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                                                                                                                              DI-189
                                                DIAGNOSTICS       -    AUTOMATIC TRANSAXLE
                                                                                                                               DI6UG-02




    DTC              P1780                Park/Neutral Position Switch Malfunction

CIRCUIT DESCRIPTION
The neutral start switch detects the shift lever position and sends signals to the ECM. The ECM receives
signals (NSW, R, D, 2 and L) from the park/neutral position switch.
  DTC No.                      DTC Detecting Condition                                                  Trouble Area
            When driving under conditions (a), (b), (c) and (d) for 30 se-
            conds or more, the park/neutral position switch is ON (N posi-
            tion).
                                                                             S Shot in park/neutral position switch circuit
            (2-trip detection condition)
   P1780                                                                     S Park/neutral position switch
            (a) Vehicle speed: 70 km/h (44 mph) or more
                                                                             S ECM
            (b) Engine speed: 1,500 - 2,500
            (c) Engine load: 0.6 g/rev
            (d) Manifold absolute pressure: 350 mmHg or more




2002 ECHO (RM884U)

                                                                              Author :                       Date :            359
DI-190
                                                   DIAGNOSTICS         -   AUTOMATIC TRANSAXLE

WIRING DIAGRAM

                            N1
                            Park/Neutral                                                                                               ECM
                            Position Switch
                                                                                                                             5
                                     DL    7
                                                                                                                             E7    D
                                                                                    R-Y

                                                                           Instrument Panel J/B

                                                       3                    9                              13               17
                                     RL 2
                4                                     IE1                  1E                              1H               E4     R
                         3 RB           R-Y                      R-Y                                                R-Y
               IE1
                      R-B
         R-B                                           7                    4                               6               18
                                           4
                                                      IE1                  1E                              1H               E4     2
     1E    5                          2L       G                  G                                                  G

                                            14                              3                               4               19
                                        8
                                            IE1                            1E                              1H               E4     L
          GAUGE                      LL G-W                      G-W                                                G-W
                                                                           7                               15               22
                                                                           1O                              1H               E4     NSW
     1O 4                          Ignition Switch           B                                                       B
         Instrument                                                         1                               7
         Panel J/B             4                       5
                                                                           1O                              1A
                                   ST2         AM2          W-R

                                                                            8            AM1                1
                      B-Y      2                       1                            2              1
                                                                           1O                              1C              W-R
                                   IG1         AM1           W-L

                                                                                        *1
                                           4                                                 B-G
                                                                                              *2
                               ALT                                                                 B

                                                                                             AM2
                                                                                         1             2
           Battery                         2
                                                                                1                               1
                             MAIN                          B-L
                        Fusible Link Block                                          Engine Room R/B



                                               *1:   Ex. Puerto Rico
                                               *2:   Puerto Rico




                                                                                                                                             D07922




2002 ECHO (RM884U)

                                                                                        Author :                          Date :             360
                                                                                                                           DI-191
                                         DIAGNOSTICS    -    AUTOMATIC TRANSAXLE

INSPECTION PROCEDURE

   1      Read PNP, REVERSE, 2ND and LOW signals.

                                               When using TOYOTA hand-held tester:
                                               PREPARATION:
                                               (a) Connect a hand-held tester to the DLC3.
                                               (b) Turn the ignition switch ON and TOYOTA hand-held tes-
                                                      ter main switch ON.
                                               CHECK:
                                               Shift lever into the P, R, N, 2 and L positions, and read the NSW,
                                               REVERSE, 2ND and LOW signals on the hand-held tester.
                                               OK:
                                                              Shift range                                  Signal
                                                                  2                                  2ND OFF  ON
                                                                  L                                  LOW OFF  ON
                                                                  D                                 DRIVE OFF  ON
                                                                  R                               REVERSE OFF  ON
                                                                 P, N                               NSW OFF  ON

         ON                                    When not TOYOTA using hand-held tester:
                                               PREPARATION:
                D         NSW L 2 R            Turn the ignition switch ON.
                                               CHECK:
                                               Measure voltage between each of terminals NSW, R, D, 2 and
                                               L of ECM and body ground when the shift lever is shifted to the
          (-)       (+)                        following positions.
BE3840                                         OK:
D05644
                                      D08440
                                                            NSW-Body        R-Body     D-Body       2-Body          L-Body
                                                Position
                                                            ground          ground     ground       ground          ground

                                                  P         9 - 14 V          0V         0V           0V              0V

                                                  R           0V            9 - 14 V     0V           0V              0V

                                                  N           0V             0V          0V           0V              0V

                                                  D           0V             0V        9 - 14 V       0V              0V

                                                  2           0V             0V          0V         9 - 14 V          0V

                                                  L           0V             0V          0V           0V            9 - 14 V

                                               HINT:
                                               *: The voltage will drop slightly due to lighting up of the back up
                                               light.

                                                 OK          Check and replace the ECM.


  NG

2002 ECHO (RM884U)

                                                                        Author :                  Date :                       361
DI-192
                                  DIAGNOSTICS     -       AUTOMATIC TRANSAXLE



   2     Check park/neutral position switch.

                                        PREPARATION:
                                        Remove the park/neutral position switch.
                                        CHECK:
                                        Check continuity between each terminal shown below when the
                                        shift lever is moved to each position.
                                              Shift position                    Terminal No. to continuity
                                                      P                    3-5                           6-9
                                                      R                    3-4                               -
                               D06601
                                                      N                    1-3                           6-9
                                                      D                    3-8                               -
                                                      2                    2-3                               -
                                                      L                    3-7                               -

                                        OK:
                                              There is continuity.

                                          NG          Replace the park/neutral position switch.


  OK



   3     Check harness and connector between battery and park/neutral position switch,
         park/neutral position switch and ECM (See page IN-29 ).


                                          NG          Repair or replace the harness and connector.


  OK



  Check and replace the ECM
  (See page IN-29 ).




2002 ECHO (RM884U)

                                                                Author :                Date :                   362



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