**Exhibit 31.2**

**CERTIFICATIONS**

 

 
| I,  Michael J. Mack, Jr., certify that: |
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| 1.                                      |   | I have reviewed this  quarterly report on Form 10-Q of John Deere Capital Corporation; |
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| 2.                                      |   | Based on my knowledge,  this report does not contain any untrue statement of a material fact or omit  to state a material fact necessary to make the statements made, in light of  the circumstances under which such statements were made, not misleading with  respect to the period covered by this report; |
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| 3.                                      |   | Based on my knowledge, the  financial statements, and other financial information included in this  report, fairly present in all material respects the financial condition,  results of operations and cash flows of the registrant as of, and for, the  periods presented in this report; |
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| 4.                                      |   | The registrant’s other  certifying officer(s) and I are responsible for establishing and maintaining  disclosure controls and procedures (as defined in Exchange Act Rules  13a-15(e) and 15d-15(e)) for the registrant and have: |
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|                                    |   | a) | Designed such disclosure controls and procedures, or caused such  disclosure controls and procedures to be designed under our supervision, to  ensure that material information relating to the registrant, including its  consolidated subsidiaries, is made known to us by others within those  entities, particularly during the period in which this report is being  prepared; |
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|                                    |   | b) | Evaluated the effectiveness of the registrant’s disclosure controls  and procedures and presented in this report our conclusions about the  effectiveness of the disclosure controls and procedures, as of the end of the  period covered by this report based on such evaluation; and |
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|                                    |   | c) | Disclosed in this report any change in the registrant’s internal  control over financial reporting that occurred during the registrant’s most  recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of  an annual report) that has materially affected, or is reasonably likely to  materially affect, the registrant’s internal control over financial  reporting; and |
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| 5.                                      |   | The registrant’s other certifying officer(s) and I have disclosed,  based on our most recent evaluation of internal control over financial  reporting, to the registrant’s auditors and the audit committee of the  registrant’s board of directors (or persons performing the equivalent  function): |
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|                                    |   | a) | All significant deficiencies and material weaknesses in the design or  operation of internal control over financial reporting which are reasonably  likely to adversely affect the registrant’s ability to record, process,  summarize and report financial information; and |
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|                                    |   | b) | Any fraud, whether or not material, that involves management or other  employees who have a significant role in the registrant’s internal control  over financial reporting. |
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| Date:                                   | February 24, 2006 |   | By: | */s/  M. J. Mack, Jr.* |
|                                    |   |   |   | Michael  J. Mack, Jr. |
|                                    |   |   |   | Principal  Financial Officer |
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