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                                                                                                        DI-603
                                            DIAGNOSTICS   -   CRUISE CONTROL SYSTEM
                                                                                                         DI091-25




 Diagnosis Circuit

CIRCUIT DESCRIPTION
This circuit sends a signal to the ECU that DTC output is required.

WIRING DIAGRAM




                                                                                         Cruise Control ECU


                           DLC1
                                                     18                                5
             BR                             P                            P-B
                      E1          Tc                 IH2                              C15 Tc
                  3                    11


         A
              J14
              J/C
         A
        BR

      EC




                                                                                                           I19494




2001 SIENNA (RM787U)

                                                                   Author :            Date :            757
DI-604
                                    DIAGNOSTICS   -   CRUISE CONTROL SYSTEM

INSPECTION PROCEDURE

   1     Check voltage between terminals Tc and E1 of DLC2.

                                          PREPARATION:
                       E1
                                          Turn ignition switch ON.
                                          CHECK:
                                          Measure voltage between terminals Tc and E1 of DLC2.
                                          OK:
                                                Voltage: 10 - 14 V

                            Tc
                                 N15970




                                            OK        Proceed to next circuit inspection shown on
                                                      problem symptom table (See page DI-572 ).


  NG



   2     Check harness and connector between cruise control ECU and DLC2, DLC2 and
         body ground (See page IN-31 ).


                                            NG        Repair or replace harness or connector.


  OK



  Check and replace cruise control ECU (See
  page IN-31 ).




2001 SIENNA (RM787U)

                                                            Author :           Date :            758



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