Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di ax cip1725

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cip1725


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DI-184
                                                  DIAGNOSTICS        -   AUTOMATIC TRANSAXLE
                                                                                                                                             DI6UI-01




    DTC                P1725               NT Revolution Sensor Circuit Malfunction
                                           (Input Turbine Speed Sensor)

CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT)
and the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropri-
ately controls the engine torque and hydraulic pressure in response to various conditions, thus performing
smooth gear shifting.
   DTC No.                      DTC Detecting Condition                                                  Trouble Area
             The ECM detect conditions (a), (b), (c) and (d) continuity for 5
             secs or more.
             (1-trip detection logic)                                           S Open or short in input turbine (NT) speed sensor circuit
   P1725     (a) Vehicle speed: 50 km/h (20 mph) or more                        S Input turbine (NT) speed sensor
             (b) 2nd, 3rd or O/D gear                                           S ECM
             (c) Solenoid valves and park/neutral position switch are normal
             (d) NT < 300 rpm


WIRING DIAGRAM

                                                                                                             ECM



                                                                                               5
                                                  R
                                                                                              E5    NT+

                 2

                      Input Turbine
                      Speed Sensor
                 1
                                                                                              11
                                                  B
                                                                                              E5 NT-




                                                                                                                                             D07934




 2002 ECHO (RM884U)

                                                                                   Author :                     Date :                         354
                                                                                                DI-185
                                    DIAGNOSTICS   -   AUTOMATIC TRANSAXLE

INSPECTION PROCEDURE

  1     Check resistance between terminals NT+ and NT- of ECM.

                                        PREPARATION:
                                        Disconnect the connector from ECM.
                                        CHECK:
                                        Check resistance between terminals NT+ and NT- of ECM.
                                        OK:
                        NT+                  Resistance: 620 



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