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                                                                                                            05-2047
                                       DIAGNOSTICS     -    DYNAMIC LASER CRUISE CONTROL SYSTEM               05BEP-02




DIAGNOSIS CIRCUIT

CIRCUIT DESCRIPTION
This circuit output the malfunction codes on the cruise main indicator light in the combination meter when
terminal TC and CG of DLC3 is connected.
WIRING DIAGRAM

         D1
         DLC3                                                                                         ECM
                                  Driver Side J/B                           J18
                                                                            J/C
                                14                   34                                         20
                       P-B                                    P-B                      P-B
                TC              1K                   1H                                         E4 TC
                     13                                                29         19



                                                 J20
                                                 J/C
                                W-B                                   W-B
                CG
                     4                      51         42



                                                                                       IG




                                                                                                                I34886




2005 SIENNA REPAIR MANUAL (RM1163U)

                                                                    Author :                 Date :           2230
05-2048
                                          DIAGNOSTICS   -   DYNAMIC LASER CRUISE CONTROL SYSTEM

INSPECTION PROCEDURE
      1      INSPECT DLC3

                                                (a)   Turn the ignition switch to ON.
                     TC
                                                (b)   Measure voltage between terminals TC and CG of DLC3.
                                                      Standard:
                                                      10 to 14 V




                    DLC3     CG
                                       C52361



                                                  OK        Go to step 3

      NG

      2      CHECK WIRE HARNESS AND CONNECTOR(DLC3 - BODY GROUND)

(a)       Check for an open circuit in harness and connector between terminal CG of DLC3 and body ground
          (See page 01-37 ).
                                                  NG        REPAIR OR REPLACE WIRE HARNESS OR
                                                            CONNECTOR

      OK

      3      CHECK WIRE HARNESS AND CONNECTOR(DLC3 - ECM)

(a)       Check for an open or short circuit in harness and connector between terminal TC of DLC3 and ECM
          (See page 01-37 ).
                                                  NG        REPAIR OR REPLACE WIRE HARNESS OR
                                                            CONNECTOR

      OK

  REPLACE ECM (See page 10-17 )




 2005 SIENNA REPAIR MANUAL (RM1163U)

                                                                   Author :           Date :         2231

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