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                                                       DIAGNOSTICS    -    THEFT DETERRENT SYSTEM

 Door Unlock Detection Switch Circuit

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 from this circuit. It is used as one of the operating conditions for the key confine-
ment prevention function.


                                                                                       J8                                  Theft Deterrent
                              L-R (*1)                                                 J/C                                 ECU
                                                          11                                                        14
                              L-B (*2)                                L-R        A              A       L-B
                                                          IA1                                                       T5      LSWD
                                                          11                                                        15
                                             L-R                                                    L-B
                                                          IF1                                                       T5      LSWP
                                                                              J4 J/C     GR                GR
                                                                 7                                  4               16
                                                                             A         A (*3)              (*3)
                                                                BA2                                 IB1                     LSWR
                                                       GR                 GR
                                                       (*3)               (*3) A GR
                D17 (*2)
                              3          D18 (*2)                                (*3)
         4      D15 (*1)                                 4                                      1
                                         D16 (*1)                                                         D12
                Door Unlock                                     D11         7 BB2
                                         Door Unlock                                                      Door Unlock
                Detection                                       Door Unlock
                                         Detection                                                        Detection
                Switch                                          Detection Switch
                                         Switch                                  GR    (*3)               Switch
                Front LH                                        Rear LH
      3                                  Front RH                                            2            Rear RH
                              4                          3
             W-B                       W-B                 W-B (*3)                    W-B (*3)
   14 IA1                 14 IF1                       8 BA2                                  8 BB2
     A         W-B            A         W-B
                                                                                                        W-B (*3)
                J5                       J9                               W-B (*3)
                J/C                      J/C
          ID                      IF                                                            BG
                                                   *1: w/ Door Lock Control
                                                   *2: w/o Door Lock Control
                                                   *3: 4-Door

 2002 ECHO (RM884U)

                                                                                 Author :                         Date :                 609
                                    DIAGNOSTICS     -   THEFT DETERRENT SYSTEM


   1     Check Door Unlock Detection Switch.

            Disconnect                    (a) Remove the door trim and service hole cover.
                                          (b) Disconnect the door unlock detection switch connector.
                                          Check continuity between terminals 3 and 4 of door unlock
                                          detection switch connector, when the door lock knob is oper-
                                          ated to the lock side and unlock side.
                                 I14917       Switch Condition         Tester connection            Specified condition
                                                Door unlock                  3-4                        Continuity
                                                  Door lock                   -                       No continuity

                                            NG          Replace door unlock detection switch.


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

                                            NG          Repair or replace harness or connector.


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

2002 ECHO (RM884U)

                                                                 Author :                  Date :                     610

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