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DI-772
                                              DIAGNOSTICS    -       AIR CONDITIONING SYSTEM
                                                                                                                  DI8AG-01




 Blower Motor Circuit (Rear Cooling)

CIRCUIT DESCRIPTION
This is the power source for blower motor.

WIRING DIAGRAM




                                           B19                                                  A/C control assembly
                        B11
                                           Blower Resistor Transistor
                        Blower Motor                                             7                18
                 W-G                   L                               P-B               P-B
                                                     BLWC                        IE2             A25 BLWC
                        1        2           4                   2
                                                 B

         3 IE1                                                                   6                19
                                                                      L-Y                 L-Y
                                                                                 IE2             A25 VMC
                                                       VMC 3
               W-G


         2   IK2                                                     W-B
                                                       GND
                                                                 1

               W-G

                                                                            BM


         From Rear
         Rr CLR Relay




                                                                                                                    I21131




2001 SIENNA (RM787U)

                                                                             Author :           Date :              926
                                                                                               DI-773
                                  DIAGNOSTICS   -   AIR CONDITIONING SYSTEM

INSPECTION PROCEDURE

  1     Check voltage between terminal BLWC of A/C control assembly connector and
        body ground.

                                        PREPARATION:
            ON          BLWC
                                        Remove the A/C control assembly with connector still con-
                                        nected.
                                        CHECK:
                                        (a) Turn ignition switch to ON.
                                        (b) Operate blower motor.
                                        (c) Measure voltage between terminal BLWC of A/C control
            (+)   (-)                        assembly and body ground.
                               I21003   OK:
                                             Voltage: 1 



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