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                                                                                                     DI-527
                                         DIAGNOSTICS    -   BODY CONTROL SYSTEM
                                                                                                       DI571-05




 Key Unlock Warning Switch Circuit

CIRCUIT DESCRIPTION
The key unlock warning switch goes on when the ignition key is inserted in the key cylinder and goes off when
the ignition key is removed.

WIRING DIAGRAM


                                     U1                                              Body ECU
                                     Key Unlock                 J6
                                     Warning Switch             J/C               2
                               W-B                    Y-R                  Y-R
                                                                                 B16 KSW
                                     1         2            A         A




                          A
                              J4
                              J/C




                         IE




                                                                                                         I10134




 2002 4RUNNER (RM887U)

                                                                      Author :        Date :           703
DI-528
                                   DIAGNOSTICS   -   BODY CONTROL SYSTEM

INSPECTION PROCEDURE

   1     Check key unlock warning switch (See page BE-12 ).


                                          NG         Replace key unlock warning switch.


  OK



   2     Check harness and connector between key unlock warning 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 :           704



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