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cip0773


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DI-180
                                                DIAGNOSTICS       -   AUTOMATIC TRANSAXLE
                                                                                                                                  DI6UK-02




    DTC               P0773               Shift Solenoid E Electrical Malfunction
                                          (Shift Solenoid Valve SL)

CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock-up relay valve, which then controls operation of the lock-up clutch.
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
  DTC No.                      DTC Detecting Condition                                                 Trouble Area
             Either (a) or (b) is detected for 1 time.
             (2-trip detection logic)
                                                                             S Open or short in shift solenoid valve SL circuit
             (a) Solenoid resistance is 8  or less when solenoid is ener-
   P0773                                                                     S Shift solenoid valve SL
             gized.
                                                                             S ECM
             (b) Solenoid resistance is 100 k or more when solenoid is not
             energized.


WIRING DIAGRAM

                 Transaxle                                                                                      ECM



               Shift Solenoid
               Valve SL              4                                                           6
                                                                 G
                                    E1                                                           E5     SL
                              LG




                                                                                                                                  D07913




2002 ECHO (RM884U)

                                                                                Author :                      Date :                350
                                                                                           DI-181
                                DIAGNOSTICS   -   AUTOMATIC TRANSAXLE

INSPECTION PROCEDURE

  1     Measure resistance between terminal SL of ECM and body ground.

                                      PREPARATION:
                                      Disconnect the connector from ECM.
                                      CHECK:
                                      Measure resistance between terminal SL of ECM and body
                                      ground.
                                      OK:
                                           Resistance: 11 - 15  at 20 



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