<PAGE>
                                                                   Exhibit 10(d)

                        QUARTERLY SERVICER'S CERTIFICATE

                             CONSUMERS FUNDING LLC
                $468,592,000 SECURITIZATION BONDS, SERIES 2001-1

Pursuant to Section 3.05 of the Servicing Agreement dated as of November 8, 2001
(the "Consumers Servicing Agreement") between Consumers Energy Company, as
Servicer and Consumers Funding LLC, as Issuer, the Servicer does hereby certify
as follows:

Capitalized terms used in the Quarterly Servicer's Certificate (the "Quarterly
Certificate") have their respective meanings as set forth in the Agreement.
References herein to certain sections and subsections are references to the
respective sections of the Agreement.

             Billing Periods: July 2005, August 2005, September 2005
                         Payment Date: October 20, 2005

<TABLE>
<S>                                                              <C>
1. COLLECTIONS ALLOCABLE AND AGGREGATE AMOUNTS AVAILABLE FOR
      THE CURRENT PAYMENT DATE:
   i.      Remittances for the July 2005 Collection Period       $  4,244,973.00
   ii.     Remittances for the August 2005 Collection Period     $  5,012,478.00
   iii.    Remittances for the September 2005
              Collection Period                                  $  4,628,586.00
   iv.     Remittances for the Collection Period                 $          0.00
   v.      Remittances for the Collection Period                 $          0.00
   vi.     Remittances for the Collection Period                 $          0.00
   vii.    Remittances for the Collection Period                 $          0.00
   viii.   Net Earnings on Collection Account                    $     74,049.76
   ix.     Net Earnings on Capital Subaccount                    $     19,804.41
   x.      Net Earnings on Overcollateralization Subaccount      $      5,251.43
   xi.     Net Earnings on Reserve Subaccount                    $     12,943.81
                                                                 ---------------
           GENERAL SUBACCOUNT BALANCE                            $ 13,998,086.41
   xii.    Reserve Subaccount Balance                            $  1,454,602.10
   xiii.   Overcollateralization Subaccount Balance              $    627,578.57
   xiv.    Capital Subaccount Balance (less $100K)               $  2,242,960.00
   xv.     Capital Reserve Subaccount Balance                    $    100,000.00
                                                                 ---------------
   xvi.    COLLECTION ACCOUNT BALANCE                            $ 18,423,227.08

2. OUTSTANDING PRINCIPAL BALANCE AND COLLECTION ACCOUNT
      BALANCE AS OF PRIOR PAYMENT DATE:
   i.      Class A-1 Principal Balance                           $          0.00
   ii.     Class A-2 Principal Balance                           $ 18,957,770.71
   iii.    Class A-3 Principal Balance                           $ 31,000,000.00
   iv.     Class A-4 Principal Balance                           $ 95,000,000.00
   v.      Class A-5 Principal Balance                           $117,000,000.00
   vi.     Class A-6 Principal Balance                           $115,592,000.00
                                                                 ---------------
   VII.    SECURITIZATION BOND PRINCIPAL BALANCE                 $377,549,770.71
   viii.   Reserve Subaccount Balance                            $  1,454,602.10
   ix.     Overcollateralization Subaccount Balance              $    627,578.57
   x.      Capital Subaccount Balance                            $  2,242,960.00
   xi.     Capital Reserve Subaccount Balance                    $    100,000.00

3. REQUIRED FUNDING/PAYMENTS AS OF CURRENT PAYMENT DATE:
   i.      Projected Class A-1 Bond Balance                      $          0.00
   ii.     Projected Class A-2 Bond Balance                      $ 11,013,254.00
   iii.    Projected Class A-3 Bond Balance                      $ 31,000,000.00
   iv.     Projected Class A-4 Bond Balance                      $ 95,000,000.00
   v.      Projected Class A-5 Bond Balance                      $117,000,000.00
   vi.     Projected Class A-6 Bond Balance                      $115,592,000.00
                                                                 ---------------
   VII.    PROJECTED SECURITIZATION BOND BALANCE                 $369,605,254.00
   viii.   Required Class A-1 Coupon (2.59% per annum rate)      $          0.00
   ix.     Required Class A-2 Coupon (3.80% per annum rate)      $    180,098.82
</TABLE>


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<PAGE>
<TABLE>
<S>                                                              <C>
   x.      Required Class A-3 Coupon (4.55% per annum rate)      $    352,625.00
   xi.     Required Class A-4 Coupon (4.98% per annum rate)      $  1,182,750.00
   xii.    Required Class A-5 Coupon (5.43% per annum rate)      $  1,588,275.00
   xiii.   Required Class A-6 Coupon (5.76% per annum rate)      $  1,664,524.80
   xiv.    Required Overcollateralization Funding                $     36,587.14
   xv.     Required Capital Subaccount Funding                   $          0.00

4. ALLOCATION OF REMITTANCES AS OF CURRENT PAYMENT DATE
      PURSUANT TO 8.02 OF THE INDENTURE:
   i.      Bond Trustee Fees and Expenses                        $          0.00
   ii.     Servicing Fee                                         $    235,968.61
   iii.    Cumulative Monthly Administration Fee during
              Relevant Quarter                                   $     20,000.00
   iv.     Independent Managers Fee                              $      1,750.00
   v.      Operating Expenses (subject to cap of
              $100,000/quarter)                                  $     17,061.82

   VI.     QUARTERLY INTEREST                                    $  4,968,273.62
           1. Class A-1 Bond Coupon Payment                      $          0.00
           2. Class A-2 Bond Coupon Payment                      $    180,098.82
           3. Class A-3 Bond Coupon Payment                      $    352,625.00
           4. Class A-4 Bond Coupon Payment                      $  1,182,750.00
           5. Class A-5 Bond Coupon Payment                      $  1,588,275.00
           6. Class A-6 Bond Coupon Payment                      $  1,664,524.80
   vii.    Principal Due and Payable as a Result of Event of
              Default or on Final Maturity Date                  $          0.00

   VIII.   QUARTERLY PRINCIPAL                                   $  7,944,516.71
           1. Class A-1 Bond Principal Payment                   $          0.00
           2. Class A-2 Bond Principal Payment                   $  7,944,516.71
           3. Class A-3 Bond Principal Payment                   $          0.00
           4. Class A-4 Bond Principal Payment                   $          0.00
           5. Class A-5 Bond Principal Payment                   $          0.00
           6. Class A-6 Bond Principal Payment                   $          0.00
   ix.     Operating Expenses (in excess of $100,000)            $          0.00
   x.      Funding of Capital Subaccount (to required level)     $          0.00
   xi.     Funding of Overcollateralization Subaccount
              (to required level)                                $     36,587.14
   xii.    Net Earnings on Capital Subaccount Released
              to Issuer                                          $     19,804.41
   xiii.   Deposits to Reserve Subaccount                        $    754,124.10
   xiv.    Released to Issuer upon Series Retirement:
              Collection Account                                 $          0.00

5. OUTSTANDING PRINCIPAL BALANCE AND COLLECTION ACCOUNT
      BALANCE AS OF CURRENT PAYMENT DATE:
     (AFTER GIVING EFFECT TO PAYMENTS TO BE MADE ON SUCH
      PAYMENT DATE):
   i.      Class A-1 Principal Balance                           $          0.00
   ii.     Class A-2 Principal Balance                           $ 11,013,254.00
   iii.    Class A-3 Principal Balance                           $ 31,000,000.00
   iv.     Class A-4 Principal Balance                           $ 95,000,000.00
   v.      Class A-5 Principal Balance                           $117,000,000.00
   vi.     Class A-6 Principal Balance                           $115,592,000.00

   VII. SECURITIZATION BOND PRINCIPAL BALANCE                    $369,605,254.00
   viii.   Reserve Subaccount Balance                            $  2,221,670.01
   ix.     Overcollateralization Subaccount Balance              $    669,417.14
   x.      Capital Subaccount Balance                            $  2,242,960.00
   xi.     Capital Reserve Subaccount Balance                    $    100,000.00
</TABLE>


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<PAGE>
<TABLE>
<S>                                                              <C>
6. SUBACCOUNT DRAWS AS OF CURRENT PAYMENT DATE
      (IF APPLICABLE, PURSUANT TO SECTION 8.02 OF
      THE INDENTURE):
   i.      Reserve Subaccount                                    $          0.00
   ii.     Overcollateralization Subaccount                      $          0.00
   iii.    Capital Subaccount                                    $          0.00
   iv.     Capital Reserve Subaccount                            $          0.00
                                                                 ---------------
   V.      TOTAL DRAWS                                           $          0.00

7. SHORTFALLS IN INTEREST AND PRINCIPAL PAYMENTS AS OF CURRENT
      PAYMENT DATE:

   I.      QUARTERLY INTEREST                                    $          0.00
           1. Class A-1 Bond Coupon Payment                      $          0.00
           2. Class A-2 Bond Coupon Payment                      $          0.00
           3. Class A-3 Bond Coupon Payment                      $          0.00
           4. Class A-4 Bond Coupon Payment                      $          0.00
           5. Class A-5 Bond Coupon Payment                      $          0.00
           6. Class A-6 Bond Coupon Payment                      $          0.00

   II.     QUARTERLY PRINCIPAL                                   $          0.00
           1. Class A-1 Bond Principal Payment                   $          0.00
           2. Class A-2 Bond Principal Payment                   $          0.00
           3. Class A-3 Bond Principal Payment                   $          0.00
           4. Class A-4 Bond Principal Payment                   $          0.00
           5. Class A-5 Bond Principal Payment                   $          0.00
           6. Class A-6 Bond Principal Payment                   $          0.00

8. SHORTFALLS IN REQUIRED SUBACCOUNT LEVELS AS OF CURRENT
      PAYMENT DATE:
   i.      Overcollateralization Subaccount                      $          0.00
   ii.     Capital Subaccount                                    $          0.00
</TABLE>

IN WITNESS HEREOF, the undersigned has duly executed and delivered this
Quarterly Servicer's Certificate this 13th day of October, 2005.

Consumers Energy Company, as Servicer


by: /s/ Glenn P. Barba
    ---------------------------------
    Glenn P. Barba
    Vice President, Controller and
    Chief Accounting Officer


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