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                                                                                                        DI-431
                                      DIAGNOSTICS   -   THEFT DETERRENT SYSTEM
                                                                                                         DI023-15




 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.
The ECU operates the key confinement prevention function while the key unlock warning switch is ON.

WIRING DIAGRAM


                                                                                      Theft Deterrent
                                                                                      ECU
                 U1
                 Unlock Warning         Instrument Panel J/B
                 Switch
                                         19              13                      6
                                  Y                                   Y
                                         1P              1L                      T5 KSW
                1          2

    W-B
                                         16               2
                                         1P              1O
                                                                      W-B


                                                                    ID




                                                                                                           I13718




2002 ECHO (RM884U)

                                                               Author :              Date :              601
DI-432
                                         DIAGNOSTICS     -   THEFT DETERRENT SYSTEM

INSPECTION PROCEDURE

   1            Check key unlock warning switch.

                                               PREPARATION:
                                               Disconnect the key unlock warning switch connector.
                               2
                                               CHECK:
                                               Check continuity between terminal 1 and 2 of key unlock warn-
                                               ing switch connector, when the key is inserted into the key cylin-
                                               der or removed.
                                               OK:
          (-)        (+)
 SR4924
                                       1            Switch position          Tester connection            Specified condition
 N14675                               I00634
                                                   ON (Key inserted)               1-2                        Continuity
                                                  OFF (Key removed)                 -                       No continuity


                                                 NG          Replace key unlock warning switch.


   OK




   2            Check harness and connectors between ECU and key unlock warning switch,
                key unlock warning switch and body ground (See page IN-29 ).


                                                 NG          Repair or replace harness or connector.


   OK



  Proceed to next circuit inspection shown in
  problem symptoms table
  (See page DI-412 ).




2002 ECHO (RM884U)

                                                                       Author :                  Date :                     602



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