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                                                                                                            DI-533
                                                  DIAGNOSTICS   -   BODY CONTROL SYSTEM
                                                                                                                 DI574-03




 Door Unlock Detection Switch Circuit

CIRCUIT DESCRIPTION
The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door
lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the
door lock knob conditions is this circuit. It is used as one of the operating conditions for the key confinement
prevention function, wireless door lock control system and theft deterrent system.

WIRING DIAGRAM
                                                                                                      Body ECU
                                               D26 Rear LH Door Unlock
                                                   Detection Switch
                                    3                                        7                    8
                  W-B                          W-B                  LG              LG     LG
                                    BW1                                     BW1                  B17 LSWR
                                                     1           4

                                               D27 Rear RH Door Unlock
                                                   Detection Switch
                                     3                                        7
                  W-B               BX1
                                               W-B                  LG       BX1
                                                                                    LG
                                                     1           4
     W-B                                               D24 Driver Door Unlock
                                                           Detection Switch
                  Center                          1                                  12          17
     13 3E                     W-B                     W-B                  R-L            R-L
                  J/B                            IF2                                 IF2         B16 LSWD
                                                             1           4
                                                       D25 Passenger Door Unlock
                                                           Detection Switch
                                                 6                               13              14
     16 3E                      W-B                    W-B                  L-Y            L-Y
                                                 IK1                             IK1             B16 LSWP
                                                            1            4
     W-B
                           A    A
            A
                J9                       J4
                J/C                      J/C
                                A

           IF                  IE

                                                                                                                   I10127




 2002 4RUNNER (RM887U)

                                                                         Author :            Date :              709
DI-534
                                   DIAGNOSTICS   -   BODY CONTROL SYSTEM

INSPECTION PROCEDURE

   1     Check door unlock detection switch (See page BE-76 ).


                                          NG         Replace door lock motor.


  OK



   2     Check harness and connector between door unlock detection switch and body
         ECU (See page IN-28 ).


                                          NG         Repair or replace harness or connector.


  OK



  Proceed to next circuit inspection shown on
  problem symptoms table (See page
  DI-517 ).




2002 4RUNNER (RM887U)

                                                           Author :             Date :         710

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