002 to guarantee Lender a
                  minimum compounded annual internal rate of return of
                  twenty-five percent (25%) at maturity on July 31, 2004
                  pursuant to Section 2.3(c) of the Loan Agreement (the "Yield
                  Guarantee at Maturity"). Borrower has agreed to pay to Lender
                  the sum of Five Hundred Thousand and 00/100 Dollars

<PAGE>

                  ($500,000.00) of such accrued amount contemporaneously with
                  the execution of this Fifth Amendment, March 13, 2002 (the
                  "Special Payment Three"). Accordingly, upon payment in full of
                  the Term Loan, Lender agrees to credit against the amount of
                  the Yield Guarantee at Maturity due Lender an amount equal to
                  the future value of Five Hundred Thousand and 00/100 Dollars
                  ($500,000.00), compounded at an assumed interest rate of six
                  percent (6%) per annum from the date hereof to the date of
                  payment of the Term Loan. The amount so computed is referred
                  to as the "Future Credit Amount." For example, if the Loan is
                  paid in full at maturity on July 31, 2004, the Future Credit
                  Amount shall be equal to Five Hundred Seventy-two Thousand and
                  34/100 Dollars ($572,000.34). Notwithstanding this Special
                  Payment Three of Five Hundred Thousand and 00/100 Dollars
                  ($500,000.00), Borrower shall be liable to Lender for the full
                  amount of the Yield Guarantee at Maturity as if this Special
                  Payment Three had not been made, and will continue to accrue
                  an amount to satisfy such Yield Guarantee at Maturity on a
                  monthly basis as if this Special Payment Three had not been
                  made."

            2.    REAFFIRMATION OF COVENANTS, REPRESENTATIONS AND WARRANTIES.
                  Borrower hereby agrees and covenants that all representations
                  and warranties in the Loan Agreement including, without
                  limitation, all of those representations and warranties set
                  forth in Article 4, are true and accurate as of the date
                  hereof. Borrower further reaffirms all covenants in the Loan
                  Agreement and reaffirms each of the covenants set forth in
                  Articles 5 & 6 thereof, as if fully set forth herein, except
                  to the extent modified by this agreement.

                      IN WITNESS WHEREOF, the parties hereto have executed this
                  Amendment to Loan Agreement as of the 13th day of March 2002.

                 LENDER:                                  BORROWER:

         THE HILLSTREET FUND, L.P.                  LANVISION SYSTEMS, INC.

         By :     HillStreet Capital, Inc.          By: /s/ J. BrianPatsy
                                                        -----------------------
         Its:     Investment Manager                    J. Brian Patsy
                                                        Chief Executive Officer

         By:  /s/ Christian L. Meininger
            -----------------------------
         Christian L. Meininger, President

         Date:     3/13/02                              Date:      3/13/02
              ----------------------                    -----------------

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